RU1807033C - Concrete mixture - Google Patents

Abstract

Usage: concrete mix intended for the manufacture of building materials and structures, as well as in monolithic construction. The inventive concrete mixture, including Portland cement, a sodium plasticizer-based superplasticizer of the condensation product of naphthalene sulfonic acid with formaldehyde, an organosilicon compound, aggregate and water, contains as a filler a soil with a content of 5-25% clay particles in the following components, wt.%: Portland cement 8.55-18.174. A superplasticizer based on the sodium salt of the condensation product of naphthalenesulfonic acid with formaldehyde 0.65-2.133, sodium styryl silicate 0.043-0.050, said soil 72.384-85.597, the rest is water. Physico-mechanical properties of concrete samples: compressive strength Rszh. 10.7-31.5 MPa; bending strength Rieg. 2.0-3.3 MPa; frost resistance F 50-155 cycles. 2 tab.

Description

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The invention relates to compositions of concrete mixtures containing soil and additives as aggregate, and can be used for the manufacture of building materials and structures, as well as in monolithic construction in areas with difficult delivery of stone aggregate materials.

The purpose of the invention is to increase the strength and frost resistance of concrete.

In the present invention, cement is first mixed with the soil, partially mixed with water, then after 4-5 minutes a superplasticizer with sodium ethyl silicate is introduced.

After mixing all the components to a homogeneous mass, samples are made from the resulting concrete mixture.

The compaction of the soil-concrete mixture is carried out on a standard vibration damping device for 30-35 minutes. Sample hardening

they are carried out for 28 days in a normal-humidity chamber (in water), after which the samples are subjected to a test to determine the properties of the soil-concrete mixture according to GOST 10180-78.

Characteristics of the materials used:

Portland cement M 500 - soil with clay particles 25-5% of the total soil mass;

superplasticizer C 4 - Na-salt of the product of condensation of naphthalenesulfonic acid with formaldehyde; sodium ethylsiliconate ПЖ-11.

Table 1 shows the composition of the concrete mix,

In Examples 1,2,3, the amount of clay particles is 5%, 15% and 25%, respectively.

Table 2 shows the properties of the concrete composition in terms of strength and frost resistance.

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Claims (1)

SUMMARY OF THE INVENTION A concrete mixture comprising Portland cement, a sodium plasticizer-based superplasticizer of the condensation product of naphthalene sulfonic acid with formaldehyde, an organosilicon compound, aggregate and water, which include, in order to increase the strength properties and frost resistance of concrete, it contains as an organosilicon compound, sodium ethylsiliconate, and as a filler, a soil with a content of 5-25% clay; Physicomechanical properties of concrete samples particles in the following contents components, wt.%: Portland cement 8.55-18.174 Superplasticizer, based on the sodium salt of the condensation product of naphthalenesulfonic acid with formaldehyde Sodium Ethyl Siliconate Specified Primer Water 0.65-2.133 0.043-0.050 72.384-85.597 Else Table 1 table 2