SU814931A1 - Concrete mix - Google Patents

Description

one

The invention relates to building materials, namely, compositions of concrete mixtures containing cement, aggregate, complex additive and water.

A known concrete mixture containing cement, aggregate, water, and a complex additive of a hydrophobic-plasticizing type is an emulsion of bottoms of synthetic fatty acids in an aqueous solution of sulphite-yeast mash 1.

The disadvantage of the complex additive is the use of a water-insoluble product obtained from the oxidation of paraffin and consisting mainly of saturated fatty acids, which makes them incapable of addition reactions and, consequently, polymerization reactions. (polymerization of the additive in the pores of the concrete causes an increase in the structural strength of the concrete). In addition, the preparation of additives difficult to implement.

The NSb closer to the proposed technical essence and the achieved result is a concrete mix, including cement, aggregate, water.

sulphite-yeast mash and stock of vegetable oil. The ratio between sulphite-yeast brewing stock and stock is 1: 1 2.

A disadvantage of the known mixture is the conventional structural strength of concrete, which can be characterized by the ratio of the flexural strength

0 to compressive strength / as well as unsatisfactory water experience of concrete.

The purpose of the invention is to increase the constructive strength of concrete and reduce the concrete absorption.

This goal is achieved by the fact that the concrete mix, containing cement, aggregate, water, sulphite yeast mash and vegetable oil soapstock, additionally contains manganese-lead or manganese-lead-cobalt sikkativ in the following ratio of components, wt.%:

five

10.0-25.0

Cement 70.0-85.0 Aggregate Sulfite-yeast0, 005-0.08 chewed mash

Soap stock vegetable oil 0,003-0,05

0

Manganese Lead Desiccant or

manganese-lead0, 00003-0.001

cobalt

Water Rest

Soap stock is the treatment products of the corresponding oils alkali. The main component of soap stock is sodium salts of unsaturated fatty acids (60-70%), as well as esters of glycerols of these acids (3040%). For soapstocks of drying and semi-drying vegetable oils during heat treatment, polymerization reactions along double bonds in an open chain are characteristic. The desiccants introduced into soap stock activate the Progress of three-dimensional cross-linking of its molecules. A crystallization-polymerisation three-dimensional structure of the cement stone and the contact zone of the cement cams with a core is created. A qualitatively new type of structure contributes to an increase in density, strength, and a decrease in the integral

POSITIONS.

The concrete mix is prepared as follows.

The desiccant is introduced into soap stock, for example Nrep, linseed oil. An aqueous solution of a sulfite yeast brew is then added and the mixture is homogenized for 5-10 minutes. The complex additive thus obtained is dissolved in the total mixing water (the water included in the composition of the additive is taken into account in the total amount of water from the wort). Then the aqueous solution of the complex additive is mixed in a concrete mixer with cement and aggregate until a homogeneous mass is obtained. In tab. 1 shows the composition of concrete mixes, in table 2 - physico-mechanical characteristics of concrete steamed by mode 4 + 2 + 6 + 2 (hours). Isothermal heating temperature.

As can be seen from the table. 2, the structural strength factor of the 2nd composition is 9.12: 48, 187 (for a known composition it is equal to 6.83: 46,, 143) while reducing water absorption by 39%.

Table

ten

 M-500

Filler (crushed stone granite, sand Mk-2,

Sulfite Yeast

mash

Soap stock vegetable

oils

Manganese-lead or manganese-lead cobaptine desiccant

Water

Properties

The mobility of the mixture, cm

Strength, MPa at a bend

when compressed Water absorption,%

18 77

25 70

0.022

0.08 0.05 0.022

0.001

4.956 4.869

table 2

Composition No.

1-2 1-2

1-2

9.12 8.9 6.83 48.6 42.8 46.2 2.91 3.27 4.05

Claims (2)

1. Higerov h M.I. and Bayer.V.E. fO Improving the properties of concrete with organic additives. Overview information VNINESN. P., 1975, pp. 31-43. 2. Higerovich M “And. et al. Improving the properties of building mortars using organic supplements. Structural and architecture of Uzbekistan, 1971, 8, pp.15-17.