SU554236A1 - Concrete mix - Google Patents

Description

one

This invention relates to the building materials industry, namely to concrete mixes containing additives.

A known concrete mixture comprising a mineral, aggregate, water, and a plasticizing agent. As a plasticizing additive, the mixture contains, for example, a hydrazine salt in an amount of 0.05-1% by weight of the mineral binder 1.

A concrete mixture is also known, which includes a mineral fertilizer, aggregates, water, and an additive, for example, a sulphite yeast brew (SDB) 2.

Closest to the invention in terms of technical solution and the effect achieved is the first composition.

The known concrete mixtures cause a decrease in the strength of concrete at an early age, especially when used to accelerate the hardening of concrete by forced heat treatment. In addition, during heat treatment, known concrete mixtures lead to a decrease in the strength of concrete in late age.

The purpose of this invention is to increase the strength of concrete after heat treatment, increasing its density.

This is achieved by the fact that the concrete mixture comprising the mineral sticking compound.

the aggregate, water and the additive contain as an additive a condensation product of dichlorohydrtic polyethylene glycol with diethylenetriamine and dichlorohydrin polyethylene glycol with the following content of mixture components, in weight. %;

Minerallope 5-30

Filler60-80

Additive0.05-0.3

WaterEverything

A mixture of dichlorohydrin polyethylene glycol with the condensation product of dichlorohydrin aolyethylene glycol and diethylenetriamine is known as "ethamine 06." Etamin 06 is dissolved in water for mixing mortar or concrete mixture, and then these mixtures are prepared by conventional methods. In order to obtain the proposed mixture, four compositions were prepared with boundary and optimum content of the ingredients of the mixture.

The compositions of mortar mixtures are presented in table. one

After preparation of the mortar mixes, the increase in plastic strength was investigated.

Samples after 2 hours of incubation were steamed at 80 ° C for 8 hours according to the mode (3 + 3 + 2).

Table 1

The test results are given in table. 2 The results of the studies show that the addition of etamine 06, a plasticizer mixture solution, simultaneously accelerates the increase in plastic strength. In addition, in the formula of the invention

Concrete mixture, including mineral in the concrete, aggregates, water, and an additive, characterized in that, in order to increase the strength of concrete after heat treatment and increase its density, it contains as an additive a condensation product of dihydroxyethylene glycol with diethylenetriamine and dihydrochloride polyethylene glycol in the following ratio components of the mixture, in weight. %:

There is no decrease in strength after steaming from known plasticizing agents, for example, MDB. The addition of etamine 06 also reduces water absorption and capillary leakage of mortars and concrete.

table 2

Mineral to Harvest5-30

Filler60-80

Additive0.05-0.3

WaterEverything

Sources of information taken into account during the examination of the application:

1. USSR author's certificate No. 381630, cl. From 04В 13/24 07.13.71 (prototype).

2. V. Ratinov, T. I. Rosenberg. “Concrete Additives, M., Stroyizdat, 1973, p. 129.