SU1276650A1 - Raw mixture for producing light-weight concrete - Google Patents

Abstract

The invention relates to building materials, in particular to compositions of light concrete mixes used in the manufacture of enclosing structures of buildings for various purposes. The invention provides for increasing the strength of concrete and reducing its coefficient of thermal conductivity, as well as the consumption of cement. The mixture for making lightweight concrete includes, wt%: cement 21.3-24.2, expanded clay gravel 57.6-64, expanded perlite sand with a density of 75-100 kg / m 3.2-4.6, expanded clay sand fractions of 1.2-5.0 mm density (L 700-800 kg / mz 8.6-17.8, saponified with: rosin

Description

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The Joint Venture "Invention relates to construction materials, namely to the composition of light concrete mixtures, and can be used in the production of building fencing for various purposes. The purpose of the invention is to increase the strength of concrete, reducing its coefficient of thermal conductivity. In the proposed mixture, a new type of aggregate in the form of sand of continuous grain-size composition is formed, in which the coarse-grained sand of the 1.2-5.0 mm fraction is represented by strong claydite sand, and the fine-grained - by particularly light expanded perlite sand. This ensures the creation of concrete of dense structure, increased strength with a reduced cement content and low coefficient of thermal conductivity. G1r11 Change saponified rosin in the amount of 0.001 wt.% Provides plasticization of the concrete mixture with the simultaneous porisation of cement-stone n. 0 The proposed mixture is prepared as follows. Porous aggregates (expanded clay garvia, expanded clay and perlite sand) are metered in volume, cement in weight, water, and rich rosin in volume. Claydite gravel, a mixture of porous sand and cement are loaded into the forced-action mixer for dry mixing for 1.5 minutes, then water is added and stirring is continued for 1 minute. After that, the organic rosin is added to the aqueous solution and the mixture is stirred for 1 minute. The finished mixture is discharged into the distribution hopper and placed in a pre-prepared form. The heat treatment of the samples is carried out in the following mode: the temperature rises up to within 8 hours and cools down within 4 hours. Examples of the compositions and physical and mechanical properties of the samples made from the known and proposed mixtures are shown in the table.

Based on the known raw material mixture. Based on the proposed raw mix.

Thus, keramzitoperlitobeton, prepared from the proposed raw mix, is characterized by increased strength, low density and better thermal properties. The application of the raw mix offers a reduction in cement consumption.

Invention Formula

Raw mix for making lightweight concrete, including cement, expanded clay gravel, expanded perlite sand and water, is different because, in order to increase the strength of concrete and reduce the coefficient of thermal conductivity, as well as cement consumption, it contains expanded perlite sand with a density of 75- 100 kg / cm and additionally expanded clay sandy tails; and 1.2-5.0 mm

density of 700-800 kg / m and saponified rosin (20% solution) in the following ratio of components, may.%:

21.3-24.2 57.6-64

3.2-4.6 t8, 6-17,8

0.001-0.0012 Else

Claims (1)

Claim The raw mix for the manufacture of lightweight concrete, including cement, expanded clay gravel, expanded perlite sand and water, is distinguished by the fact that, in order to increase the strength of concrete and reduce the coefficient of thermal conductivity, as well as consumption, cement, it contains expanded perlite sand with a density of 20 75-100 kg / cm ³ and additionally expanded clay sand of a fraction of 1.2-5.0 mm 1276650 4 with a density of 700-800 kg / m ³ and saponified rosin (20% solution) in the following ratio of components, May.%: Cement Expanded Clay Gravel Expanded 10 perlite sand with a density of 75100 kg / m ³ Expanded clay fractions of 1.2-5.0 mm with a density of 700 800 kg / m ³ Saponified rosin (20% solution) Water 21.3-24.2 57.6-64 3.2-4.6 8.6-17.8 0.001-0.0012 Rest'