SU960139A1 - Tar concrete mix - Google Patents

Description

(5) DEGTA CONCRETE MIXTURE

,, , one - ; : ...,.:,. ,,. ;;; / .. The invention relates to road building materials and can be used to cover roads. A tar-concrete mixture is known, including coal tar, crushed sand and mineral powder tl. . The closest in technical essence and the achieved result is tar-concrete mixture 12, which includes the mineral part — sand and rubble and sticking — coal tar (a product of coal tar resin Q Q-Cjpc with a viscosity of 5-120 s), phthalic anhydride or a distillation residue phthalic anhydride and polyvinyl chloride, with the following ratio of components, wt .: Mineral part, 1.00 V, (over 100% Coal tar. 68.5-88, Phthalic anhydride: or residue of phthalic anhydride distillation 10-30 Polyvinyl chloride 0.5-1.5 Inadequate These mixtures are low strength and water resistance of the resulting tar concrete. The aim of the invention is to increase the strength and water resistance of tar concrete. This is achieved by the fact that the asphalt concrete mixture, including sand, crushed stone, coal tar and the residue of phthalic anhydride distillation, contains these components The following ratio, by weight; Sand33, B-62, k Coal tar5.7-7.0 Phthalic anhydride distillation residue 7.5-12 Crushed stoneOthers 396 Phthalic anhydride distillation residue (QflA) is It is a dry fine powder, which is formed in the cleaning process phthalic anhydrite yes quinone impurities. It is characterized by the content of the basic substance phthalic anhydride) 50-70%, non-volatile sediment, including ash 6-8. The presence of atomic groupings and C-0 in the composition of the distillation residue of phthalic anhydride ensures the formation of strong, water-resistant chemisorption bonds with tar, as a result of which activation is not necessary. The physicomechanical properties of the distillation residue of phthalic anhydride, according to the parameters normalized by the technical requirements for the mineral powder, are as follows. Grain composition,%. Smaller than 1.25 mm 100 Copper 0.315 mm 59-99.5. Smaller than 0.07 V mm 70-80 Porosity D across. volume 2b. Swelling of samples from a mixture of the residue with tar, by volume of the tar, approximately (t) (100 cm of absolute volume) 57

Tar-concrete mixture is prepared as follows.

In the asphalt concrete mixer, pre-dose altered mass is supplied, kg / m

Water saturation,% volume

Swelling,% by volume

Compressive strength, MPa

at 20 ° C at

35After testing of the compositions indicated

the results are presented in table. 2

Table 2

2400-24202360

0.15-3,600,5

0, 230.09

i, 35-7,0515,1

1, -2.355 ,. ben, sand and the residue of phthalic anhydride distillation. Crushed stone and sand are preheated to 120-130С. Non-oral materials are mixed for 1 min. The particles of phthalic anhydride distillation residue are deposited on the rubble and sand particles, creating numerous centers on the surface of mineral grains and increasing their energy potential and activity when interacting with tar. Then the tar heated to 100-1 is fed into the mixer and all components are mixed until a smooth concrete mixture is obtained for 1-3 minutes. Ready t. Three mixtures with the content of the components presented in table. M. Table 1 39.8 А6.5 (2.k Distillation residue of phthalic anhyd 7, 5 9, 12 read

Coefficient of water resistance

Claims (2)

Coef (-) ICC at. long-term watering Degtebeton the proposed composition has a high strength. compression and water resistance. The invention is a tar-concrete mixture comprising sand, crushed stone, coal tar and the residue of the distillation of phthalic anhydride, and it also contains these components for the purpose of improving the strength and water resistance of tar-concrete. the following ratio, mas: Continued table. 2 0.83-0.92 1.0 1.0. 1.0 p, 80 0,82 0,86 Sand 39,8-62, Coal tar-5,7-7, О Phthalic anhydride distillation residue Crushed stone Others Sources of information taken into account during the examination 1. Pour-concrete and hot concrete-road mixtures. TU 218 USSR 192-78. Kiev, Mindorstroy USSR, 1979. 2. USSR author's certificate according to the application N2812708 / 29-33, cl. S O B 13/30, 1979.