SU1491873A1 - Binder for road construction - Google Patents

Abstract

The invention relates to road building materials and can be used to prepare mixtures used in the lower layers of road pavements. The purpose of the invention is to increase the adhesion of the substance to the mineral filler, to extend the plasticity range and reduce the rigidity of tar-based concrete. The road construction site contains 70 - 85 coal tar and 15 - 30 wt% bottoms produced by 2 - naphthol. Plasticity interval 59 - 61 ° C, adhesion to granite 4 - 5, to marble 5 points. The tensile strength of tartebeton at 20 ° C is 47.5-58 MPa. 4 tab.

Description

The invention relates to road building materials and can be used to prepare mixtures used in the lower layers of pavements.

The aim of the invention is to increase the adhesion of the agent to the mineral filler, to extend the plasticity range and reduce the rigidity of tarbeton based on it.

The invention is as follows.

The coal tar is heated to 110-120 ° C in order to remove moisture and volatile organic impurities. After that, a melt of bottoms from the production of 2-naphthol, which is removed after the final

stages of the technological cycle from the distiller's cube, with a temperature of 300 ° C. The resulting mixture is stirred for another 30-40 minutes at 150-80 ° C until a homogeneous mass with a given viscosity is obtained.

Distillation residues having a density of 1.389 kg / m and a softening temperature of 150-157 s are formed at the final stage of 2-naphthol production, the distillation stage of dehydrated 2-naphthol. After distillation of three fractions: I fraction with so kip. 200-210 ° C

II fraction with so kip. 210-230 with and

III fraction boiling at 230-300 ° C

residual black products containing 80.35% SMOLIST1.1X of hydrocarbons remain in the distiller's cube

four

WITH

sc

00

and 19.65% inorganic impurities.

The bottoms are withdrawn from the cube.

til torus with a temperature of 300 C.

The composition of the bottoms of the production of 2-naphthol following, wt.%

T des aromatic resin Dispersed coal 2-Naphthol Dinafthol Naphthalene Dinaftilen 1-Naphthol

Aromatic disulfonic acids (naphthalene derivatives) Polycyclic hydrocarbons identified Mechanical impurities

Toluene Insoluble Substances

GOLD, 7,

Disposal of the bottoms of 2-naphthol directly at the exit of the technological cycle allows reducing energy consumption due to heat recovery and eliminating additional equipment for partial cooling of waste. In addition, a temperature of 300 ° C makes it possible to maintain the bottoms in the molten state for the convenience of mixing the components and homogenizing the mixture.

The compositions in the gist and its properties are given in table. 1 and 2.

Table 1

Coal tar 75 80 70 Vat residues produced by 2- naphthol 15 20 30

Viscosity s

g °

50

Density,

kg / m

Content,

wt.%: water

water soluble compounds

toluene insoluble substances

Temperature

° С:

softening size 25-37 fragility (-15) - (-24)

table 2

12.5 3367

1 217 1 2261 254

No no no

0,270,32

16.1 16.5

17,8

34 -26

38 -21

On the current offer, tar-concrete mixtures of composition are prepared,% by mass. Granite seeding of a fraction of 10 mm 90 Lime mineral powder 10

As can be seen from the data given in Table 1, 3, the proposed sting has a high adhesion to the mineral

In excess

100% mineral

fillers8

The properties of degtebeton on the proposed in the holding and on the known are given in Table 3,

to the filler and has a wide range of plasticity, and tarbeton is less rigid.

Claims (1)

The formula is from A stinger for road construction, including coal tar and an additive, characterized in that, in order to increase adhesion in stranger to a mineral filler, extend the plasticity interval and reduce the rigidity of tarteto on its basis, it contains, as an additive, bottom residues of production of 2-naphthol in the following ratio of components, wt.%: Hard coal resin70-85 Bottoms production of 2 naphtha15-30