RU1787994C - Binder for asphalt-concrete mix - Google Patents

Abstract

Usage: road construction. SUMMARY OF THE INVENTION: The cementitious for the asphalt mix contains: bitumen 94-96%; a mixture of VAT residues of cotton soap stock with VAT residues of synthetic fatty acids in a ratio of 2: 1-1: 4 4-6%. Strength is 2.82-3.69 MPa, water resistance coefficient 1.16-1.18, heat resistance coefficient 1.41-1.49. 3 tab.:. . -

Description

The invention relates to road construction, in particular to the production of adhesives for asphalt mixtures.

Known for paving adhesives, including in May. % gossypol resin 20-24, lime milk 25% concentration 1.2-1.5, heavy oil - the rest.

The closest technical result achieved is a binder comprising bitumen and distillation residues of synthetic fatty acids in an amount of May 3-5. %

The disadvantage of these binders is its insufficient adhesion, as well as the low water resistance of asphalt concrete based on it.

The aim of the invention is to increase the adhesion of the binder, as well as the water resistance of asphalt based on it.

This is achieved by the fact that the cement for the asphalt mixture, including bitumen and bottoms of synthetic fatty acids, additionally contains

distillation residues of cotton sapsto acids: ka, with a ratio of the latter mixed with distillation residues of fatty acids 2: 1-1: 4 in the following ratio of components, May. %:

Bitumen. . 94-: 96

A mixture of these bottoms

residues 4-6

The used bottoms of cotton soap and synthetic fatty acids have the characteristics given in the table. 1.

A mixture of these bottoms has the following characteristics, are given in table.2. ..

The additive contains compounds with different functional groups (carboxyl, ether, hydroxy, unsaturated), which are reactive to the mineral component m in the temperature range of the preparation of the asphalt mix, which ultimately leads to an improvement in the quality of the asphalt mix and asphalt concrete.

Joint venture

WITH

vj

00 vj Yu Oh

On the described; in asphalt mixes are prepared, for which purpose the following materials are used.

Crushed stone of 5-20 mm from granites of brand 800 in accordance with GOST 8667-82, sand crushed from granites of brand 680 in accordance with GOST 8736-77, mineral powder well-known in accordance with GOST

.16557-78.:,.,. ,,.;., ...;

P m 1 p In 291 g (97%) of BND 90 / 13U grade bitumen heated to 120 ° C, 9 g (3%) of a mixture of distillation residues of FFA and distillation residues of cotton soap stock are introduced with stirring at a ratio of 5: 1; 1 hour. A concrete mix is prepared on the base.

The properties of the resulting asphalt, as well as other examples are given in table. 3 .:

0

5

0

As can be seen from the above data, cement has increased adhesion, due to which asphalt concrete has high water resistance.

Formula of the invention An astringent for an asphalt concrete mixture, including bitumen and distillation residues of synthetic fatty acids, characterized in that, in order to increase adhesion to the aggregate, as well as the water resistance of the asphalt concrete based on it, it additionally contains distillation residues of acidic cobalt stock. the ratio of the latter in a mixture with still bottoms of synthetic fatty acids 2: 1-1: 4 in the following ratio of components, May. %:

Bitumen,. . 94-96, a Mixture of these bottoms 4-6

Table 1

table 2

Physical and mechanical properties of asphalt concrete

Parts of the VAT residue of cotton soap stock

/cm

ychi

th

2.34 2.352.35

1.68 1,, 51

0.00 0.0030.003

26,735,5

19,625,2

0.801.16

1.36i, 4l

3H 25.8

1.17

1.43

T a blitz 3

t

2.3 1.65

0.04

27.8

20.1

0.83

1.38

2,352.35

1,561.5

0,0030,003

28.6

25,2

1.17

1.49

28,2

26.2

1.1

i; w

2.35

1.70

0.004

30,0

23.0

0.88

1.30

2,34

1.72

0.005

32.4

24.8

0.9 1.39