SU1300024A1 - Binder for road construction - Google Patents

Abstract

The invention relates to the field of road construction materials and can be used for road paving. The purpose of the invention is to increase the duration of storage at a temperature at a working temperature and increase the tolerance of concrete based on it. A bitumen contains 45.5–50% by weight of bitumen, 3.5–4.5 wt.% Styrene-indene resin, or distillation residues of crude benzene and the rest is tar with a conditional viscosity of C50 of 70–80 s and a content of insoluble substances n toluene 22.35%. The holding can be stored at a temperature of 120 ° C for 7 hours. The compressive strength at 0 ° C of fine-grained type B concrete is based on a 4.8-6.9 MPa which is described as a holding material. 3 tab. b (L tN5 4

Description

The invention relates to road building materials and can be used for road paving.

The purpose of the invention is to increase the length of storage of a concrete based on a concrete at a working temperature and increase the crack resistance of concrete.

The invention is carried out in the following manner.

In the bitumen heated to 120-130 ° C, bottom residues of crude benzene distillation or styrene-indene resin are added, stirred for 10 minutes.

bladed mixers, after which the temperature is reduced to 80-90 ° C. Coal tar, having a temperature of 60-70 ° C, is continuously mixed in the mixture. Duration of mixing is 15-20 minutes. Then, the temperature in the raiser is raised to the working 110-120 C.

Dp of preparation for a binder is used: bitumen BN 60/90, characterized by the needle penetration depth

25 ° С

- 83 degrees

temperapenetration, softening point 48 С, content of water-soluble compounds 0%; de50 50

70 45.5

50 30

Distillation residues of crude benzene

,five

Styrene Indeio resin

guest coal grade .D-6, characterized by conditional viscosity index cjg 70-80 s, content of toluene insoluble substances 22.35%, phenol content 1.1%, naphthalene content 1.6%, softening temperature of the residue after selection of fractions up to - 69 ° C; vat residues of crude benzene rectification, which are stable dark brown resins, well compatible with bitumen, increasing their polar properties. They are characterized by the following indicators: conditional viscosity index c1, d 20 s, substances insoluble in toluene are absent, water content is 0.7%, and oH is 6.7.

The styrene-indene resin is a pecciform substance with a softening temperature of 100 ° C, a moisture content of 0.4%, an acidity of 0.05%, and a sulfur content of 6%.

Examples of compositions in the user, its properties, as well as the properties of fine-grained concrete of the type based on it are presented in Tables 1, 2 and 3.

Table I

50 45,5 50 50 50 46,5 50 46,5 46 46

3.5

4.5 3.5

The proposed pending can be stored on its basis has increased resistance to friction at working temperature, which is characterized by more expensive than known, and concrete with lower strength at OS.

table 2

Table 3

5 13000246

Claims (1)

Claims for distillation cbipot o distillation residues benzene in the following ratio In a trestle for road construction components, wt.%: properties, including bitumen and tar, o t-Bitumen 45.5 - SO characterized by the fact that, with tse-styrene-indeel, an increase in the duration of the storage resin idle at operating temperature J round and increase crack resistance concrete based on it, it contains residues tar with conditional viscosity CJQ 70-fO-80 and with a substance content, non-growing raw 22.35% of toluene and dopol-benzene 3,5-4,5 styrene-indene resin or Tar Rest