SU1738779A1 - Concrete mixture and a method of its preparation - Google Patents

Abstract

Using1 preparation of concrete mixtures with complex additives, The essence of the invention: the concrete mixture includes,%: mineral substance, 12.24-19.54; sand 17.96-22.79; crushed stone 55.69-58.96; sulphite-yeast brew (on a dry basis) 0.027-0.047; a powdered brown coal based product based on high molecular weight hydroxycarboxylic acids, mol.m. 250-5000 0,010-0,021, - and water the rest. Concrete mix is prepared by mixing mineral in the tare, sand, rubble and water in the amount of 50-90% of its total consumption with sulphite-yeast mash for 1-2 minutes, then the rest of the water is added with the brown coal treatment product with alkali. concrete mix 4 cm; concrete compressive strength after TVO at the age of 28 days 64.07 MPa; concrete frost resistance 550 cycles; water impermeability of concrete 0.8 MPa, 2 seconds f., table 2. cl

Description

The invention relates to construction materials, in particular, to the compositions of concrete mixtures and methods for their preparation used in the manufacture of concrete and reinforced concrete products and structures.

The purpose of the invention is to increase the mobility of the concrete mix of frost resistance, water resistance and water resistance of concrete.

Concrete mix is prepared by mixing Portland cement M-400, river sand with Mkr 1.5, granite rubble 5-10 and 10-20 mm in a ratio of 1.1.5 and mixing water with additives or initially mix Portland cement, sand, crushed stone and water in an amount of 50-90% of its total consumption with a sulphite-yeast mash for 1-2 minutes, and then the remaining part of the water is mixed with the product of processing of brown coal with alkali, comprising, by mass%: caustic soda 16-24; high molecular hydroxycarboxylic acids (humic, hymatomelanic, fulvic acids), mol. 250-5000 28-32; water 28-32; mineral inclusions (glucose, mica) else, and the mixture is stirred until a homogeneous mass is obtained.

The compositions of concrete mixtures and their preparation according to the known and proposed methods are presented in table. 1, and the physicomechanical indicators of concrete mixes and samples are given in Table 2.

Xi

SA) ° H

ivl

i4 Yu

Claims (1)

1. A concrete mix comprising a mineral in the gnawing sand, crushed stone, a sulfite yeast brew, an air entraining admixture and water, characterized in that, in order to increase the mobility of the concrete mix, waterproofness and frost resistance of concrete, it contains as an air entraining additive powdered carbon alkaline reagent based on the sodium salt of humic acids in the following ratio, wt.%: Mineral to gore 12,24-19,54 Sand 17,96-22,79 Scheoje.n55.69-58,96 Sulfite Yeast 0 five mash (dry substance) 0,027-0,047 The specified additive 0,010-0,021 VodyEstalny 2, A method for preparing a concrete mix, which includes mixing of mineral in the binder, sand, rubble, sulphite-yeast brewing and water, which first mix the mineral in the bristle and water in an amount of 50-90% of its total consumption with sulphite a yeast cream for 1-2 minutes, and then the remaining part of the water is introduced into which powdered carbon-alkaline reagent based on the sodium salt of humic acids is additionally introduced. Note. In Examples 1,2, -6,8-10, and 12, the concrete mix is prepared by, followed by the introduction of process water. 20 mixing components table 2