SU966066A1 - Concrete mix - Google Patents

Description

The invention relates to construction and construction materials, namely, concrete mixtures on mineral water.

A concrete mix is known, including cement, aggregate, water, and plasticizer additive, water-soluble polymer VRP-1, introduced in an amount of 0.005-0.01% by weight of cement. The introduction of this additive makes it possible to increase the strength of concrete by no more than 10–15% and its density 1.2 times tl.

Closest to the proposed technical essence and the achieved result is a concrete mix, including Portland cement, aggregate (sand), water, and an additive. hydroquinone in an amount of 0.1-0.75% by weight of cement. The additive slows the setting of the concrete mix 2.

The disadvantages of this mixture are low workability and low strength of the resulting material.

The aim of the invention is to improve the workability of the mixture while maintaining the strength of concrete.

This goal is achieved by the fact that the concrete mixture, including Portland cement, water, hydroquinone and aggregate, contains the indicated components at their next ratio, percent by weight: Portland cement 10-25

5 Water5-10

Hydroquinone 0,002-0,02 Placeholder The Rest. Hydroquinone additive has the form, 0 W

(OY

The method of preparing the concrete mix is conventional and involves the simultaneous mixing of all the components with the additive.

Concrete and mortar mixtures are prepared containing the known and proposed additives in the specified

20 quantities using a granite fraction of 5–20 mm and silica sand with a grain size of 1.9.

Of these mixtures, 25 samples of 10x10x10 cm in size are prepared, part of KOTOiMX hardens under normal temperature and humidity conditions, and part of them are steamed in the mode of 2 + 3 + 6 + + 2 h (pre-exposure +

30 temperature rise + isothermal

aging + cooling) at maximum temperature ..

The table shows the composition of the concrete snake and their physico-mechanical properties.

Examples 3 relate to compositions of concrete mixtures without additives (control) Topics. tab.)

Examples 1-6 concern the compositions of concrete mixtures with an additive / prototype (see table).

Examples 7-9 concern (compositions of concrete mixes with the offer (s additive (see table).

The concrete mixture offered is characterized by good workability, it can be used both in the production of precast concrete and in monolithic construction.

land cement,, water, hydroquinone and aggregate, different from; 40 in order to improve the workability of the mixture while maintaining the strength of concrete, it contains these components with the following

Ratio, wt.% 5 .45

Portland cement 10-25

. . Water 5-10

Sources of information taken into account in the examination

1. USSR author's certificate number 389050, cl. From 04 To 13/24, 1971.

. 2. Your S.M. and others. Fast-setting cement mortars with organic additives. - Veton and iron / concrete, No. 7, 1969, p. 44-45 ..

Claims (1)

Claims g Concrete mixture comprising Portland cement. water, hydroquinone and aggregate, characterized in (40 in that, in order to increase the workability of the mixture while maintaining the strength of concrete, it contains these components in the following '. ratios, wt.%:' Portland cement 10-25. Water 5-10 Hydroquinone 0.002-0.02. Aggregate Else.