SU1694520A1 - Polymer concrete mix - Google Patents

Abstract

The invention relates to the field of building materials and can be used to manufacture arm-polymer structures operating under conditions of chemical aggression. The purpose of the invention is to increase the compressive strength and reduce shrinkage of the polymer concrete. Polymer concrete mix includes, wt%: furfurol-acetone monomer - 6 ... 8, benzenesulfonic acid - 1.5 ... 2.0, crushed stone of rocks with a content of 50-68% SiO2 fr. 5 ... 10 mm - 25 ... 28, fr. 1.25 ... 2.5 mm - 25 ... 28, sand of rocks with a content of 50-68% SiOa fr. 0.315 ... 0.63 mm - 25 ... 28.30% solution of attactic polypropylene in toluene - 0.4-0.6, and andesitic flour - the rest. The compressive strength of the polymer concrete is 95-99 MPa, a linear shrinkage of 0.02-0.04%. 2 tab.

Description

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with

The invention relates to the production of building materials, in particular to compositions of polymer concrete mixtures, which are used to make building or technological structures operating under conditions of chemical aggression,

The aim of the invention is to increase the compressive strength and reduce the shrinkage of the polymer concrete.

Polymer concrete mixture is prepared as follows. Furfurol acetone monomer is loaded into the concrete mixer, then a 30% solution of attactic polypropylene in toluene and andesitic flour are introduced with stirring.

The resulting mixture is combined with a benzene sulfonic acid melt and a mixture of rubble and sand of the specified particle size is added. Polymer concrete mix is stirred for 3-4 minutes and produced

molding, heat treatment and dismantling of finished products.

Heat treatment (dry heating) is carried out according to the mode: initial curing at a temperature of 20-25 ° С for 3.0-3.5 h, temperature rise up to 80 ° С for 1.5 h, isothermal heating at 80 ° С for 6-8 hours

Attactic polypropylene (TU 6-05- 1902-81) is an amorphous rubbery product of gray color. Introducing it into the composition of the polymer concrete mixture in the form of a 30% aqueous solution in toluene helps to reduce the shrinkage of the polymer concrete mixture during the solidification process.

The specified granulometric composition of the aggregates helps to obtain a dense polymer concrete structure with a spacing of 30-40 microns between the aggregate grains, which increases the strength of the contact

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layer of aggregate-polymer binder.

In tab. 1 shows the proposed and known compositions of the mixtures.

The properties of the proposed and known compositions are given in table. 2

Claims (1)

Invention Formula Polymer concrete mixture including furfurol-acetone monomer, benzo-sulphonic acid, crushed stone and sand of rocks, olefinic compound and andesitic flour, which in order to increase compressive strength and reduce shrinkage of polymer concrete, it contains crushed stone of rocks with a content of 50-V8 % SIU2 fractions 5–10 mm and fractions 1.25–2.5 mm, and sand of rocks with a content of 50–68% SI02 fractions of 0.135–0.63 mm, and as an olefinic compound, 30% The composition of the polymer mixture 0 five 0 a solution of tactical polypropylene in toluene in the following ratio, wt.%: Furfurolacetone monomer6-8 Benzene sulfonic acid 1.5-2.0 Crushed rock from the content 50-68% SI02 fractions 5-10 mm25-28 fractions 1.25-2.5, 25-28 Sand from rocks with content of 50-68% sjug fractions 0.135-0.63 mm25-28 30% solution attactic polypropylene in toluene 0,4-0,6 Andezitova flourErest Table 1