Asphalt concrete mix

 

The invention relates to the construction and can be used in the construction of the road asphalt-concrete pavements and bases. Effect: reduce the average and the true density of the asphalt mixture, simplifying the preparation of the mixture, reducing consumption of bitumen and expansion of the resource base. Asphalt mixture includes asphalt binder, aggregate, mineral powder and ebonite powder in a ratio of components in the mixture, wt.%: bitumen 4,0-8,0; placeholder 0-94; mineral powder 0-8; ebony babe 2-96, and the ratio of the mass of bitumen and aggregate surface ebony crumb less than or equal to 40 g/m2. table 1.

The invention relates to the construction and can be used in the construction of the road asphalt-concrete pavements and bases.

Known asphalt mixture comprising liquid bitumen, mineral powder and mineral filler (Manual on the construction of asphalt concrete pavements and bases for roads and airfields (SNiP 3.06.03-85, SNiP 3.06.06-88). - M.: Soundarya. - 1991. - S. 8, 12-17; Gezentsvey L. B. asphalt concrete. - M., 1960. - S. 138-139).

The disadvantage of such mixtures is the duration of the process of formation at the coating mixture, including polymer-bitumen or complex organic binder, aggregate and mineral powder (hochman L. M., Kapanadze N. And. Stock to the viscous asphalt binders. - Roads, 1986. No. 5. - S. 19-21).

Closest to the technical essence and the achieved result is an asphalt concrete mixture on the application number 2000118960/03 (019846) 04 26/26, 20.05.2002, 6 S., including asphalt binder, gravel, sand, mineral powder and ebony crumbs in the following ratio, wt.%: asphalt binder is a 4.5-6.5; gravel 50-54; sand 30-34; mineral powder 5,5-7,5; ebonite powder - rest.

The problem to which the invention is directed, is to reduce the average and the true density of asphalt mixture; the facilitation of the preparation of the mixture; reducing consumption of bitumen; the expansion of raw materials.

The essence of the claimed invention is that the coating mixture comprises a bitumen, aggregate, mineral powder and ebony crumbs in the following ratio of components, wt.%: bitumen 4.0-8.0; placeholder 0-94; mineral powder 0-8; ebony babe 2-96. The ratio of the quantity of bitumen to the total surface ebony crumbs should be no more than 40 g/m2.

scoi true density ebony crumbs, compared with the density of the mineral components of the mixture. It also allows us to give the asphalt coating thermal insulation function, thereby reducing the depth of freezing road construction, and consequently increasing the operational stability of asphalt concrete pavement.

In addition, the introduction of ebony crumbs leads to increased homogeneity of the structure of the asphalt due to the more intimate nature ebony aggregates and bitumen.

In this case, when the load from mechanical and thermal damage in asphalt concrete is the reduction of internal stresses in the contact zones of the structure, which is typical for heterogeneous (by nature) the components of the mixture, resulting in a positive effect on the durability of asphalt concrete pavement.

Introduction to asphalt mixture ebony crumbs with a ratio of less than or equal to 40 g/m2modifies the bitumen so that you can get nesliving mixture, regardless of its temperature and thereby to simplify the technology of preparation of the mixture due to the exclusion of the operation of its cooling by mixing.

The increase in the uniformity of the mixture and bitumen modification allows one to decrease the possibility of using crumb as a mineral powder and filler.

Using ebony crumbs allows to obtain economic benefit by reducing the cost of manufacture of the mixture, flow of bitumen and waste ebonite products.

The possibility of practical implementation of the invention is confirmed by the following description of technology of preparation of the proposed asphalt mixture.

Ebony crumbs made from waste plastic products by grinding in a hammer mill to obtain a particle size of less than 5 mm, the resulting scatter crumbs on a standard set of sieves and the obtained fractions crumbs are compositions with different amounts of the total surface.

Asphalt concrete mix type DF prepared as follows. Bitumen, mineral powder and mineral filler is heated to a temperature of 150-160C, ebonite powder is heated to a temperature of 110-120C, then the components are batched and mixed in the following sequence: first, the bitumen is mixed with ebony crumbs, then injected mineral powder and mineral filler and continue mixing until a homogeneous mixture. The resulting mixture was stored in the tank with the purpose of cooling to 20C.

From the mixture obtained, deposits samples are shown in the table.

The results show that:

1. The proposed composition of the asphalt mixture was allowed to get a stock mixture without forced cooling with stirring them to cool;

2. Getting ebony crumbs from waste plastic products, such as ebony boxes of batteries, allows, firstly, to solve the problem of recycling of waste plastic products, and secondly, to expand the raw material base for the preparation of a stock of asphalt mixes.

Claims

Mix asphalt, including asphalt binder, aggregate, mineral powder and ebonite powder, characterized in that the ratio of components in the mixture is, wt.%: bitumen 4,0-8,0; placeholder 0-94; mineral powder 0-8; ebony babe 2-96, and the ratio of the mass of bitumen and aggregate surface ebony crumb less than or equal to 40 g/m2.

 

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