Mineral powder for asphalt concrete and organo-mineral mixtures. Specifications

Activated mineral powder: material obtained by grinding rocks or industrial solid waste with the addition of activating agents, grinding bituminous rocks, including oil shale. Activating agents: Mixture of surface-active agents (surfactants) or products containing surfactants with bitumen, rationally selected in relation to the chemical nature of the raw material for the production of mineral powder.

What is activated mineral powder?

One of the ways to improve the properties of mineral powders that are part of asphalt concrete mixtures is their physical and chemical activation, which may result, for example, in the appearance of hydrophobicity in the aggregate, or endowing the powder mass with improved adhesive properties. The UZSM production line allows you to implement these and other tasks with a stable and long-term effect.

To learn more

The essence of activation lies in the fact that the process of grinding the feedstock is accompanied by its treatment with activating agents: anionic or cationic surfactants (surfactants), bitumen. There are strong bonds between the activator and the freshly formed mineral surface.

In our case, the substance injected into the grinding chamber in a special way envelops each particle of mineral powder with a size of about 70 microns with a film of about 15 nanometers. As a result, the entire aggregate mass acquires new properties: the mineral hydrophilic surface turns into a hydrophobic one, and the conditions for its interaction with bitumen (adhesion) are significantly improved .

Due to such a change in the properties of the surface of the grains, activated mineral powders are better wetted by bitumen, do not absorb moisture, do not cake during storage and transportation, and have a reduced porosity.

The high quality of the activated mineral powder produced by the plant provides the possibility of preparing asphalt concrete with increased density, strength, shear resistance and crack resistance. The consumption of bitumen for the preparation of such mixtures is about 10% less than mixtures based on non-activated powder, which gives asphalt producers the opportunity to reduce the cost of their products. In addition, the use of activated mineral powders makes it possible to obtain asphalt concrete with the largest number of closed pores, which causes their low water saturation, and , respectively, and increased water and frost resistance of the road surface.

The preparation, paving and compaction of asphalt mixes on our activated mineral powder allows to perform at a lower temperature compared to the use of non-activated powder.

In addition, the compaction of asphalt concrete is facilitated, due to which the number of passes of the rolled area by rollers is reduced.

Application area

The main field of application of mineral powder is the production of asphalt at asphalt concrete plants, where mineral powder serves as a filler that increases the structure, viscosity and adhesiveness of bitumen, improves plasticity, elasticity, and strength of the asphalt mass, which ultimately leads to an increase in the durability of the road surface.

To learn more

Strict modern requirements for the quality of roads on the part of the state necessitate the use of higher quality components, in particular mineral powder, for the production of asphalt mixtures. Of all the structural elements of the road, the top layer of asphalt concrete pavement works in the most difficult conditions.

On the one hand, this is the influence of static effects and dynamic transport loads and the shear, tensile and bending forces associated with them, leading to stresses in the coating. A material with a sufficient margin of safety can withstand such stresses. The increasing traffic intensity every year poses an urgent task of creating a durable asphalt concrete pavement that is resistant to the action of variable in magnitude, speed and frequency of application, loads from moving vehicles in any critical periods. Here the influence of high-quality mineral powders on the properties of asphalt concrete should manifest itself. Strengthening the structured dispersed system bitumen - mineral powder, increasing the density and strength of the asphalt concrete mass improves the resistance to deformation and other transport and operational indicators of road surfaces.

On the other hand, climatic conditions are an important factor affecting the roadway. Under the influence of atmospheric oxygen, solar radiation, temperature changes, atmospheric precipitation, irreversible physical and chemical processes occur in asphalt concrete, leading to aging, resulting in a decrease in its deformability and corrosion resistance. When exposed to low temperatures, a brittle rupture of the roadway is possible, leading to the appearance of cracks on its surface, and then potholes as a result of the expansion of frozen water that has entered the asphalt pavement through the cracks.

High-quality mineral powder significantly improves the most important physical and mechanical properties of asphalt concrete: it reduces water permeability or water saturation, increases frost resistance, which significantly slows down the process of cracking.

Production of mineral powder MP-1

Mineral powder MP-1 is manufactured according to the GOST R 52129-2003 regulatory document and is used in the production of asphalt concrete mixes, dry mixes, in the chemical, metallurgical and glass industries, as well as UZSM produces Mineral powder with increased consumer requirements for elasticity and softness TU 5716-004 -91892010-2011.

Mineral road powder

The construction of roads and large highways in Russia and neighboring countries is gaining momentum due to the availability of mineral powder MP-1 R GOST 52129-2003. Mineral powder prevents moisture penetration, reduces water saturation of the coating, which has a positive effect on the service life. The priority is the possibility of using it in asphalt concrete, where clay particles are present, this can significantly reduce costs in the construction of roads.

Types of mineral powder MP-1

Mineral powder is divided into several types: activated (completely hydrophobic MP-1A) and non-activated (non-hydrophobic MP-1)

Varieties of mineral powder

It is also customary to divide mineral powder into grades: grade 1 - obtained by grinding carbonate rocks with an exact fraction of 300-315 microns. Grade 2 - Obtained by processing waste from the main production of carbonate rocks of a fraction of 300-800 microns with inclusions. The chemical composition of the varieties is completely identical, however, the cost of the 1st grade is much higher when the 2nd grade is supplied at the price of sand.

To learn more

When choosing a mineral powder, one should take into account the type of asphalt concrete in which it will be used, since it varies greatly in terms of such parameters as grain size, hydrophobicity, porosity, swelling, and some others. Mineral powder is used in the production of asphalt concrete mixtures of various categories. Unlike other raw materials, it has undeniable advantages: high hydrophobicity and bitumen capacity, which allows it to be evenly distributed in bitumen. The list of benefits of mineral powder does not end there.

Packing of mineral powders MP-1

In our production, mineral powder undergoes a process of high-tech additional drying. For protection against moisture and ease of loading and use, mineral powder is packaged in "big bags" with a polypropylene insert weighing 1000 kg, and in bulk machines, which simplifies use in production. All our products are stored in a covered warehouse, which is especially important in the Ural climate. We supply mineral powder on the territory of the Russian Federation and the CIS. Mineral powder can be bought in Yekaterinburg, Chelyabinsk, Neftekamsk.

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Mineral powder - a substance obtained by grinding rocks - dolomites, various types of limestone or solid waste from industrial production. Mineral powder is used as one of the components for asphalt mixes. Products meet the requirements GOST 32761-2014 “Public automobile roads. Mineral powder. Specifications".

As part of asphalt concrete, the powder improves the main characteristics of the road surface - viscosity, strength, adhesive properties, corrosion and deformation resistance.

Classification

There are two types of powder on sale - activated and non-activated. Activated mineral powder is produced with the addition of activating agents.

Mineral powder also differs in properties and raw materials used:

• MP-1 - powder activated from sedimentary (carbonate) rocks.
• MP-2 - non-activated powder from carbonate rocks.
• MP-3 - non-activated powder from non-carbonate rocks, solid and powder industrial waste.

Price

At the moment, the cost (price per ton including VAT) for mineral powder for asphalt concrete mixtures according to GOST 52129-2003 and GOST 32761-2014 is from 1600 rubles per ton to 2600 rubles per ton of products depending on packaging (FIBC or bulk) and activation.

Passport

Physical and mechanical properties of mineral powder (activated):

Production process

Production mineral powder is carried out in several stages.

1. Preparation of raw materials. Drying of the source material takes place in special drums.
2. If crushed limestone has high strength, it undergoes preliminary crushing on roll or hammer installations. In some cases, this step is skipped.
3. At the same time, a mixture of activating agents is being prepared. Surfactants and bitumen are heated to operating temperature and mixed together.
4. Dried raw materials and activating agents are mixed in the required proportions in paddle mixers. Other types of apparatus may be used.
5. The well-mixed mixture is sent to the mill for grinding to the required fraction.
6. The finished mineral powder is transferred to a storage bin or a warehouse for storage.

Powder activation

When using activated powder, the asphalt mix will have better performance. To do this, an activating mixture of surfactants and bitumen is added to the mineral powder. A strong bond is formed between the crushed material particles and the activator. As a result, the surface of the powder becomes hydrophobic, and its individual particles interact better with bitumen. In the composition of the asphalt concrete mixture, it is the mineral powder that is chosen for activation, since this is the most homogeneous component of the mixture in terms of composition.

Asphalt mix based on activated mineral powder has several advantages:

• Increased density of the material.
• Stronger consistency.
• Moisture and frost resistance.
• Crack resistance.
• The required amount of bitumen is reduced by 15%.
• Laying the mixture can be done at lower temperatures.

Storage and transportation

During production, the powder is transported along completely enclosed conveyors, conveyors, screws. Mineral powder is stored in silos and silos. In order for the material not to cake, it is necessary to periodically carry out special measures - aeration, pumping and other methods. Pneumatic transport is used for transportation on the territory of the enterprise. It is necessary to transport the powder outside the enterprise in cement trucks, closed wagons, containers. When packing in small containers, the powder is stored in warehouses. Small packing bags should be multi-layer - paper or polyethylene. In this case, the mineral powder is transported in simple closed freight wagons.

Strict quality control of the mined and supplied feedstock makes it possible to obtain high quality mineral powder.

Our products meet state quality standards and the high requirements of our customers in the cities of Moscow, Krasnodar, Kemerovo, Rostov, Irkutsk, Chelyabinsk, Yekaterinburg, Novokuznetsk, Voronezh, Penza, Krasnoyarsk.

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POWDER MINERAL
FOR ASPHALT CONCRETE
AND ORGANOMINERAL MIXTURES

Specifications

GOSSTROY OF RUSSIA
Moscow

Foreword

1 DEVELOPED by the Federal State Unitary Enterprise State Road Research Institute (FSUE Soyuzdornii) and the State Enterprise Russian Road Research Institute (SE Rosdornii)

2 INTRODUCED by the Department of technical regulation, standardization and certification in construction and housing and communal services of the Gosstroy of Russia

4 INTRODUCED FOR THE FIRST TIME (this object of standardization was previously covered by GOST 16557-78 and GOST 12784-78, the use of which in the Russian Federation was discontinued at the same time With implementation of this standard)

1 area of ​​use. 2 3 Definitions. 2 4 Classification. 2 5 Technical requirements. 3 5.1 Main indicators and characteristics (properties) 3 5.2 Requirements for materials .. 3 6 Acceptance rules. 4 7 Methods of control. 6 7.1 General provisions. 6 7.2 Determination of grain composition. 6 7.3 Determination of true density. 7 7.4 Determination of average density. 10 7.5 Determination of porosity. eleven 7.6 Determination of the swelling of samples from a mixture of powder with bitumen .. 12 7.7 Determination of the water resistance of samples from a mixture of powder with bitumen .. 15 7.8 Determination of the bitumen capacity index. 16 7.9 Determination of the hydrophobicity of the activated powder. 17 7.10 Determination of humidity. 17 7.11 Determination of the content of activating substances in the activated powder. 18 7.12 Determination of the content of water-soluble compounds. 19 8 Transportation and storage. 20 9 Manufacturer's Warranties. 20 Appendix A Scope of mineral powders. 20 Appendix B List of normative documents, references to which are given in this standard. 21

STATE STANDARD OF THE RUSSIAN FEDERATION

POWDER MINERAL
FOR ASPHALT CONCRETE
AND ORGANOMINERAL MIXTURES

Specifications

MINERAL POWDERS FOR ASPHALTIC CONCRETE
AND ORGANOMINERAL MIXTURES

Specifications

Introduction date 2003-10-01

1 area of ​​use

This standard applies to mineral powders used as a component of asphalt concrete and other types of organo-mineral mixtures, and establishes requirements for them and methods for their testing.

The scope of mineral powders is given in Appendix A.

2 Normative references

3 Definitions

In this standard, the following terms are used with their respective definitions:

mineral powder: Material obtained by grinding rocks or industrial solid waste.

activated mineral powder: Material obtained by grinding rocks or industrial solid waste with the addition of activating agents, by grinding bituminous rocks, including oil shale.

activating agents: Mixture of surface-active substances (surfactants) or products containing surfactants with bitumen, rationally selected in relation to the chemical nature of the raw materials for the production of mineral powder.

carbonate rock: Sedimentary rock composed of more than 50% of one or more carbonate minerals, such as limestone, dolomite, and intermediate varieties between them.

non-carbonate rock: Sedimentary or igneous rock, consisting of more than 50% silica minerals, such as flasks, tripoli, tuffs, sandstones, granites.

powder waste of industrial production: Wastes of industrial production that do not require grinding, such as fly ash and ash and slag mixtures from thermal power plants, fly dust from cement plants, metallurgical slag, etc.

4 Classification

Powders, depending on the properties and the raw materials used, are divided into grades:

MP-1 - non-activated and activated powders from sedimentary (carbonate) rocks and powders from bituminous rocks.

MP-2 - powders from non-carbonate rocks, solid and powder wastes of industrial production.

5 Technical requirements

Powders must comply with the requirements of this standard and be prepared according to the technological regulations approved in the prescribed manner.

5.1 Main indicators and characteristics (properties)

5.1.1 The properties of powders must comply with the requirements specified in Table 1.

5.1.2 Activated mineral powders must be hydrophobic.

Table 1 - Indicators of properties of powders

Name of indicator	Value for Powder Grade
	non-activated powder	activated powder
Grain composition, % by weight: smaller than 1.25 mm	At least 100 At least 90 70 to 80	At least 100 At least 90 At least 80	At least 95 80 to 95 At least 60
Porosity, %, no more
Swelling of samples from a mixture of powder with bitumen,%, no more
Water resistance of samples from a mixture of powder with bitumen,%, no more	Not standardized
Bitumen capacity index, g, no more
Humidity, % by mass, no more		Not standardized
Note - In a mineral powder obtained from a rock whose compressive strength is higher than 40 MPa, the content of grains finer than 0.071 mm is allowed to be 5% less than that indicated in the table.

5.1.3 Powders, depending on the value of the total specific effective activity of natural radionuclides A eff in rocks and industrial waste, use:

at A eff up to 740 Bq / kg - for the construction of roads and airfields within the territory of settlements and zones of promising development;

at A eff up to 1500 Bq/kg - for the construction of roads outside settlements.

5.2 Material requirements

7.0 - for activated powders;

1.7 - for non-activated powders.

5.2.2 In bituminous rocks and oil shale used for the preparation of activated powders, the content of organic matter should be from 2% to 15% by weight.

5.2.3 In solid industrial production waste used for the preparation of powders, and in powder industrial production waste used as powders, the content,% by weight, is allowed:

active CaO + MgO - no more than 3;

water-soluble compounds - no more than 6.

5.2.5. Losses on ignition in industrial solid waste used for the preparation of powders, and in powder industrial waste used as powders (for example, fly ash and ash and slag mixtures from thermal power plants) should not exceed 20% by weight.

5.2.6 The following are used as activating agents used for the production of activated powders:

Anionic surfactants of the type of higher carboxylic acids (gossypol resin, fatty tar, oxidized petrolatum, synthetic fatty acids, etc.) that meet the requirements established in the regulatory documentation;

Cationic surfactants such as amines, diamines or their derivatives that meet the requirements established in the regulatory documentation;

6 Acceptance rules

6.1 The powder must be accepted by the manufacturer's department responsible for technical control.

6.2 Acceptance and delivery of the powder is carried out in batches.

When accepting a batch, the amount of powder released per shift on each production line is considered, but not more than 200 tons.

When shipped by road, a batch is the amount of powder shipped to one consumer during the day.

When shipped by rail, a batch is the amount of powder that is simultaneously shipped to one consumer in one train.

6.3 Powder quality control is carried out by testing one pooled powder sample taken from each lot.

6.4 The combined sample consists of incremental samples taken from the supply (accumulative) bin or directly from the production line.

Sampling starts 30 minutes after the start of the release of the powder and then every hour during the shift.

The interval for taking incremental samples, depending on the performance of the process equipment, can be increased, while the number of incremental samples must be at least four.

6.5 The mass of an incremental sample at a sampling interval of 1 hour must be at least 500 g. With an increase in the sampling interval, the mass of the selected incremental sample must be increased: at an interval of 2 hours - twice, at an interval of 3 hours - four times.

6.6 Selected incremental samples are thoroughly mixed and reduced by quartering to obtain a laboratory sample.

For quartering, the material sample is leveled and divided by mutually perpendicular lines passing through the center into four parts. Any two opposite sides are sampled.

6.7 The mass of a laboratory sample for acceptance control should be at least 1 kg, for periodic control - at least 3 kg.

By successive quartering, the sample is halved, quadrupled, etc. until a sample of the above mass is obtained.

6.8 During acceptance control, determine:

grain composition;

humidity;

hydrophobicity (for activated powders).

6.9 Periodic control is carried out with each change in the composition of the starting materials, but at least once a month. During periodic monitoring, determine:

porosity;

swelling of samples from a mixture of powder with bitumen;

bitumen capacity index (for MP-2 grade powder);

water resistance of samples from a mixture of powder with bitumen (for MP-2 powder).

6.10 The specific effective activity of natural radionuclides in powders is taken according to the maximum value of the specific effective activity of natural radionuclides contained in the mineral materials used for their preparation, which should be submitted at least once a year. These data should be taken into account when deciding on the supply and use of the powder in accordance with 5.1.3 of this standard.

6.11 For each batch of powder shipped to the consumer, the manufacturer is obliged to issue a quality document, which indicates the following information:

name of the manufacturer;

number and date of issue of the passport;

name and address of the consumer;

batch number and amount of powder;

name and brand of powder;

the name of the raw material used to prepare the powder;

grain composition;

humidity;

hydrophobicity (for activated powder);

porosity;

swelling of samples from a mixture of powder with bitumen;

bitumen capacity index (for MP-2 powders);

water resistance of samples from a mixture of powder with bitumen (for MP-2 powders);

specific effective activity of natural radionuclides.

6.12 The consumer has the right to carry out a control check of the quality of the supplied powder.

For a control check of the quality of the powder shipped by road, one point sample is taken when unloading each car.

To control the quality of the powder supplied by rail, five point samples are taken during unloading the car at regular intervals, the choice of the car is carried out by random selection.

From point samples, a combined sample is made up, characterizing the controlled lot. The mass of the combined sample must be at least 7 kg.

6.13 For each sample intended for control tests in a specialized laboratory, as well as for arbitration tests, a sampling report is drawn up containing the name and designation of the material, the place and date of sampling and the signatures of the persons responsible for sampling.

The selected samples are packed in such a way that the mass and properties of the powder do not change before the test.

Each sample is provided with two labels with the designation of the sample: one label is placed inside the package, the other is fixed in a conspicuous place on the package. When transporting the sample, ensure that the packaging and labels are intact. The shelf life of the sample is at least 3 months.

7 Control methods

7.1 General

7.1.1 The applied means of control (measurements), equipment, as well as auxiliary devices must be verified and certified in the prescribed manner. The use of similar imported equipment is allowed.

7.1.2 The air temperature in the test room shall be (20 ± 5) °C.

7.1.3 When using hazardous (caustic, toxic, flammable) substances as reagents, one should be guided by the safety requirements set forth in the regulatory documents for these substances.

7.1.4 Before testing, powder samples, excluding the sample intended for determining moisture, are dried in an oven at a temperature of (105 ± 5) ° C to constant weight.

Activated powders are not dried before testing.

7.1.5 Weighing is carried out on a general-purpose laboratory balance of the 4th accuracy class according to GOST 24104 with a permissible weighing error of 0.1% of the mass. The mass is determined in grams to the second decimal place after the decimal point.

7.1.6 The test results are calculated to the second decimal place by the rounding method, unless otherwise specified in the method regarding the accuracy of the calculation.

7.2 Determination of grain composition

The essence of the method is to determine the grain composition by sifting the powder through a standard set of sieves.

7.2.1 Means of control (measurements), equipment, materials, auxiliary devices

Set of sieves with grids No. 1.25; 0315; 0071 according to GOST 6613.

Mechanical screening device.

Scales of the 4th accuracy class according to GOST 24104.

Drying cabinet.

Porcelain cup with a diameter of 15-20 cm according to GOST 9147.

Porcelain pestle with rubber tip according to GOST 9147.

Vessel with a capacity of 6 to 10 liters.

Pear rubber.

Drinking water.

7.2.2 The procedure for preparing and conducting a test

When testing activated powders, a wetting agent is added to the water used for washing.

As a wetting agent, powdered, pasty and liquid technical or household detergents are used. The wetting agent is introduced into the water in the following amount per 1 liter of water: liquid - 15 g, pasty (as a solution in water in a ratio of 1: 1) - 10 g, powder - 3 g.

From a sample of mineral powder prepared in accordance with 7.4, a sample of about 50 g is taken, placed in a porcelain cup, poured with a small amount of water (the powder must be covered with water) and rubbed for 2-3 minutes with a pestle with a rubber tip, after which water with suspended in her powder particles are poured through a sieve with mesh No. 0071, installed above the vessel.

This operation is continued until the water in the cup becomes clear.

After washing, the powder particles larger than 0.071 mm remaining on the grid are washed off with a rubber pear into a porcelain cup.

The water remaining in the cup is carefully drained, the cup is placed in an oven, the rest of the powder sample is dried at a temperature of (105 ± 5) ° C to constant weight.

It is not allowed to wash and grind the powder directly on the sieve.

The dried residue of the sample is successively sifted through sieves with meshes No. 1.25; 0315 and 0071 manually or on a mechanical sifter. Sifting is considered complete if, after shaking the sieve for 30 s, the number of particles that have passed through sieve No. 1.25 does not exceed 0.05 g, and those that have passed through sieves No. 0315 and 0071 - 0.02 g. The residue on each sieve is weighed.

For the current (operational) control of the grain composition, it is allowed to sift the powder without preliminary washing, provided that a device for mechanical sieving is used. From the powder sample prepared in accordance with 7.1.4, a sample of about 50 g is taken and placed in a set of sieves with a tray and a lid installed in a mechanical sieving device. Sifting in the device is continued for 30 - 40 minutes, after which the device is stopped and control sifting is performed manually. Sifting is considered complete if, after shaking the sieve for 30 seconds, the number of particles that have passed through sieve No. 1.25 does not exceed 0.05 g, and those that have passed through sieves No. 0315 and 0071 - 0.02 g.

7.2.3 Treatment of test results

Based on the screening results, calculate:

Partial residues on each sieve a i , %, according to the formula

Where Ti- mass of the residue on this sieve, g;

T - sample weight, g;

M 1.25 \u003d 100 - a 1.25; M 0.315 \u003d M 1.25 - a 0.315; M 0.071 \u003d M 0.315 - a 0.071. (2)

The result of each test is calculated to the second decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 2%.

The grain composition is calculated as the arithmetic mean of the results of two parallel tests.

7.3 Determination of true density

The essence of the method is to determine the density of the powder without taking into account the pores present in it.

7.3.1 Determination of the true density of an unactivated mineral powder from rocks

7.3.1.1 Means of control (measurements), equipment, materials, auxiliarydevices

GOST 1770.

Scales of the 4th accuracy class according to GOST 24104.

Bathtub sand or electric stove with a closed spiral.

7.3.1.2 Procedure for preparing and conducting a test

From the powder sample prepared in accordance with 7.1.4, take two portions (for two parallel determinations) of about 10 g each if the true density is determined in 100 ml flasks, or about 50 g if 250 ml flasks are used.

Each weighed portion of the powder is poured into a clean, dried and weighed flask, after which the flask with the powder is weighed again and 1/3 filled with distilled water.

The contents of the flask are shaken and boiled in a sand bath for 1 hour and then cooled to room temperature. After that, the flask is filled with distilled water up to the line on the neck of the flask and weighed. Then the flask is freed from the contents, washed, filled to the line on the neck with distilled water at room temperature and weighed again.

7.3.1.3 Treatment of test results

The true density of the powder r, g / cm 3, is calculated by the formula

Where T- mass of the flask with powder, g;

T 1 - mass of an empty flask, g;

T 2 - weight of the flask with distilled water, g;

T 3 - mass of the flask with powder and water, g;

r in - the density of distilled water, equal to 1 g / cm 3.

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

7.3.2 Determination of the true density of activated mineral powder

7.3.2.1 Means of control (measurements), equipment, materials, auxiliary devices

Means of control (measurements), equipment, materials and auxiliary devices - according to 7.3.1.1, wetting agent solution - according to 7.2.2.

7.3.2.2 Procedure for preparing and conducting a test

The true density of the wetting agent solution is determined by the pycnometric method according to GOST 3900.

The tests are carried out according to 7.3.1.3, using a wetting agent solution instead of distilled water.

7.3.2.3 Treatment of test results

The true density of the activated powder r, g/cm 3 , is calculated by the formula

Where T - weight of the flask with powder, g;

T 1 - mass of an empty flask, g;

T 2 - mass of the flask with the wetting agent solution, g;

T 3 - weight of the flask with powder and wetting agent solution, g;

r c is the density of the wetting agent solution, g/cm 3 .

The result of each test is calculated to the second decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 0.02 g/cm 3 .

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

The true density is calculated as the arithmetic mean of the results of two parallel tests.

7.3.3 Determination of the true density of industrial waste powder

7.3.3.1 Means of control (measurements), equipment, materials, auxiliary devices

Volumetric flasks with a capacity of 100 ml or 250 ml according to GOST 1770.

Scales of the 4th accuracy class according to GOST 24104.

Installation is vacuum.

Funnel with a diameter of 120-150 mm glass in accordance with GOST 23932.

Kerosene lighting.

Silica gel brand ASK fraction 0.25-0.5 mm according to GOST 3956.

7.3.3.2 How to prepare for a test

The powder is prepared for the test according to 7.1.4.

Kerosene is prepared as follows: a glass funnel with a paper filter is inserted into a glass flask with a capacity of 1 liter. 120-150 g of silica gel is poured onto the filter. 500 ml of lighting kerosene are filtered in small portions through silica gel in a funnel.

The density of kerosene is determined by the pycnometric method according to GOST 3900.

7.3.3.3 Test procedure

Weigh two clean and dried volumetric flasks. About 50 g of powder is placed in each flask, after which the flasks with powder are weighed again and 1/3 filled with purified kerosene.

The flasks are placed in a vacuum unit and kept for 30 minutes at a residual pressure of not more than 0.002 MPa (15 mm Hg).

After that, the flasks are removed from the vacuum unit, kept for 30 min at room temperature, filled with kerosene to the line on the neck and weighed. Then the flasks are freed from the contents, filled with kerosene to the line on the neck and weighed.

7.3.3.4 Treatment of test results

The true density of the powder, r to, g / cm 3, is calculated by the formula

Where T - weight of the flask with powder, g;

T 1 - mass of an empty flask, g;

T 2 - mass of the flask with kerosene, g;

T 3 - mass of the flask with powder and kerosene, g;

r to - the density of kerosene, g / cm 3.

The result of each test is calculated to the second decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 0.02 g/cm 3 .

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

The true density is calculated as the arithmetic mean of the results of two parallel tests.

7.4 Determination of average density

The essence of the method is to determine the density of the powder after its compaction in the form of 100 cm 3 under a load of 40 MPa.

7 .4.1 Means of control (measurements), equipment, auxiliary devices

Powder compaction mold (Figure 1), consisting of a hollow split cylinder ( 1 - top part, 2 - lower part), liner 3 and metal pallet 4. The volume of the lower part of the form - (100+3) cm 3.

Scales of the 4th accuracy class according to GOST 24104.

Press hydraulic or mechanical with a load of at least 100 kN (10 tf) in accordance with GOST 28840.

A metal baking sheet with a size of at least 25x40 cm.

The brush is soft.

Knife or spatula.

7.4.2 Procedure for preparing and conducting a test

The powder is prepared for the test according to 7.1.4.

The lower part of the mold is placed on a pallet, weighed, and then the upper part is placed on it.

The powder in portions of 60-80 g is transferred to the assembled form, distributed in layers and bayoneted with a knife or spatula, filling it 15-20 mm below the upper edge, and lightly pressed with an insert.

The form with the powder is placed on the bottom plate of the press, the sealing load is gradually increased to 40 MPa and maintained for 3 minutes. After that, the load is removed and the form with the insert is transferred to a baking sheet.

The liner and the upper part of the mold are removed, the excess of powder above the lower part of the mold is cut off with a knife, the outer parts of the mold and the tray are cleaned with a soft brush.

The lower part of the mold with the powder and the pallet is weighed.

7.4.3 Processing of test results

The average density of the powder r T, g / cm 3, calculated by the formula

Where T - mass of the lower part of the mold with a tray and compacted mineral powder, g;

T 1 - mass of the lower part of the mold with a pallet, g;

V- powder volume equal to 100 cm 3 .

1 - the upper part of the split cylinder, 2 - the lower part of the split cylinder; 3 - insert; 4 - pallet

Picture 1 - Form for determining the average density of the powder

The result of each test is calculated to the second decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 0.02 g/cm 3 .

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

The average density is calculated as the arithmetic mean of the results of two parallel tests.

7.5 Determination of porosity

The porosity of the mineral powder is determined by calculation based on the predetermined values ​​of the true density according to 7.3 and the average density according to 7.4.

Powder porosity V time, %, calculated according to the formula

5th time , (7)

where r is the true density of the powder, g/cm 3 ;

r T- average density of the powder, g/cm 3 .

The test result is calculated to the nearest whole number.

7.6 Determination of the swelling of samples from a mixture of powder and bitumen

The essence of the method is to determine the increment in the volume of samples with water saturation from 4% to 5% by volume from a mixture of powder with bitumen after saturation with water under vacuum and subsequent exposure to hot water.

7.6.1 Means of control (measurements), equipment, materials, auxiliarydevices

Scales of the 4th accuracy class according to GOST 24104 with a device for hydrostatic weighing.

Press hydraulic or mechanical with a load of at least 30 kN (3 tf) in accordance with GOST 28840.

Stirrer laboratory.

Drying cabinet providing temperature control up to 200 °С.

Metal molds for making samples (Figure 2) that meet the requirements of 7.6.2. The dimensions of the molds are shown in table 2.

Mercury glass thermometer with a scale division of 1 °C.

Installation is vacuum.

Container with a capacity of 2.0 - 3.0 liters.

Cup (bowl) metal.

Viscous oil road bitumen according to GOST 22245 with a needle penetration depth at a temperature of 25 °C from 60 to 130.0.1 mm.

7.6.2 Form requirements

7.6.2.1 Molds are made of steel with mechanical characteristics not lower than the corresponding structural steel St 35 according to GOST 1050.

7.6.2.2 On the working surfaces of the molds that come into contact with the mixture during the manufacture of samples, cracks, dents, marks, etc. are not allowed. The roughness of the working surfaces R and should not be more than 3.2 microns.

7.6.2.3 Permissible deviations from the nominal dimensions of the inner diameters of the cylinders and the outer diameters of the liners, shown in Figure 2, must provide a gap between the cylinder and the liner within 0.1 - 0.3 mm.

7.6.2.4 The deviation of the inner working surface of the mold from the cylindrical profile A shall not exceed 0.3 mm.

7.6.2.5 Deviation from the flatness of the end surfaces of the liners shall not exceed, mm:

0.015 - for liners with a diameter of 25.2 mm;

0.025 - for liners with a diameter of 50.5 mm.

7.6.2.6 Deviation from perpendicularity of the generatrix of the cylindrical surface of the liners relative to the surface of their bases shall not exceed, mm:

0.03 - for liners with a diameter of 25.2 mm;

0.04 - for liners with a diameter of 50.5 mm.

7.6.3 Procedure for preparing for the test

To establish the required ratio in the mixture of powder and bitumen, at which the water saturation of the samples will be from 4% to 5%, several mixtures with different bitumen content are prepared sequentially.

Figure 2 - Sample mold

table 2

Approximate consumption of bitumen, % of the mass of the powder, is:

for activated powders - 10-15;

for non-activated powders - 13-18;

for industrial waste - 25-30.

From the powder sample prepared according to 7.1.4, 100 or 1000 g are weighed (depending on the size of the molds used), placed in a metal cup (bowl) and heated to temperatures:

for activated powders - from 135 °С to 140 °С;

for non-activated powders and industrial production waste - from 150 °С to 160 °С.

Preliminarily dehydrated bitumen is introduced into the heated powder at a temperature of 140 °C to 160 °C (depending on the brand of bitumen used), mixed with a metal spoon, then the mixture is placed in a laboratory mixer for final mixing. It is allowed to prepare the mixture manually. The resulting mixture is placed in an oven, where the temperature is maintained as indicated above for different types of powders.

Forms and liners are heated to a temperature of 90 ° C to 100 ° C and lightly rubbed with kerosene or oil.

The form with the lower insert inserted is filled with a pre-weighed mixture (from 25 to 30 g or from 200 to 240 g, depending on the size of the form). The mixture in the form is leveled, weakly bayoneted 4-5 times with a knife or spatula, and then pressed with the upper insert inserted into the form.

The mold with the mixture is placed on the lower press plate in such a way that both the upper and lower inserts protrude from the mold by 1-2 cm. The upper press plate is brought into contact with the upper insert and the press motor is turned on. The pressure on the mixture to be compacted is gradually increased to 10 MPa and maintained under this load for 3 minutes, after which the load is removed, and the sample is removed from the mold using a squeeze tool.

Figure 3 - Determining the required bitumen content

At least three samples are made from each mixture, for which, not earlier than the next day after production, water saturation is determined according to the water saturation assessment method adopted for asphalt concrete in accordance with section 13 of GOST 12801.

On the basis of the data obtained, a graph of the dependence of water saturation on the content of bitumen in the mixture is built (Figure 3), which determines the amount of bitumen required to obtain water saturation in the range from 4% to 5% by volume. With a specified amount of bitumen for testing, three samples are made.

7.6.4 Test procedure

The samples are cleaned of adhering particles of the mixture, after which they are weighed in air and in water at a temperature of (20 ± 2) °C.

Weighed samples are placed in a vacuum device with water at a temperature of (20 + 2) ° C, while the water level above the samples must be at least 3 cm. In a vacuum installation, a pressure of not more than 0.002 MPa (15 mm Hg. Art.). Then the pressure is adjusted to atmospheric, at which the samples are kept for 30 min, after which the samples are transferred to another container, in which the water temperature is maintained at (60 ± 2) °C for 4 hours.

After 4 hours, the samples are placed in water with a temperature of (20 ± 2) °C and left for 16-18 hours, after which the samples are removed from the water, wiped and weighed in air and in water. If the temperature has changed by more than 2 °C over the past 16-18 hours, then 30 minutes before weighing it is brought to (20 ± 2) °C.

7.6.5 Treatment of test results

Sample swelling H, %, is calculated by the formula

Where T - mass of the sample in air according to 7.6.3, g;

t 1 - mass of the sample in water according to 7.6.3, g;

t 2 is the mass of the sample in air after the test according to 7.6.3, g;

t 3 - mass of the sample in water after the test according to 7.6.3, g.

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

Swelling is calculated as the arithmetic mean of the results of three replicate tests.

7.7 Determination of the water resistance of samples from a mixture of powder with bitumen

The essence of the method is to assess the degree of drop in compressive strength of samples from a mixture of powder with bitumen after saturation with water in a vacuum and subsequent exposure to hot water.

7.7.1 Means of control (measurements), equipment, auxiliary devices

Means of control (measurements), apparatus and auxiliary equipment - according to 7.6.1 and 15.1 GOST 12801.

7.7.2

To determine the water resistance, six samples are made with water saturation from 4% to 5% by volume according to 7.6.2. Three samples are saturated with water in the mode given in 7.6.3, and three samples are kept before testing in accordance with 15.2 of GOST 12801.

The compressive strength of the samples is determined at a temperature of (20 ± 2) ° C according to GOST 12801.

7 .7.3 Handling test results

Water resistance K water is calculated by the formula

Where K waters- compressive strength of samples after saturation with water according to 7.6.3, MPa;

R- compressive strength of specimens held before testing in accordance with 15.2 GOST 12801, MPa.

7.8 Determination of the bitumen content index

The essence of the method is to determine the amount of oil, in which its mixture with 100 cm 3 of powder has a given consistency.

7.8.1 Means of control (measurements), equipment, materials, auxiliary devices

GOST 24104.

Porcelain cup with a diameter of 10 - 12 cm.

Industrial oil grade M.8V according to GOST 20799.

Knife or spatula.

7.8.2 Procedure for preparing and conducting a test

Powder preparation for testing - according to 7.1.4.

A portion of powder 200 - 250 g is weighed from the prepared sample. 15 g of oil with a temperature of (20 ± 2) ° C is weighed into a porcelain cup. Powder is gradually added to the oil in small portions and thoroughly mixed with it. When the mixture acquires a pasty consistency and does not stick to the walls and bottom of the porcelain cup, it is placed in a metal cup, smoothing with a knife or spatula flush with the edges. A metal cup with the mixture is placed on the stand of the Vicat device, the pestle is brought to the surface of the mixture and the position of the pointer on the scale is marked. Then the pestle is raised above the surface of the mixture by 20 mm and the rod with the weight and the pestle is allowed to freely immerse in the mixture for 5 s, after which the position of the pointer on the scale is noted and the immersion depth is determined, which should be 8 mm.

If the resulting immersion is greater than 8 mm, place the mixture back into the porcelain cup, add the powder, mix and repeat the test.

If the immersion value obtained is less than 8 mm, make a new powder-oil mixture using less than the original amount of powder and repeat the test again.

7.8.3 Treatment of test results

The index of bitumen capacity PB, g, is calculated by the formula

Where T - weight of the weighed portion of the powder, g;

T 1 is the mass of the powder remaining after the test, g;

r is the true density of the powder, g/cm 3 ;

100 - powder volume, cm 3 .

The result of each test is calculated to the nearest whole number. The absolute allowable discrepancy between the results of parallel determinations should not exceed 2 g.

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

The bitumen content of the powder is calculated as the arithmetic mean of the results of two parallel tests.

7.9 Determination of the hydrophobicity of the activated powder

The essence of the method is to evaluate the ability of the powder not to be wetted by water.

7.9.1 Means of control (measurements), equipment, materials, auxiliary devices

Laboratory scales of the 4th accuracy class according to GOST 24104.

Glass glass with a capacity of 500 - 800 ml in accordance with GOST 23932.

7.9.2 The procedure for preparing and conducting a test

The powder is prepared for the test according to 7.1.4.

7.9.3 Determination of hydrophobicity by free float method

The glass beaker is filled with distilled water 50 mm below the rim. About 2 g of powder is weighed from the prepared sample, it is poured from the spatula onto the surface of the water by lightly tapping the spatula on the edge of the glass.

A glass of water and powder is left alone for 24 hours.

The powder is considered hydrophobic if it does not settle to the bottom within 24 hours and no visible wetting of the powder with water is observed.

7.9.4 Determination of hydrophobicity by the accelerated method

A glass beaker is filled with distilled water 50 mm below the edge and placed at eye level (for ease of observation) on a flat surface (table or stand), previously covered with a sheet of paper, on which two parallel lines are drawn at a distance of 50 mm from each other.

The glass is set in such a way that one of the lines on the paper is tangent to the base of the glass.

About 0.5 g is weighed from the prepared powder sample and poured from the spatula onto the surface of the water by lightly tapping the spatula on the edge of the glass. The glass is moved from one line to another and back.

A cycle that includes two movements (100 mm path) must be completed in 1 second smoothly, without jerks.

The powder is considered hydrophobic if, after 10 cycles of moving the glass, even light ("foggy") powder flows from the water surface to the bottom of the glass are not observed.

7.10 Moisture determination

The essence of the method is to determine the moisture content in the powder.

7.10.1 Means of control (measurements), equipment, auxiliary devices

Laboratory scales of the 4th accuracy class according to GOST 24104.

Drying cabinet.

Porcelain cups with a diameter of 10-15 cm according to GOST 9147.

Desiccator with anhydrous calcium chloride according to GOST 450.

7.10.2 Procedure for preparing and conducting a test

The washed cups are placed for at least 30 minutes in an oven at a temperature of (105 ± 5) ° C, then cooled in a desiccator to room temperature.

The test is carried out in two cups. Each cup prepared as above is weighed. Two portions of (50 ± 5) g are taken from a powder sample and poured into cups, filling them evenly without compaction. Cups with powder are weighed and placed in an oven with a temperature of (105 ± 5) ° C, where the powder is dried to a constant weight, to establish which the cups with powder are weighed every hour, pre-cooling to room temperature in a desiccator with anhydrous calcium chloride.

7.10.3 Handling test results

Powder Moisture W, % by mass, calculated by the formula

W=, (11)

Where T - weight of the cup with powder before drying, g;

t 1 - weight of cup with powder after drying, g;

T 2 - mass of the cup, g.

The result of each test is calculated to the first decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 0.2%.

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

The moisture content of the powder is calculated as the arithmetic mean of the results of two parallel tests.

7.11 Determination of the content of activating substances in the activated powder

7.11.1 Colorimetric method

The essence of the method is to determine the content of the activating agent by comparing the color of the solvent with which the powder is processed with the color of the standards.

This method is unsuitable in the case of application for the activation of powders of materials that do not color the solvent.

7.11.1.1 Means of control (measurements), equipment, materials, auxiliary devices

Laboratory scales of the 4th accuracy class according to GOST 24104.

The centrifuge is laboratory.

Graduated cylinder with a capacity of 10 ml.

7.11.1.2 How to prepare for a test

In a laboratory mill, 8 samples of activated powders are prepared, 2000 g each, with an activating substance content of 0.25, 0.50, 0.75, 1.0, 1.25, 1.50, 1.75 and 2.0% of the mass of the mineral parts.

Each prepared sample is thoroughly mixed, reduced by quartering to 125 g, 1 g of powder is weighed from it and poured into clean dry test tubes, into which then 10 ml of the solvent is poured. The tubes are closed with cork stoppers, shaken thoroughly for 1 min and centrifuged for 3 min at a centrifuge speed of 3000-5000 rpm.

In the absence of a centrifuge, the tubes after shaking are left alone for 24 hours.

Then, the upper end of the tube, together with the stopper, is waxed, the tubes are labeled with the content of the activating agent in the powder and placed in a rack.

The color of the solution in the test tube serves as a reference for determining the content of the activating agent in the powder.

7.11.1.3 Test procedure

A powder sample weighing 500 g is thoroughly mixed, reduced by quartering to 50 - 100 g, 1 g of powder is weighed from it, poured into a test tube and treated with a solvent, as indicated in 7.11.1.2.

7.11.1.4 Processing of test results

The color of the solution obtained in the test tube is compared with the standards prepared according to 7.11.1.2, and the content of the activating agent in the powder is determined.

7.11.2 Burn-in method

GOST 23932.

Drying cabinet.

The bath is sandy.

7.12.2 The procedure for preparing and conducting a test

The powder is prepared for the test according to 7.1.4.

From the prepared sample, take a sample weighing about 50 g, pour it into a conical flask and pour 100 ml of distilled water. A reflux condenser is fixed on the flask. The contents of the flask are heated to boiling in a sand bath, boiled for one hour, and then cooled to room temperature. The resulting aqueous extract is poured into the second flask through a filter pre-moistened with distilled water. The residue in the first flask is washed with distilled water in portions of 20 - 25 ml and also poured through the filter into the second flask. From the second flask, the filtrate is transferred in parts into a glass beaker, previously dried to constant weight and weighed, and water is evaporated from it on a sand bath. After the aqueous extract transferred to the beaker evaporates to a volume of about 5 ml, the residue is dried to constant weight in an oven at a temperature of (105 ± 5) ° C and, after cooling in a desiccator, is weighed.

7.12.3 Processing of test results

A =, (12)

Where T - weight of sample of mineral powder, g;

t 1 - weight of the cup with dry residue, g;

t 2 - cup weight, g

The result of each test is calculated to the second decimal place after the decimal point. The absolute allowable discrepancy between the results of parallel determinations should not exceed 0.03%.

If the absolute allowable difference between the results of the determinations is exceeded, the test should be repeated until the allowable difference is obtained.

7.14 Losses during ignition of fly ash and ash and slag mixtures of thermal power plants are determined according to GOST 11022.

7.15 The value of the total specific effective activity of natural radionuclides is determined according to GOST 30108.

8 Transport and storage

8.1 The powder is transported in cement trucks, containers, closed bunker cars or packed in multilayer paper or polyethylene bags in ordinary closed cars.

For intra-factory transportation of the powder, pneumatic transport, as well as conveyors, conveyors and screws, closed with casings, should be used.

8.2 Powders are stored in bunkers or silos, and powder packed in bags is stored in closed warehouses.

When storing powders in silos, measures should be taken against their caking - pumping, aeration, etc.

9 Manufacturer's warranties

9.1 The manufacturer guarantees the compliance of the powder with the requirements of this standard, subject to the conditions of transportation and storage.

Scope of mineral powders

Mineral Powder Grade	Type of mineral powder	Application area
	Activated and non-activated from carbonate rocks	Asphalt-concrete mixes, crushed stone and mastic according to GOST 31015 grade III Rolled section calibrated, with a special surface finish from high-quality carbon structural steel. General specifications Distilled water. Specifications Solid mineral fuel. Ash content determination methods Industrial oils. Specifications Drinking water. General requirements for the organization and methods of quality control Note - When using this standard, it is advisable to check the validity of the reference standards according to the "State Standards" index, compiled as of January 1 of the current year, and according to the corresponding indexes published in the current year. If the reference document is replaced (modified), then when using this standard, you should be guided by the replaced (modified) standard. If the referenced document is canceled without replacement, the provision in which the link to it is given applies to the extent that this link is not affected. Keywords: mineral powder, activated powder, non-activated powder, activating mixture, carbonate rock, siliceous rock, industrial waste

Mineral powder grade MP-1 is a powdered filler obtained as a result of fine grinding of carbonate mineral rocks - calcium carbonate to a fraction of 300 micrometers. Mineral powder: material obtained from the grinding of rocks or industrial solid waste. Carbonate rock: Sedimentary rock composed of more than 50% of one or more carbonate minerals, such as limestones, marbles, dolomites and intermediate varieties between them.

What is non-activated mineral powder?

MP-1 for asphalt concrete and organo-mineral mixtures is a filler obtained by crushing, grinding and subsequent drying of carbonate minerals.

To learn more

UZSM produces MP-1 based on calcium carbonate - ground marble. Mineral powder MP-1 is one of the most essential components of the asphalt mix. Mineral powder MP-1 adds the necessary elasticity to asphalt concrete, increasing its strength and wear resistance.

The developed surface of such a component of asphalt concrete as mineral powder adsorbs most of the bitumen, increases the ability of asphalt concrete to deform, thereby significantly improving the quality of the road surface, prolonging its service life and providing significant savings in operation. Increases the density and uniformity of asphalt concrete.

Application area

The main field of application of mineral powder is the production of asphalt at asphalt concrete plants, where mineral powder serves as a filler that increases the structure, viscosity and adhesiveness of bitumen, improves plasticity, elasticity, and strength of the asphalt mass, which ultimately leads to an increase in the durability of the road surface.

To learn more

Strict modern requirements for the quality of roads on the part of the state necessitate the use of higher quality components, in particular mineral powder, for the production of asphalt mixtures.

Of all the structural elements of the road, the top layer of asphalt concrete pavement works in the most difficult conditions. On the one hand, this is the influence of static effects and dynamic transport loads and the shear, tensile and bending forces associated with them, leading to stresses in the coating. A material with a sufficient margin of safety can withstand such stresses. The increasing traffic intensity every year poses an urgent task of creating a durable asphalt concrete pavement that is resistant to the action of variable in magnitude, speed and frequency of application, loads from moving vehicles in any critical periods.

Here the influence of high-quality mineral powders on the properties of asphalt concrete should manifest itself. Strengthening the structured dispersed system bitumen - mineral powder, increasing the density and strength of the asphalt concrete mass improves the resistance to deformation and other transport and operational indicators of road surfaces.

On the other hand, climatic conditions are an important factor affecting the roadway. Under the influence of atmospheric oxygen, solar radiation, temperature changes, atmospheric precipitation, irreversible physical and chemical processes occur in asphalt concrete, leading to aging, resulting in a decrease in its deformability and corrosion resistance.

When exposed to low temperatures, a brittle rupture of the roadway is possible, leading to the appearance of cracks on its surface, and then potholes as a result of the expansion of frozen water that has entered the asphalt pavement through the cracks. High-quality mineral powder significantly improves the most important physical and mechanical properties of asphalt concrete: it reduces water permeability or water saturation, increases frost resistance, which significantly slows down the process of cracking.

Production of mineral powder MP-1

Mineral powder MP-1 is manufactured according to the GOST R 52129-2003 regulatory document and is used in the production of asphalt concrete mixes, dry mixes, in the chemical, metallurgical and glass industries, as well as UZSM produces Mineral powder with increased consumer requirements for elasticity and softness TU 5716-004 -91892010-2011.

Mineral road powder

The construction of roads and large highways in Russia and neighboring countries is gaining momentum due to the availability of mineral powder MP-1 R GOST 52129-2003. Mineral powder prevents moisture penetration, reduces water saturation of the coating, which has a positive effect on the service life. The priority is the possibility of using it in asphalt concrete, where clay particles are present, this can significantly reduce costs in the construction of roads.

Types of mineral powder MP-1

Mineral powder is divided into several types: activated (completely hydrophobic MP-1A) and non-activated (non-hydrophobic MP-1)

Varieties of mineral powder

It is also customary to divide mineral powder into grades: grade 1 - obtained by grinding carbonate rocks with an exact fraction of 300-315 microns. Grade 2 - Obtained by processing waste from the main production of carbonate rocks of a fraction of 300-800 microns with inclusions. The chemical composition of the varieties is completely identical, however, the cost of the 1st grade is much higher when the 2nd grade is supplied at the price of sand.

To learn more

When choosing a mineral powder, one should take into account the type of asphalt concrete in which it will be used, since it varies greatly in terms of such parameters as grain size, hydrophobicity, porosity, swelling, and some others. Mineral powder is used in the production of asphalt concrete mixtures of various categories. Unlike other raw materials, it has undeniable advantages: high hydrophobicity and bitumen capacity, which allows it to be evenly distributed in bitumen. The list of benefits of mineral powder does not end there.

Packing of mineral powders MP-1

In our production, mineral powder undergoes a process of high-tech additional drying. For protection against moisture and ease of loading and use, mineral powder is packaged in "big bags" with a polypropylene insert weighing 1000 kg, and in bulk machines, which simplifies use in production. All our products are stored in a covered warehouse, which is especially important in the Ural climate. We supply mineral powder on the territory of the Russian Federation and the CIS. Mineral powder can be bought in Yekaterinburg, Chelyabinsk, Neftekamsk.

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