WO2012074433A1

WO2012074433A1 - Modifying composition, process for producing same, and use of said composition in asphalt concrete road surfaces

Info

Publication number: WO2012074433A1
Application number: PCT/RU2011/000654
Authority: WO
Inventors: Юрий Витальевич АЗИКОВ; Рудольф Абрамович ГОРЕЛИК; Владимир Николаевич БАЛЫБЕРДИН; Белла Матвеевна СЛЕПАЯ; Юлия Алексеевна ИСКРИНА
Original assignee: Azikov Yury Vitalievich; Gorelik R A; Balyberdin Vladimir Nikolaevich; Slepaya Bella Matveevna; Iskrina Yulia Alexeevna
Priority date: 2010-11-30
Filing date: 2011-08-29
Publication date: 2012-06-07
Also published as: RU2458083C1; RU2010149038A

Abstract

The present invention relates to the production of a modifying composition, a process for producing same and the use of said composition in asphalt concrete road surfaces in different climatic zones. The modifying composition comprises from 60 to 75 mass% of active rubber powder, the product resulting from processing of tyres and/or industrial rubber articles, with a particle size of no more than 1 mm, a filler in the form of ground mica and/or diatomaceous earth, an adhesive, and a crosslinking additive, wherein the active rubber powder is a rubber powder with a developed specific surface area which is produced by thermomechanical grinding, or a rubber powder which is chemically activated by petroleum oil, or a mixture thereof. The technical result consists in the use of rubber powder with a low specific surface area and also in improving the use characteristics of asphalt concrete surfaces.

Description

MODIFIING COMPOSITION, METHOD FOR ITS PREPARATION AND ITS APPLICATION IN ASPHALT CONCRETE ROAD COVERINGS

The invention relates to road-building materials, in particular to the modifying composition, and the method of their production and can be used on the device coating roads, airfields, bridges in different climatic zones.

The federal target program "Development of the Transport System of Russia" determines the need for the development and implementation in practice of road construction of modified asphalt concrete mixtures that ensure the durability of road surfaces. The most well-known and widespread polymeric materials that can significantly improve the properties of pavements include rubber powders obtained from recycling tires and other rubber products made on the basis of non-polar rubbers.

It is known that the introduction of rubber powder into asphalt concrete mixtures improves the performance properties of asphalt concrete (V. A. Kuznetsov et al. Copyright certificate N 292917, 1971, B. Blind M. “Study of the effect of rubber powder on properties of asphalt concrete” ed. SoyuzDorNII, Balashikha, 1972, “Road Asphalt Concrete”, edited by Professor L. B. Gezenzveya, published by “Transport”, Moscow, 1985).

Rubber powders are obtained as a result of processing secondary material resources, mainly out-of-use tires and other rubber products made on the basis of non-polar rubbers. This process is of great environmental and economic importance. The theoretical foundations for the creation of methods for the destruction of waste elastomeric materials have been developed for a long time and are associated with the anomalous temperature-velocity dependence of the strength of these materials during destruction.

These powders have the following requirements:

- particle size not more than 1, 0 mm

- the value of the specific geometric surface is not less than 3500 cm / g

- the maximum temperature in the grinding zone should not exceed 150 ° C.

The resulting rubber powders that meet the above indicators, quickly dispersed in the bitumen introduced into the asphalt mixture, and do not lead to an increase in the time of manufacture of these mixtures. In addition, these rubber powders, they are called active, retain the basic physicochemical properties of tire rubbers, which ensures their ability to combine at the molecular level with petroleum bitumen.

The processes of grinding rubber rubbers began to spread widely in the middle of the last century (GN Zachesova, AN Zherebtsov, L. A. Zinovyeva “Production and use of fine powders of rubber and powder regenerate”. Thematic review, Moscow, 1987) Currently widely used the following methods for obtaining rubber powders:

- cryogenic method - mechanical destruction of scrap rubber at ultra low temperatures;

- mechanical grinding method at positive temperatures under the action of deformation of all-round compression and shear using rolls and extruders.

These methods allow to obtain rubber powders with a particle size of up to 1, 0 mm, but the particles have a smooth surface and a low specific geometric surface and are not active, which does not allow to obtain a fairly homogeneous composition of the composition when entering them into ABS at a temperature of 180-220 ° C . However, in Russia and other countries, these grinding methods are widespread. The cryogenic method is used by INTEC (Germany), WIRTECH (Switzerland), CAMECOTECH CJSC (Russia), etc. The mechanical method is used by MEWA Recycling Maschinen und Anlagenbau GmbH (Germany), Chekhov Regenerative Plant OJSC ( Russia) and many others.

At present, two models of dispersants are used to obtain active powders required to modify asphalt mixes.

On dispersants used in the production of LLC “Novy Kauchuk” (patent RU 2173634) the process of obtaining active powders is carried out according to the technology of high-temperature shear grinding, based on the use of the phenomenon of multiple cracking of rubber under conditions of intense compression, shear and heating to 170 ° C.

On the equipment of the company "ASTOR" (RU Н ° 2254992 (application RU L

20041 1 1337/12) 2004) as a result of the simultaneous impact of volume compression, shear deformations, the difference in angular velocities of the surfaces of the grinding tool and intense friction of the surface layers of the material, the grinding process of stressed rubber in air is a chain mechanochemical process of alternating interdependent physical and chemical stages . An important feature of grinding rubber in the apparatus of the company "ASTOR" is a relatively low process temperature (145-150 ° C). At these temperatures, the elastic component of the rubber deformation is preserved, which ensures an increased ability of the powders to combine with oil bitumens. This leads to an increase in strength, a decrease in the formation of cracks and ruts in asphalt concrete pavements.

Thus, the thermomechanical destruction of rubbers during grinding is most relevant in the preparation of rubber powders for the modification of asphalt concrete mixtures.

Known modifying composition (RU 2377262 C 1, 2009), including an active rubber powder with a high specific surface, obtained by thermomechanical grinding, with a particle size of not more than 0.8 mm, a filler, which is a metasilicate of needle-like structure, a gelation initiator and a structuring agent.

However, the equipment for producing such active rubber powders is complex and very expensive, which results in an expensive active rubber powder and an increase in the final cost of asphalt concrete mixtures.

In addition, at present, mainly for the grinding of scrap rubber, methods for the production of rubber powders are used, as a result of which rubber powders with a particle size of up to 1, 0 mm are obtained, but the particles have smooth surface and are not sufficiently active for use in obtaining modified asphalt mixtures.

Thus, there is a need for the possibility of using such rubber powders in modifying compositions for asphalt concrete mixtures, which would simplify the preparation of such compositions and their cost.

Accordingly, it is an object of the present invention to provide a modifying composition (additive) for various types of asphalt concrete mixtures (ABS), which is introduced directly during the manufacture of the mixture and improves the performance characteristics of asphalt concrete, which may include widely obtained rubber powders with a low specific surface, which are not used in modifying compositions for asphalt mixes, as well as modifying compositions that improve the performance characteristics of various types asphalt concrete.

For the use of rubber powders with a low specific geometric surface in modifying compositions for asphalt concrete mixtures, the authors developed a method for their chemical activation with the formation of an active powder. Plasticizers with predominant content of aromatic hydrocarbons, i.e., can be used as an activating additive. petroleum oils. Petroleum oils combine well with non-polar rubbers and can interact with the oil component of bitumen. Petroleum oils used to activate the rubber powder should have a flash point above the asphalt-concrete mixes production temperature. It should not be lower than 230 ° C, since the temperature of the production of asphalt mixes reaches 200-220 ° C. Therefore, as an activating additive, oil oils “PM” and “Netoxol” are chosen, in particular oil PN-6Sh, whose flash point is much higher than 230 ° C, as well as a very low pour point (below -3.0 ° C) and a slight weight loss. at 180 ° C (0.14-0.2%).

Activation of the surface of rubber powders with a low specific geometric surface is as follows. Into the mixer rubber powder is loaded and 5-10% of petroleum oil by weight of the powder is injected. Mixing lasts from 10 to 15 minutes, while there is no agglomeration of powder particles. The curing time (exposure) of the activated powder is 24 hours.

It was found that the swelling of rubber powder in petroleum oil leads to loosening of the surface and the formation of intramolecular channels. This contributes to the rapid interaction of the powder with bitumen when introducing it into the asphalt concrete mixture.

Activated rubber powders of tire and / or rubber products obtained by thermomechanical grinding or chemical treatment are the main components of the modifying composition (modifier). In this case, the composition must meet the following requirements.

1. The modifier should not be agglomerated during the manufacture, transportation and storage of asphalt concrete mixture.

2. The modifier should quickly disperse in the bitumen in the manufacture of asphalt mixes, regardless of its quantity.

3. The modifier should increase the elastic component of the deformation of asphalt concrete, which contributes to increasing its resistance to increased loads and a sharp decrease in groove formation.

4. The modifier should increase the structural adhesion, which will dramatically reduce the cracking of the coating.

5. The introduction of the modifier should increase the adhesion of bitumen to the mineral component of the asphalt concrete mix.

6. The modifier may have in its composition a substance that can increase the aging of bitumen, which will lead to an increase in the life of road surfaces.

7. The modifier should include substances that can increase heat and ozone resistance, resistance to aggressive media, water resistance, and reduce the gas permeability of road surfaces.

The technical result is achieved modifying composition for asphalt mixtures, including active rubber powder, obtained by grinding tires and rubber products based on non-polar rubbers with a particle size of not more than 1, 0 mm, preferably 0.5-1, 0, where the active rubber powder is a rubber powder with a developed specific surface, obtained by thermomechanical grinding, or rubber powder, chemically activated with petroleum oil, or their mixture, filler, adhesive and structuring agent. The resulting rubber powder with a particle size of not more than 1, 0 mm includes all fractions of rubber powders with a particle size of less than 1, 0 mm.

Rubber powder is obtained by grinding worn tires, as well as waste rubber products made from natural, cis-isoprene, ethylene-propylene, styrene-butadiene rubbers.

The specific geometric surface for active rubber powders obtained by thermomechanical grinding is at least 3500 cm / g.

The content of active rubber powders in the composition is from 60 to 75 wt.% By weight of the composition.

The content of the active rubber powder obtained by the thermomechanical grinding method in the mixture of active rubber powders when using the mixture in the modifying composition is from 0.1% to 99.9%, and accordingly the content of the active rubber powder in the mixture obtained by chemical activation is from 99 , 9% to 0.1%. This implies that these intervals include all possible narrower intervals that are included in these intervals.

The composition may additionally contain crushed rubber waste based on butyl rubbers with a particle size of up to 2.0 mm in an amount of from 10 to 15 wt.%, Which contribute to an increase in heat and ozone resistance, resistance to aggressive media, water resistance. This is especially necessary for road surfaces in climatic zones with high temperature and humidity.

To accelerate the distribution of the modifying composition in the asphalt mixture, the composition contains a filler, which is ground mica - phlogopite or muscovite, which also increases the resistance of asphalt concrete to aggressive media, and also contains diatomite as a filler to accelerate the interaction of the modifier with bitumen. Content four

7 ground mica in the composition is from 15 to 25 wt.% The ground mica used in the composition typically has a particle size of not more than 0.63 mm, preferably from 0.3 to 0.63 mm. The content of diatomite in the composition is from 5 to 10 wt.%. The diatomite used in the composition has a particle size of not more than 0.3 mm, preferably from 0, 1 to 0.3 mm.

To increase the strength of the bond between the rubber bitumen binder and the mineral part of the asphalt concrete mixture, adhesives and structuring agents are introduced into the composition.

As an adhesive, resins selected from phenol-formaldehyde resin, oligomeric epoxy ester resin, epoxy-diane resin are used. In particular, phenol-formaldehyde resins from the following row are used in the composition: resin 101 k, BrightO SO, Brightol 1 10, FL-326. The content of the adhesive in the composition is from 1, 0 to 2.5 wt.%.

As a structuring agent, selected from a disulfide alkyl phenol formaldehyde resin, a phenol formaldehyde resin, an oligomeric epoxy ester resin, an epoxy-diane resin are used. In particular, a disulfide alkyl phenol formaldehyde resin from the following series FR-12, SF-280, octofor 10S, resorcinol formaldehyde resin is used in the composition. The content of the structuring additive is from 1, 0 to 2.5 wt.%.

Additionally, the modifying composition may contain from 0.3 to 1, 0 wt.%) Foaming agent (blowing agent), which promotes rapid mixing of the modifier with bitumen. The blowing agent is generally selected from known agents such as azodicarbonamides and azoisobutyl nitriles. In particular, foaming agents with a decomposition temperature of 140-160 ° C are used.

Additionally, the modifying additive may contain from 0.3 to 1, 0 wt.%) Antioxidant to increase the resistance of mixtures to multiple strains. Antioxidant is chosen, as a rule, from naphthanes, acetonanil, anilinonaphthalenes. In particular, naphthanes are used, preferably naphtha-2 (neozone D) and paraoxine ozone.

To improve the properties of asphalt mixes and obtained on their Based on pavements, it is sufficient to introduce from 0.3 to 1, 0% by weight of the modifying composition based on the weight of the mineral component of the asphalt-concrete mixture, depending on the type of the mixture. At the same time, the known modifying compositions are introduced in the amount of more than 1, 0 wt.% From the mass of the mineral component of the asphalt-concrete mixture.

According to the present invention, it is possible to obtain modifying compositions for different climatic zones. Below are the compositions for the two climatic zones:

As previously reported, many enterprises in the processing of scrap rubber receive rubber crumb with a low specific surface. Therefore, to expand the production of the modifier, including at existing enterprises producing rubber powders, a chemical-containing rubber additive (HDD) or, in other words, a concentrate has been developed, which allows organizing the release of the modifier with a minimum investment. The chemical rubber additive contains all the necessary substances for the production of the modifying composition, such as an active rubber powder, a filler, an adhesive and a structuring agent, and optionally a foaming agent and an antioxidant. The content of the active rubber powder in the HDR is from 18 to 30 wt.%.

Then, to obtain a modifying composition, it is necessary to mix 35-45% XRD on a mixer with 55-65% active rubber powder, where rubber powder with a developed specific surface, obtained by thermomechanical grinding, and / or rubber powder chemically activated with oil is used as active rubber powder oil

As well as the modifying composition, HDD can be obtained for different climatic zones.

HRD contains the following components (%%)

The composition of the preparation The composition of the preparation of the modifier for the modifier for zones with temperate and climatic zones with cold elevated climate and humidity

Active rubber 23-30 18-24

powder

Rubber powder 5-10

based on butyl rubber

Filling: Ground 40-48 47-54

mica (phlogopite or

muscovite) and / or

Diatomite 15-20 10-15

Adhesive 3.0-4.8 3-5

Structuring additive 3.0-4.8 3-5

And, not necessarily,

Blowing agent 1, 1 -1, 4 1, 1 -1, 4

Antioxidant 1, 1-1, 4 1, 1 -1, 4 The modifying composition and chemical rubber additive can be obtained in one way, which will differ only in the amount of active rubber powder introduced.

This method includes pre-crushing of the resin to a particle size of not more than 25 mm, preferably from 10 to 25 mm, grinding the resin to a size of not more than 0.8 mm, preferably 0.3 to 0.8, optionally mixed with an antioxidant, after which the combination of the mixture with fillers, optionally foaming agent, and rubber powder, thoroughly mixing the mixture. Rubber powder is injected in the amount of 7-25 wt.% Or 60-70 wt.% Depending on whether you get HRD or modifying composition. Ready modifying compositions or HDR are packed in containers (bags or “big bags”) and sent to the warehouse.

The resulting compositions and HRD can be easily transported and they have a significant shelf life - more than a year.

The following are examples showing how to obtain a modifying composition and conducting complex tests of various types of asphalt concrete, obtained using a modifying composition, both on the basis of active rubber powders, and using HRD with the addition of active rubber powders. Modifying compositions were introduced into the asphalt mixture after entering the bitumen according to current technologies. The compositions were used in the production of asphalt concrete mixes of types A and B (GOST 9128-97) and SMMA (GOST 31015- 2002) with the use of various bitumens, crushed stone, sand and mineral powder.

EXAMPLES

Example 1

Preparation of Modifying Composition or HRD Modifying compositions or HRD are prepared by the following method. Using pin crushers, pieces of adhesive and structuring agent are pre-ground to a particle size of 15-25 mm, mixed and, if necessary, an antioxidant is injected, the mixture is fed to fine grinding in a roller mill, where it is ground to sizes of 0.3-0.8 mm. In the fine mixture is injected active rubber powder, filler and if necessary, a foaming agent, and thoroughly mixed on a blade mixer of continuous action. Rubber powder is administered in the amount of 5-25 wt.% Or 60-75 wt.% Depending on whether you get HRD or modifying composition.

The compositions of the obtained compositions are presented in table 1 and table 2

Table 1

The compositions of the modifying composition

Note:

* - active rubber powder, obtained by thermomechanical grinding method;

** - a mixture of rubber powder obtained by thermomechanical grinding method (27%) and rubber powder chemically activated (73%); *** - only chemically activated rubber powder.

table 2

HRD Formulations

The composition (wt.%)

HRD components 4 5 6

Active rubber powder 30 * 24 ** 26 ***

Powder rubber based on Butyl rubber 5 8 10 Filler:

Ground mica (phlogopite or muscovite) 54 52.5 times. hour. 0.63 mm

Diatomite, time. hour. 0.3 mm

Adhesive - SF - 280 5 ^< 5 5

Structuring additive - octofor 10S 5 5.5 5.5

Blowing agent - Azocarbonamide 0.5 0.5 1

Antioxidant - acetonanil 0.5 1 -

Note:

* - active rubber powder, obtained by thermomechanical grinding method;

** - a mixture of rubber powder obtained by thermomechanical grinding method (27%) and rubber powder chemically activated (73%); ** * - only chemically activated rubber powder.

Example 2

Preparation of the modifying composition from HRD The modifying composition is obtained by mixing the previously obtained XRD by adding an active rubber powder to the XRD. HRD prepared according to example 1 and corresponds to the composition of 5.

The compositions of the obtained compositions are presented in table 3

Table 3

Example 3

Manufactured in accordance with the generally accepted technology of asphalt concrete mixes. Type A mixtures of grade 1. Modifiers were introduced after the introduction of bitumen. The distribution of modifiers in the mixture did not exceed 20-30 seconds. Table 4 presents the results of tests of asphalt concrete type A without a modifier (serial) and with a modifier based on active and activated powders. The mixture used Bitumen 60/90 bitumen in the amount of 5.5%.

Table 4

As can be seen from the presented results, the modified asphalt type A asphalt concrete differs from the high-grade asphalt concrete with high water resistance and high deformability, which greatly increases their durability both at positive and at negative temperatures.

Example 4

Table 5 presents the expanded test results of the most common type of B-1 in Russia without a modifier, as well as with modifiers based on active and activated powders and powders obtained from rubber utilization based on butyl rubber. The mixture used Bitumen 60/90 bitumen in the amount of 5.0%.

Resistance to rutting, rut depth after 10 thousand passes, mm, at a pressure of 0.8 MPa, temperature 50 ° С

As can be seen from the presented results, modified asphalt concrete with the use of all types of modifiers are highly resistant to water, significantly increased strength and resistance to groove formation. It should also be noted that the modified asphalt concrete is more elastic, which improves their performance at positive and negative temperatures.

Example 5

Tests of modified crushed stone-mastic asphalt concrete (SMMA-15) were carried out. It should be noted that these asphalt concrete have a special structure, which provides them with a sufficiently high strength and durability. The mixture used Bitumen 60/90 bitumen in the amount of 5.7%.

The test results are presented in table 6.

Table 6

As can be seen from the presented results, the modified asphalt concrete type Schma-15 largely surpasses the serial, especially in terms of runoff, water saturation and compressive strength, which undoubtedly guarantees improved performance characteristics of coatings and the absence of bituminous spots.

The tests of example 5 show that the modifying additive can be used as a stabilizing additive.

As follows from the above examples and their results of the claimed invention, it is possible to use rubber powder with a low specific surface in modifying compositions for asphalt concrete mixtures, due to the chemical activation of rubber powder with petroleum oils, which reduces the cost of obtaining a modifying composition and at the same time significantly improve the performance of asphalt mixes. Also, the use of modifying compositions according to the present invention increases the elastic component of deformation of asphalt concrete, which increases its resistance to increased loads and drastically reduces rutting, increases structural adhesion, which can drastically reduce cracking of the coating, increases adhesion of bitumen to the mineral component of asphalt concrete mixture, increases heat and ozone resistance , resistance to aggressive environments, water resistance, and also reduces the gas permeability of the road is covered d.

Claims

CLAIM

1. Modifying composition for asphalt concrete mixtures based on rubber powder, including

- from 60 to 75% by weight of an active rubber powder of a product from the processing of tires and / or rubber products with a particle size of not more than 1 mm,

- filler, which is ground mica and / or diatomite,

- adhesive, and

- structuring additive.

where the active rubber powder is a rubber powder with a developed specific surface, obtained by thermomechanical grinding, or a rubber powder chemically activated with petroleum oil, or a mixture thereof.

2. The composition according to p., Characterized in that as an active

g

rubber powder it contains rubber powder obtained by chemical activation of petroleum oil.

3. The composition according to claim 1, characterized in that the structuring agent is selected from disulfide alkyl phenol formaldehyde resins, preferably from the FR-12, SF-280 series, octofor 10S, resorcinol formaldehyde resin.

4. The composition according to claim 1, characterized in that the adhesive is selected from phenol-formaldehyde resins, preferably from the following row: resin

101 k, Yarkopol'yuO, Yarkopol, 1 10, FL-326.

5. The composition according to claim 1, characterized in that the composition contains muscovite or phlogopite as ground mica.

6. The composition according to claim 5, characterized in that ground mica has a particle size of not more than 0.63 mm, and diatomite has a particle size of not more than 0.3 mm.

7. The composition according to claim 1, characterized in that it additionally contains a blowing agent.

8. The composition according to claim 7, characterized in that the foaming agent is chosen from azodicarbonamides, preferably azodicarbonamides with a decomposition temperature of 140-160 ° C.

9. The composition according to claim 1, characterized in that it additionally contains an antioxidant, preferably Naftan.

10. The composition according to claim 7, characterized in that it additionally contains an antioxidant, preferably selected from naphthan.

1 1. Composition according to any one of paragraphs 1 to 9, characterized in that the composition additionally contains crushed rubber waste based on butyl rubber.

12. Composition according to any one of paragraphs 1-10, characterized in that it is used in asphalt concrete mixtures in areas with a temperate and cold climate.

13. The composition according to claim 1, characterized in that it is used in asphalt mixtures in areas with high temperature and humidity.

14. The method of obtaining the modifying composition according to any one of paragraphs 1 to 13, including pre-crushing of the resins to a particle size of not more than 25 mm, grinding of the resins to a size of not more than 0.8 mm, optionally in a mixture with an antioxidant, after which the obtained mixtures with fillers, optionally a foaming agent and rubber powder, thoroughly mixing the mixture, with a rubber powder content of not more than 60-75%,

where as a rubber powder is used active rubber powder with a developed specific surface, obtained by thermomechanical grinding, and / or rubber powder chemically activated with petroleum oil.

15. The method according to p. 14, characterized in that the rubber powder is chemically activated with petroleum oil in an amount of from 5 to 10 wt.% By weight of the powder.

16. The method according to p. 14, characterized in that it additionally injected crushed rubber waste based on butyl rubber.

17. Himso holding rubber additive to obtain a modifying composition according to any one of p. 1 to 13, including

- from 18 up to 30% by weight) of the active rubber powder of the product of processing tires and / or rubber products with a particle size of not more than 1 mm

- filler, which is ground mica and / or diatomite,

- adhesive, and - structuring additive,

where as an active rubber powder use rubber powder with a developed specific surface, obtained by thermomechanical grinding, and / or rubber powder, chemically activated with petroleum oil.

18. Additive according to claim 17, characterized in that it contains rubber powder obtained by chemical activation with petroleum oil as an active rubber powder.

19. Additive according to claim 17, characterized in that the structuring agent is selected from disulfide alkyl phenol formaldehyde resins, preferably from the series FR-12, SF-280, octoform 1 OS, resorcin formaldehyde resin.

20. Additive according to claim 17, characterized in that the adhesive is chosen from phenol-formaldehyde resins, preferably from the following row: resin 101k, Brightol SO, Brightol 1 10, FL-326.

21. Additive according to claim 17, characterized in that the composition contains muscovite or phlogopite as ground mica.

22. Additive according to claim 21, characterized in that ground mica has a particle size of not more than 0.63 mm, and diatomite has a particle size of not more than 0.3 mm.

23. Additive under item 17, characterized in that it additionally contains a foaming agent.

24. Additive according to claim 23, characterized in that the foaming agent is selected from azodicarbonamides, preferably azodicarbonamides with a decomposition temperature of 140-160 ° C.

25. Additive under item 17, characterized in that it additionally contains an antioxidant, preferably selected from naphthan.

26. The additive according to item 23, characterized in that it additionally contains an antioxidant, preferably selected from naphthan.

27. Additive according to any one of paragraphs 17-26, characterized in that the composition further comprises crushed rubber waste based on butyl rubbers.

28. A method of producing a chemical-containing rubber additive according to any one of claims 17 to 27, comprising pre-crushing the resins to a particle size of not more than 25 mm, grinding the resins to a size of not more than 0.8 mm, not necessarily in a mixture with an antioxidant, after which the mixture is combined with fillers, rubber powder and, optionally, a foaming agent, and thoroughly mixed, with a content of rubber powders no more than 18-30%,

29. The method according to p. 24, characterized in that the rubber powder is chemically activated with petroleum oil in an amount up to 10 wt.% By weight of the powder.

30. The method according to p. 28, characterized in that it additionally imposes crushed rubber waste based on butyl rubbers.

31. A method for producing a modifying composition according to claim 1, comprising mixing a chemical-containing rubber additive with rubber powder in a ratio of 35:65 to 45:55.

32. The method according to p. 31, characterized in that the rubber powder is chemically activated with petroleum oil in an amount of from 5 to 10 wt.% By weight of the powder.

33. Chemically activated rubber powder to obtain a modifying composition according to any one of claims 1 to 13 or a chemical-containing rubber additive according to any one of claims 17-27, obtained by treating the rubber powder with petroleum oil in an amount of 5 to 10 wt.% by weight of the powder, where the rubber powder has a low specific geometric surface and a particle size of not more than 1 mm.

34. Chemically activated rubber powder according to clause 29, wherein the petroleum oil has a flash point of at least 230 ° C.

35. Chemically activated rubber powder according to clause 29, wherein the petroleum oil includes oil PN-BS.

36. Chemically activated rubber powder according to claim 29, characterized in that the treatment of the rubber powder is carried out in the mixer for a time period of not more than 1 minute, preferably 10-15 minutes, followed by aging for 24 hours.

37. Asphalt concrete mixture containing mineral materials and bitumen, characterized in that it contains the modifying composition according to any one of section 1 to 13, in an amount from 0.3 to 1, 0 wt.% Relative to the total mass of mineral material.

38. Asphalt mixture according to claim 33, wherein the modifying composition is used as a stabilizing additive.