Improved granules to melt accumulated snow and ice and the method of their manufacture

 

Offered granules to melt accumulated snow and ice, made from a compressed mixture of salts of alkaline and/or alkaline earth metals comprising from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal. The first salt is a hygroscopic salt, where the sum of the components is 100% dry matter. The compressed mixture is prepared by: mixing the first and second salts, where the second salt is a saturated salt solution; pressing the mixture and granulating the pressed mixture. A method for making granules. Proposed options granules to melt accumulated snow and ice. The granules according to the invention have improved mechanical properties and not easily crushed to powder when subjected to mechanical stress during transport and storage. 6 N. and 15 C.p. f-crystals, 4 Il.

The SCOPE of the INVENTION

The present invention generally relates to granules for Astapova sitsa to the granules, obtained from compacted mixtures of salts of alkaline and/or alkaline earth metals, and to methods for producing such granules.

BACKGROUND of the INVENTION

Previously known products for melting snow and ice include hygroscopic salts such as calcium chloride and magnesium chloride, rock salt (sodium chloride), fertilizers such as potassium chloride and urea, a mixture of several salts and non-slip aggregates, such as sand, slag, and calcined adsorbent of hard-shelled land.

Such previously known products, which are incapable of melting snow and ice in their solid form, must first form a solid solution or brine. The brine is used to lower the freezing point of water and to dissolve or melt the snow and ice when contact is made within such time that it becomes diluted to a concentration at which its freezing temperature rises to the temperature of freezing water.

As should be readily understandable to experts, the speed or effectiveness of such previously known products depends, in part, on the time required for the formation brine. In order to reduce the transformation time of the brine, hygroscopic salts (e.g. calcium chloride, chloride Maga prepared in the form of dry mixtures and agglomerates. Such mixtures are also prepared by spraying a liquid solution of calcium chloride and/or magnesium chloride in solid sodium chloride crystals.

Dry mixtures of salts, including calcium chloride and sodium chloride, tend to be the least efficient products from the salt mixtures separation of these components during transport. As is well known, calcium chloride has a large exothermic effect dissolution, whereas the sodium chloride has an endothermic heat effect dissolution. If so, the dissolution of sodium chloride will only occur with the absorption of heat, and therefore is dependent on the heat generated by the dissolution of calcium chloride. If these components are not in direct contact, the rate of dissolution of sodium chloride decreases, making the mixture less effective.

The crystals of sodium chloride and agglomerated mixture of salts coated mentioned above, typically do not contain sufficient quantities of calcium chloride and/or magnesium chloride in order to achieve an acceptable speed of dissolution or cause complete dissolution of the sodium chloride crystals.

Among the attempts of previous practice to improve the efficiency of the products for restaple orida sodium. It was reported that the mix was produced using granules of anhydrous calcium chloride (94% CaCl2//4% other salts//2% N2About) and particles of 100 mesh sodium chloride (92% NaCl//8% 38% (wt.) solution of CaCl2). The total amount of free water in the granules of anhydrous calcium chloride and calcium chloride was 2%.

Although this granular product contained a sufficient amount of calcium chloride to cause dissolution of the sodium chloride component with an acceptable speed of dissolution, it is expensive to manufacture and is easily converted into powder when subjected to mechanical stress during transport and storage.

Another attempt to improve the performance of existing products for melting snow and ice are described in U.S. patent No. 3906140, issued to Charles E. Caps. This patent disclosed a compound tablets obtained by contacting the larger or coarser particles salts such as CaCl2with more fine particles of salt, such as NaCl, in the presence of viscous composite binder salt solution substantially saturated finer particles of salt and partially saturated coarser particles of salt. Coarser and finer particles

It is reported that the composite binder saline desirable in the case when any leaching or dissolution of NaCl would have led to a decrease in the size of the coarser particles CaCl2and thereby to reduce differences in the sizes of these particles, and when the viscosity of the binder solution contributes to the pelletizing of these mixtures (see column 2, lines 57-64 patent ‘140).

However, the use of composite binder salt solution leads to the introduction in the process of manufacturing these tablets additional stages, and thereby adversely affects the economic performance of this process.

Accordingly, the main aim of the present invention is to eliminate the above-noted disadvantages of the prior art.

More specifically, the purpose of the present invention is the provision of granules to melt accumulated snow and ice, which have improved mechanical properties, being less expensive to manufacture.

Another objective of the present invention is the provision of a method of preparation of the granules to melt accumulated snow and ice, which is effective and efficient and serves to improve the mechanical properties of the final granulated composition.

Exeba.

Description of the INVENTION

The present invention provides granules to melt accumulated snow and ice, made from a compressed mixture of salts of alkaline and/or alkaline earth metals, where the mixture comprises from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal, where at least the first salt is a hygroscopic salt, and where the sum of the components is 100% dry matter.

The present invention also provides a method of producing such granules, which includes:

(a) mixing at least two salts of alkaline and/or alkaline earth metals, where the first salt is an anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution with a content of free water in the range of from about 6 to about 10 wt.% calculated on the total weight of the saturated salt solution;

(b) compressing the mixture; and

(c) granulating the pressed mixture.

The present invention further proposes granules and other features and advantages of the present invention will be clearer from the following description and the accompanying drawings.

Unless otherwise specified, all technical and scientific terms used herein have the same meaning, which is usually easily understood by a typical specialist to whom addressed this invention. Everything mentioned here publications, patent applications, patents, and other sources are included in the description by reference in its entirety. In case of conflict, the present application, including definitions, will be decisive. In addition, the materials, methods and examples are illustrative only and should not be construed as restrictive.

Brief description of drawings

Fig.1 is a schematic process flow diagram describing the main features of the method for the manufacture of one example of the granules to melt accumulated snow and ice according to the present invention.

Fig.2 is a cross-sectional, side view of a preferred variant implementation of the mixer/reactor, used for the manufacture of one example of the granules to melt accumulated snow and ice according to the present invention.

Fig.3 is a graph describing the fusing ability of the preferred embodiment of the present invention and several previously known products.

Fig.4 Priya and several previously known products.

A detailed description of the preferred option implementation

Granules to melt accumulated snow and ice according to the present invention have improved mechanical properties in and of themselves are not easily crushed to powder when subjected to mechanical stress during transport and storage. The granules according to the invention are effective at temperatures as low as -20°C, and penetrate through the ice to the underlying surfaces than some previously known defrosters. In addition, preliminary studies have shown that the granules may initially act as abrasives, reducing the risk of contact with surfaces covered with ice or snow.

In the General case the granules to melt accumulated snow and ice according to the invention is prepared from a compacted mixture of at least two salts of alkaline and/or alkaline earth metals. More specifically, the granules according to the invention is prepared from a compacted mixture comprising from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight pressed the Oh hygroscopic salt, and where the sum of the components is 100% dry matter. As mentioned above, the present invention was used one or more hygroscopic salts in order to facilitate the formation of liquid brine.

By the present invention it was found that for compacted granular salt calcium chloride/sodium chloride calcium chloride component must be present in an amount greater than 15% or equal to 15% calculated on the total dry weight of the pressed mixture, in order to cause rapid and complete dissolution of the sodium chloride component. As should be easily understood, relatively low amount of calcium chloride used in granular mixtures according to the invention make such mixtures are more efficient or profitable.

Preferably, salts of alkali and alkaline earth metals are a halide salt selected from the group comprising calcium chloride, magnesium chloride, potassium chloride and sodium chloride. More preferably, the first salt is alkaline and/or alkaline earth metal chosen from the group comprising calcium chloride and magnesium chloride, while the second salt is alkaline and/or alkaline earth metal chosen from the group comprising potassium chloride and Yes according to the present invention is prepared from the pressed mixture, comprising from about 20 to about 25% by dry weight (most preferably, from about 20 to about 22% by dry weight) calculated on the total dry weight of the pressed mixture of calcium chloride and from about 80 to about 75% by dry weight (most preferably, from about 80 to about 78% by dry weight) calculated on the total dry weight of the pressed mixture of sodium chloride.

Granules to melt accumulated snow and ice according to the invention can with a beneficial effect to contain other additives, provided that any such additives do not render harmful influence on the desired properties of the granules. For example, the granules according to the invention can contain absorbents, abrasives, agents, prevent caking, dyes, corrosion inhibitors, preservatives and/or surfactants.

In a preferred embodiment of the present invention, the granules contain an effective amount of one or more corrosion inhibitors. Suitable corrosion inhibitors include, but are not limited to, monolatrist phosphate, sodium nitrate and mixtures thereof.

In an even more preferred embodiment, pellets made from compressed mixture comprising from about 15 to primer the weight of the pressed mixture of calcium chloride, from about 55 to about 85% by dry weight (more preferably, from about 75 to about 80% by dry weight) calculated on the total dry weight of the pressed mixture of sodium chloride and from about 1.0 to about 3.0 percent by dry weight (more preferably from about 1.15 to about 2.0 for the dry weight) calculated on the total dry weight of the pressed mixture of monetarypolicy.

The average particle size of the granules according to the invention preferably lies in the range of from about 2 to about 10 mm (more preferably, from about 2 to about 8 mm), while the bulk density is preferably lies in the range from approximately 0.88 to about 1.04 g/cm3.

Granules to melt accumulated snow and ice according to the present invention is prepared by mixing salts of alkaline and/or alkaline earth metals, molding the mixture and granulating the pressed mixture. More specifically, the granules according to the invention are prepared:

(a) mixing at least two salts of alkaline and/or alkaline earth metals, where the first salt is an anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution having a content of free water in the range of from about 6 to about 10 wt.% (predpochteniem mixture; and

(c) granulating the pressed mixture.

The term "content of free water" as it is used here, means the total amount of unbound water present in the solution, and it is determined in accordance with the standard test method of The American Society for Testing and Materials (ASTM) No E 203-01.

By the present invention discovered that a mixture prepared from saturated salt solutions having a content of free water from about 6 to about 10 wt.% calculated on the total weight of the saturated salt solution had the best compaction, resulting in firmer and more impact-resistant granules. With specific regard to mixtures of calcium chloride/sodium chloride, such mixtures should contain 20% by dry weight, or more, calculated on the total dry weight of the mixture of calcium chloride (dihydrate), which provides the linking components, leading to improved sealability and, consequently, to a more solid granules. However, a mixture prepared from saturated salt solutions having a content of free water is more than 10 wt.%, tend to form granules, which are less effective from the standpoint of melting snow and ice, whereas granules containing less than 3 wt.% svobodna implementation granules are prepared by mixing the calcium chloride in the form of particles with a saturated solution of sodium chloride, pressing the mixture and granulating the pressed mixture. In accordance with this preferred embodiment and as best shown in Fig.1, the calcium chloride in the form of particles and a saturated solution of sodium chloride send along the lines of the metered streams 10, 12 in the mixer/reactor 14 and is stirred or shaken at ambient temperature or room temperature (i.e. from about 20 to about 25°C.) over a period of time from about 20 to about 30 minutes.

The term "a saturated solution", as used here, means a solution containing at least about 26 wt.% of calcium chloride calculated on the total weight of the solution.

During the stage of mixing in the mixer/reactor 14 can be introduced additives such as dyes, corrosion inhibitors) along the line of feed stream 16.

In a more preferred embodiment, aqueous suspensions or solutions of such additives sprayed on the mixture in the mixer/reactor 14 by using, for example, the spray nozzle.

In an even more preferred embodiment, an aqueous solution containing from about 19 to about 38 wt.% calculated on the total weight of the aqueous solution of monetarypolicy add to the mixer/RLE/reactor 14, direct line 18 in press roller 20 (for example, in a press equipped with a smooth or ribbed rollers), which makes the mixture into a sheet. Preferably, the pressure rollers in the press 20, does not exceed 13.1 MPa. Molded sheet is directed along the line 22 in Drautal/granulator 24, which crushes and razmarivaet sheet in the granulated product. Note that the press roller 20 and Drautal/granulator 24 may be included in one item of equipment so that the stages of pressing and crushing/grinding are carried out sequentially, but in one device.

The granular product is formed in drobile-granulator 24, is directed through line 26 into the sieve 28 (e.g., vibrating sieve), which contains a series of sieves. The granular product is separated into a fraction of a larger size, the product fraction and the fraction of smaller size, i.e. a small thing. The fraction of larger size are removed through line 30 and is served in recycling in the granulator 32 for additional size reduction. Can be used as a second, separate granulator. Then the fraction of reduced size guide lines 34 and 26 in the sieve 28. The fraction of smaller size served in recycling lines 36 and 18 in press 20. The product fraction of napravlyayuthaya, the output of a bolt 28 in the quality of the product has an average particle size in the range of from about 2 to about 10 mm (preferably, from about 2 to about 8 mm) and, preferably, stored in a cool, dry place.

In the preferred embodiment, as best shown in Fig.2, the mixer/reactor 14 includes: (a) a cylindrical casing 40; (b) a shaft 42, which is driven by a motor and gearbox (not shown) and the rotation of which is supported by bearings 44; and (C) the number of elements or mixing blades 46, which is attached to the shaft 42 radially spaced elements 48.

Ingredients injected into the mixer/reactor 14 through inlet port 50, while additives such as dyes, corrosion inhibitors) can be injected into the mixer/reactor 14 when using the spray nozzle 52. The mixer/reactor 14 is inclined (for example, 10° from the horizontal axis), allowing the mixture to move under gravity to the outlet fitting 54.

As indicated above, the granules to melt accumulated snow and ice according to the present invention have improved mechanical properties. The granules according to the invention are solid and shock-resistant and not easily crushed to poro according to the invention with salts of sodium chloride, calcium and magnesium granules according to the invention showed the best full fusing ability. More specifically, Fig.3 is a diagram describing the fusing ability of the preferred alternative implementation of the present invention (designated as HKNH), sodium chloride, 98% of calcium chloride 77% calcium chloride and hydrated magnesium chloride. The term "melting capacity" means the number of grams of melted ice per gram of product at varying temperatures (shown on the horizontal axis) for 30 minutes.

For this test distilled water was boiled, cooled and then placed in a Plexiglas cell with vertical walls, each cell had a total surface area of 230 cm2. Then the cuvette was placed in the freezer for 15 hours, was taken out and the ice surface in each cell was aligned contact surface with aluminum disc using a circular motion. Then the cuvette was returned to the freezer to re-freeze any surface water. Then they measured and cooled sample of 1.0 g of each test sample. The cuvette was removed from the freezer and measured and cooled the samples evenly distributed over the ice in half pans, and ka is a ditch, measured at intervals of 15, 30, 45, 60 and 120 minutes. As shown in Fig.3, the granules to melt accumulated snow and ice according to the present invention have a higher full fusing ability than the other tested products, at lower temperatures.

Fig.4 is a chart showing the penetration of the ice for 60 minutes to pellet according to the invention and for the chloride salts of sodium, calcium and magnesium, which have been described above. The term "penetration of ice" means the depth of penetration of the product placed on the surface of the ice filled cavity.

For this test used a device that contains many vertical cavities with a diameter of 6 mm Distilled water was boiled, cooled and then an equal number was introduced by syringe into each cavity of each device. Then the device was placed in the freezer and the water froze without air bubbles. After freezing the so-called "ice cap", which was formed on the surface of each cavity were removed using an aluminum plate, and the device for one hour and returned to the freezer. Then they measured and cooled a portion of 0.04 g of each test substance. Devices were removed from the freezer and autoready tested sample. The depth of penetration caused by each test sample was measured in intervals of 15, 30, 45, 60 and 120 minutes. If there was non-uniform penetration, measured maximum/minimum values and recorded an average value. As shown in Fig.4, the pellets to melt accumulated snow and ice according to the present invention showed either increased penetration of ice, or the same penetration compared with other products.

The granules according to the invention, as noted above, preferably used one or more corrosion inhibitors, uniformly distributed on each granule. There are a number of corrosion tests developed by such organizations as the American Society for Testing and Materials (ASTM) and the National Association of Corrosion Engineers (NACE). These tests can be quite complex due to the fact that the test conditions and the metals should be close to those that exist in practice.

The corrosion tests were performed with the granules to melt accumulated snow and ice according to the present invention in accordance with standard NACE Standard TM-01-69 (revised 1976), modified Pacific Northwest States (PNS). PNS modified the methodology of this test corrosion so that the testing method used 30 ml of 3% solution of the test product (or melting snow and ice, to be acceptable according to the standard NACE, must have a value of corrosion, at least 70% less than that of sodium chloride. Therefore, if the corrosion rate for dilute salt solutions (3 wt.%) for metals based on the iron ranges from 17 to 50 mils per year (MPY), the acceptable standard for corrosion resistant product for melting snow and ice must be between 5,10 and 15.00 MPY.

In accordance with the above method of testing metal samples or coupons were cleaned, dried and weighed.

Then coupons alternately immersed in a solution of brine (10 minutes) and were removed from the brine solution and kept in air (50 minutes) within 72 hours. Next, the coupons were examined and weighed in order to determine how much metal has been lost or corroded. Coupons were a 1/2-inch flat plate of mild steel (approximately 1,38 inch0.56 inch0.11 inch), having a density of about a 7.85 g/cm3.

The results of corrosion tests obtained for pellets to melt accumulated snow and ice of the present invention, showed a corrosion rate which is less than or equal to 10 MPY, preferably, less than or ravnos transport, and, therefore, a low rate of corrosion is extremely beneficial and desirable.

Although this invention has been presented and described in relation to its specific implementation options, specialists should understand that various changes in form and details may be made without deviating from the spirit of the claimed invention.

Proceeding from the described thus of the invention applicants propose the following claims.

Claims

1. The compressed mixture of salts of alkaline and/or alkaline earth metals, where the mixture comprises from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal, where at least the first salt is a hygroscopic salt, where the sum of the components is 100% dry matter, and where the compressed mixture is prepared by mixing the first and second salts, where the second salt is a saturated saline solution and pressing the mixture.

2. Pressed Sz group of calcium chloride and magnesium chloride, and where the second salt of alkali or alkaline earth metal is a halide salt selected from the group of potassium chloride and sodium chloride.

3. The compressed mixture under item 2, where the first salt of alkali or alkaline earth metal is calcium chloride, and where the second salt of alkali or alkaline earth metal is sodium chloride.

4. The compressed mixture under item 3, which comprises from about 20 to about 25% by dry weight calculated on the total dry weight of the pressed mixture of calcium chloride and from about 80 to about 75% by dry weight calculated on the total dry weight of the pressed mixture of sodium chloride.

5. The compressed mixture under item 4, which comprises from about 20 to about 22% by dry weight calculated on the total dry weight of the pressed mixture of calcium chloride and from about 80 to about 78% by dry weight calculated on the total dry weight of the pressed mixture of sodium chloride.

6. The compressed mixture under item 1, which additionally contains an effective amount of one or more corrosion inhibitors.

7. The compressed mixture under item 6, where one or more corrosion inhibitors are selected from the group of monetarypolicy, monoammonium phosphate, sodium nitrate and mixtures thereof.

8. Presspresident mixture under item 8, which additionally contains from about 1.0 to about 3.0 percent by dry weight calculated on the total dry weight of the pressed mixture of monetarypolicy.

10. Granules to melt accumulated snow and ice, made from a compressed mixture of salts of alkaline and/or alkaline earth metals, where the mixture comprises from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal, where at least the first salt is a hygroscopic salt, where the sum of the components is 100% dry matter and where the compressed mixture is prepared by mixing the first and second salts, where the second salt is a saturated saline solution, molding the mixture, and pelletizing the pressed mixture.

11. Granules to melt accumulated snow and ice on p. 10, where the granules have an average particle size in the range of from about 2 to about 10 mm and a bulk density in the range from approximately 0.88 to about 1.04 g/cm3.

12. Granules to melt accumulated snow and ice on p. 10, which dataplane snow and ice on p. 12, which show the corrosion rate less than or equal to 10 mil/year when tested according to NACE Standard TM-01-69 (revised edition 1976), modification of PNS.

14. Granules to melt accumulated snow and ice on p. 13, which show the corrosion rate less than or equal to 8 mil/year when tested according to NACE Standard TM-01-69 (revised edition 1976), modification of PNS.

15. A method of manufacturing granules to melt accumulated snow and ice, comprising (a) mixing at least two salts of alkaline and/or alkaline earth metals, where the first salt is an anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution with a content of free water in the range of from about 6 to about 10 wt.% calculated on the total weight of the saturated salt solution; (b) compressing the mixture; and (c) granulating the pressed mixture.

16. The method according to p. 15, where saturated salt solution has a content of free water in the range of from about 6 to about 7 wt.% calculated on the total weight of the saturated salt solution.

17. The method according to p. 15, in which one or more corrosion inhibitors selected from the group of monetarypolicy, monoammonium phosphate, sodium nitrate and mixtures thereof, is mixed with at least two of malorosii are monolatrist.

19. Granules to melt accumulated snow and ice, made from a compressed mixture comprising from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal, and, optionally, an effective amount of one or more corrosion inhibitors, where at least the first salt is a hygroscopic salt, in which the sum of the components is 100% of the dry weight, and where the compressed mixture is prepared (a) by mixing salts and, optionally, one or more corrosion inhibitors, where the first salt is in the form of anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution with a content of free water in the range of from about 6 to about 10 wt.% calculated on the total weight of the saturated salt solution; (b) compressing the mixture; and (c) granulating the pressed mixture.

20. Granules to melt accumulated snow and ice, made from a compressed mixture comprising from about 20 to about 25% by dry weight in the calculation E on the total dry weight of the pressed mixture of sodium chloride, in which the sum of the components is 100% of the dry mass, and where the compressed mixture is prepared (a) by mixing salts, where the calcium chloride is in the form of anhydrous hygroscopic salt, and where the sodium chloride is in the form of saturated salt solution with a content of free water in the range of from about 6 to about 10 wt.% calculated on the total weight of the saturated salt solution; (b) compressing the mixture; and (c) granulating the pressed mixture.

21. Granules to melt accumulated snow and ice, made from a compressed mixture comprising from about 20 to about 25% by dry weight calculated on the total dry weight of the pressed mixture of calcium chloride and from about 80 to about 75% by dry weight calculated on the total dry weight of the pressed mixture of sodium chloride, and from about 1.0 to about 3.0 percent by dry weight calculated on the total dry weight of the pressed mixture of monetarypolicy, in which the sum of the components is 100% of the dry mass, and where the compressed mixture is prepared (a) by mixing salts and Mononitrate, where calcium chloride is in the form of anhydrous hygroscopic salts, where the sodium chloride is in the form of saturated salt solution with a content of free water in the range of from about 6 dvid aqueous solution, containing from 19 to 38 wt.% calculated on the total weight of the aqueous solution of monetarypolicy; (b) compressing the mixture; and (c) granulating the pressed mixture.

 

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EFFECT: improved and valuable properties of preparation.

FIELD: special reagents.

SUBSTANCE: invention relates to substances for applying on surface to prevent or diminish adhering ice, mist or water on it, for prevention of icing, in particular, to anti-glaze of ice reagents. The composite comprises the following components, wt.-%: calcium chloride, 25-32; urea, 2-7; sodium nitrite, 0.03-1.0, and water, the balance. Invention provides preparing the composite harmless for environment that doesn't show harmful effect on environment, doesn't corrode road coatings, and inhibits corrosion of metals. Agent shows economy and high effectiveness.

EFFECT: improved and valuable properties of reagent.

2 cl, 1 tbl

FIELD: road-transport industry.

SUBSTANCE: method includes applying substance on asphalt-concrete mixture. As substance silicon-organic modifier is used, loss of which at 1 m2 of area of pre-placed on road asphalt-concrete mixture at temperature 80-100°C is no less than 0,3-0,5 kg. After applying modifier, asphalt-concrete mixture is rolled.

EFFECT: higher efficiency, no corrosive effect on metals, effective at temperature above -20°C.

2 cl, 3 tbl, 3 ex, 1 dwg

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