Method for forming anti-ice layer on automobile road

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

 

The invention relates to automobile and road industry, for deicing device layer on the road surface.

Known method of preparing the composition for the device of the top layer of the road surface with anti-icing effect, including the manufacture of asphalt concrete pavement on asphalt plant by mixing the components with the addition of alkylalkoxysilane alkali metal and chloride salts. Asphalt coating produced in this way prevents re-icing during the transition temperature of 0°by melting ice and reduces the corrosive action on metals (patent No. 2053971, IPC 04 26/26) prototype.

The disadvantage of this method is the complexity of the process and high cost, as anti-icing additive is manufactured by specialized companies and then transported to an asphalt plant, where it is mixed with the entire volume of asphalt mixture and are then transported to the area of road construction. In addition, the composition works in a narrow range of temperatures, thus, there is a corrosive effect on metals and harmful effects of salts on the environment.

The technical problem of the invention is to simplify the technological process in the manufacture of protivopolojna the aqueous layer on the road surface, not having corrosive to metals and operating at an ambient temperature of up to - 20°C.

This object is achieved in that in the known method, including the application of substances on asphalt concrete mixture, as substances used crasneanscki modifier in the form of emulsion or suspension, the consumption of which 1 m2square pre-laid on the roadway asphalt mixture with a temperature of 80-100°is not less than 0.3-0.5 kg and which is characterized by the structural formula

where n=3-30 - the number of links

R is an organic radical, in particular alkyl, phenyl, alkene)

after applying the modifier is compaction of the asphalt mixture.

The use of various modifiers in asphalt mixtures to obtain angelolatry coating technique is widely known. A method of obtaining anti-icing agent on the basis of a mixture of metal chlorides with subsequent grinding and pre-mixture of the chlorides before chopping proplast at a temperature of 680-800°until a homogeneous composition and cool, and as a mixture of chlorides of metals used waste magnesium production (patent No. 2172331, IPC C 09 K 3/18).

Known method of preparing the composition of sustaita the top layer of pavement. The method is carried out by mixing the mineral components of the black organic binder and anti-icing additives. As anti-icing additives used powdered water-soluble mixture of alkyl-alkenylamine alkali metal and alkali metal chlorides (patent No. 2053971, IPC 04 26/26).

However, such compositions of asphalt mixes produced by direct mixing of the components at the asphalt plant and then the entire volume of the mixture used in the construction of the road. Mixtures have a corrosive effect on metals and harmful effects of salts on roadside strip.

The claimed technical solution modifier is applied to laid on the roadway asphaltic concrete floor with a temperature of 80-100°and consumption 0.3-0.5 kg/m2before you are rolling the roller with chemical grafting, accompanied by the formation of chemical cross-linking in the polymer structure, which strengthens the floor. Modifier fills all the pores and microcracks. After rolling the roller with the coverage you receive a new property, namely, a more durable layer depth of 1-1 .5 cm, which displaces the emergence of centers of crystallization of ice from the coating on the surface of the asphalt-concrete pavement. For the separation of the formed ice on the surface of the coating is sufficient is part of the effort, which arise between the tyre and the floor during movement of the vehicle.

Patent information research did not reveal a collection of characteristics, which provides the achieved results, so the proposed solution meets the criterion of "inventive step".

To speed up chemical reactions in the modifier, prior to its introduction into the asphalt mixture, optionally enter a catalyst (organic and inorganic acids), initiating the polymerization reaction.

Anti-corrosion effect is provided by the lack of salt in the composition of the modifier.

Table 1 shows the composition of the used asphalt mixture (in the string prototype specified deicing component included in the composition of the mixture); Table 2 shows the anti-icing properties of the resulting asphalt concrete layer in comparison with the prototype; Table 3 shows the results of experiments on the adhesion adhesion of ice to the received de-icing asphalt layer in comparison with the prototype, at a flow rate of reagent 0.5 kg/m2and the temperature of -7°-10°C.

From table 2 it follows that the physico-mechanical properties of the obtained anti-icing layer better than the raw modifier of asphalt concrete pavement and prototype. The inventive method of education deicing what about the layer of pavement reduces the adhesion of ice asphalt 7-8 times and the prototype 3-4 times.

Example 1.

As the organic radical R use alkyl (-CH3), the number n is taken equal to 30.

In the processing cell, which is a metal ring with a diameter of 140 mm and height 70 mm (see)made of asphalt mixture Type B, II brand (according to GOST 9128-97) is heated to 100°C. from Above put the modifier in the form of a solution with a concentration of the basic substance 30%. The amount of modifier (base material) is 0.5 kg/m2. Then formed the sample of asphalt concrete pavement under load 400 kg/cm2.

The drawing shows a device for determining the adhesion of ice to a sample of asphalt concrete pavement: 1 - case setup, 2 - ring with asphalt, ring of ice, 4 - cell, 5 - worm-gear, 6 - clamp, 7 - ice 8 - sample of asphalt concrete pavement, 9 - technical vaseline.

After cooling, the top sample was set ring with a diameter of 120 mm and a height of 30 mm, greased bottom technical vaseline to seal it, in which was placed the water. The water was frozen at a temperature of at the facility to determine the adhesion of ice asphalt (see), was measured shear force required for the separation of the ice from the sample surface asphalt.

Compared to the blank solution (without modifier) shear in the e decreased respectively with 0.95 kg/cm 2to 0, 11 kg/ cm2.

Example 2.

As the organic radical R use alkene (-CH=CH2)

The number n is taken equal to 14.

In the processing cell (analogously to example 1) is made to a sample of asphalt mixture, heated to 90°C. is applied on Top of the modifier in an amount of 0.4 kg/m2.

Conditions of freezing and getting ice, as in example 1.

The freezing temperature -10°C.

Shear load required for the separation of the ice from a sample of asphalt concrete pavement, compared to the blank solution decreased from 0.95 kg/cm2to 0.15 kg/cm2.

Example 3.

As the organic radical R using phenyl (Ph).

The number n is taken equal to 3.

In the processing cell (analogously to example 1) is made to a sample of asphalt mixture heated to 80°C. is applied on Top of the modifier in the amount of 0.3 kg/m

Conditions of freezing and getting ice, as in example 1.

The freezing temperature -10°C.

Shear load required for the separation of the ice from a sample of asphalt concrete pavement, compared to the blank solution decreased from 0.95 kg/cm2to 0.18 kg/cm2.

When testing with reduction of reagent consumption (<0.3 kg/m2) and lower temperature (<80° (C )increases the adhesion of ice to asphalt concrete, which significantly reduces eff is aktivnosti anti-icing properties.

When testing with the increase of the flow rate of the reagent (>0.5 kg/m2) grip ice with asphalt varies slightly.

The method is as follows.

On the prepared road clothes first laid asphalt concrete mixture, then mix asphalt is applied crasneanscki modifier in the form of emulsion or suspension, the consumption of which 1 m2square of asphalt mixture with a temperature of 80-100°is not less than 0.3-0.5 kg, this is followed by compaction of asphalt mixtures rink.

Table 1
CompositionGravel, wt.%Sand, wt.%Mineral powder, wt.%Deicing component, wt.%Bitumen, wt.%
Asphalt concrete type, mark II385210-6
The placeholder4048757

Legend to Table 1.

In accordance with SNiP 3.06.03-85 bitumen is not part of the main composition of the asphalt mix, so in Table 1, the total content of all components greater than 100%.

Table 2
IndexGOST 9128-97Structures
Asphalt without modifierAsphalt with modifier 0.5 kg/m2Asphalt with modifier 0.3 kg/m2the placeholder
Strength at 20°2,0-2,2the 3.84.964,882,5
The coefficient of water resistance0.75-0.850.870.960.960.91
Water saturation1.5-4.03.51.361.441.6

The method of forming the anti-icing layer on the road, including the application of substances on asphalt concrete mixture, characterized in that as the material used crasneanscki modifier in the form of emulsion or suspension, the consumption of which 1 m2square pre-laid on the roadway asphalt mixture with a temperature of 80-100°is not less than 0.3-0.5 kg, which is characterized by the structural formula

where n=3-30 - the number of links

R is an organic radical (in custodially, phenyl, alkene),

after applying the modifier is compaction of the asphalt mixture.



 

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