SU466198A1 - The method of preparation of concrete mix - Google Patents

Description

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This invention relates to methods for preparing concrete mixtures for the production of concrete products.

There is a known method for preparing a concrete mix, which consists of mixing aggregates and additives, for example epoxy resin, and the subsequent introduction of cement and water.

The aim of the invention is to increase the physicomechanical properties and reduce the bulk density of concrete products.

This is achieved by the fact that the pre-dried coarse porous aggregate is mixed with epoxy resin and introduced into the mixture of the other components by the time the resin begins to polymerize.

The essence of the proposed method is that air-dry coarse porous filler is mixed with epoxy resin or other liquid polymer in an amount of I -1.4% of the bulk weight of concrete. The weight of the curing agent is 10-12% by weight of the polymer. As a result of mixing, the aggregate is covered with a waterproof sheath. The resulting mass at the start of polymerisation, i.e., when polymeric filaments appear, is introduced into the mixture of cement, sand, water and mixed.

The prepared concrete mixture is placed in the form and molded product. For the initial normal hardening of concrete, an air-dry medium is preferable.

Polymer shell concrete has significant (advantages not only over ordinary concretes on porous aggregates, but also on cement-polymeric concretes. Therefore, its range of application can be wider, and its technical and economic efficiency is higher than that of the latter.

Polymer shell concrete has high physicomechanical properties, is a valuable structural material and can be used along with heavy concrete in critical structures and structures.

constructions, including prestressed ones. In addition, its low volumetric weight and increased ultimate stretchability are important, which increases the degree of steel utilization in reinforced concrete structures.

Subject invention

A method of preparing a concrete mix, which consists in mixing aggregates and additives, for example epoxy resin, and the subsequent introduction of cement and water, characterized in that, in order to improve the physical and mechanical properties and reduce 3 volume weight of concrete products, take a large porous aggregate, dried 4 to a moisture content of 1%, and cement and water are injected at the time the resin begins to polymerize.