SU1020395A1 - Concrete mix - Google Patents

Abstract

CONCRETE MIXTURE, including Portland cement, is a condensation product of methylol acetone with a1 hydrate (they, aggregate and water), and in order to intensify the hardening of the concrete in a moist environment, it also contains sodium nitrite in the following ratio of components, wt;%:. /, - -.,., Portland cement - 13-25 The condensation product of methylol acetone with ammonium hydroxide 0.02-0.121 Water7.8-13.7 i Sodium nitrite 0.13-0, 25 PlaceholderEverything Else (L

Description

The invention relates to building materials, namely, to compositions of concrete mixtures containing modifying additives. A well-known complex additive for concrete mixes, including the sodium salt of a copolymer of salicylic acid and formaldehyde -t-NaH02 + CaCl2, introduced in an amount of 0, 1 and by weight of cement C1 G |. Closest to the proposed technical essence and the achieved result is a concrete mixture comprising a concrete (Portland cement), aggregate, an additive - the product of the interaction of methylol acetone with and water. The ratio between portland cement and admixture, respectively, is 99, U – E, 9, and 0.1–0.3 ma.IC2 A disadvantage of the known solutions is a slight intensification of the hardening of the concrete in a moist environment. The purpose of the invention is to intensify the hardening of concrete in a wet environment. The goal is achieved by the fact that the concrete mixture, including Portland cement, the condensation product of methylol acetone with ammonium hydroxide, aggregate and water, additionally contains sodium nitrite in the following ratio, wt.%: Portland cement 13-25 Metallolacetone condensation product c. ammonium hydroxide 0; 02-0.121 Water7.8-13.7 Sodium nitrite 0.13-0.25 Aggregate Remaining The complex additive is introduced into the concrete mixture directly into the mixing water in an amount of: a condensation product of methylol acetone with IPHON 0.15-0, 3 by weight of cement in terms of solid; NaNO ™ 1-3% by weight of cement. The additive is used to prepare concrete, for example drilling piles, produced by the method of a vertically rising pipe. The hardening of concrete drilling piles occurs in a water-saturated and humid environment. The compositions of the concrete mixture are given in table. 1. The composition of the concrete mixture with the addition of the condensation product of methylol acetone with is given in table. 2. We carry out comparative tests of the intensity of the strength of the proposed and known concrete mixes. The results are shown in Table. 3. The proposed concrete mixture is characterized by the fact that in the early periods of hardening it gains more intensively than in the prototype hardening strength in a humid environment: the compressive strength of the samples at 3, 7 and k days. aged by more than the strength of the prototype. Increasing the mobility of the breathing mix saves cement by 17-25%. The concrete mix can be used to make drilling piles that harden in an aqueous and water-saturated environment.

The condensation product of methylol acetone with

NaN02

Water

Aggregate

0.038 0.066 0.095 0.121 0.160.190.220.25

8.8 10.5 12.213.7

75,0027Q, 2kk65,8560,929

The strength of the samples in compression., MPa, when curing them in a humid environment, through

Table 3

Claims (1)

CONCRETE MIXTURE, including Portland cement, a condensation product of methylolacetone with ammonium hydrate, aggregate and water, such as that, in order to intensify the hardening of concrete in a humid environment, it contains additional sodium nitrite in the following ratio of components, wt.%:. Portland cement 13-25 Condensation product methylolacetone c hydrate oxide ammonium 0.02-0.121 Water '7.8-13.7 in Sodium nitrite 0.13-0.25 © Aggregate Rest ω