SU1491858A1 - Initial composition for making lightweight concrete - Google Patents

Abstract

The invention of a composition for making lightweight concrete, relates to the building materials industry, in particular, and can be used to make non-autoclaved building products - partition walls, blocks, panels, etc. To increase strength, reduce shrinkage deformations, and also reduce the time of heat and humidity treatment the raw mix for the manufacture of lightweight concrete contains, wt%: lime 6.0-8.5

gypsum 1.0-3.0

tuff fraction of 0.005-5 mm 15-20

tuff fraction 0,001-0,005 mm 12-18

volcanic slag fraction of 0.001-5 mm 5-10

5-20mm volcanic slag fraction 20-34.5

water the rest. The strength of concrete is 3.8-4.0 MPa, shrinkage deformations 0.46-0.48 mm / linear meters, the time of heat-moisture treatment is 10 hours. 2 tab.

Description

The invention relates to the industry of building materials, namely, the composition of the raw mix for the manufacture of non-autoclaved building products, such as partition walls, blocks, panels, and the like.

The purpose of the invention is to increase the strength, reduce shrinkage deformations and shorten the time of heat and moisture treatment.

71l of the preparation of the raw mix uses tuff, the chemical composition of which is given in Table 1, as well as volcanic galak, the chemical composition of which is given in Table 2.

Technologists preparing the proposed composition.

The tuff of fractions with particle sizes of 0.001-0.005 mm, the slag fractions with particle sizes of 0.001-5 mm, lime and gypsum are mixed together firstly dry for 1 minute, then with a part of water for 2-3 minutes. After that, slag fraction 5-20 mm, tuff fraction 0.005-5 mm, the rest of the water and stirring is continued for another 2-3 minutes. The finished mixture is poured into molds, vibrates and is subjected to steaming according to the mode: temperature rise up to 2 hours, held at 90 ° C

4i

;about

eo

6 h, decrease in temperature 2 h (10 hours in total).

The compositions of the proposed raw material mixture (f - 4) and with the beyond the limits of the components (5.6) are listed in Table 3, the properties of the compositions are given in Table 4.

Claims (1)

Invention Formula Raw mix for the production of lightweight concrete, including lime, gypsum, tuff fraction of 0.005-5 mm and water, characterized in that, in order to increase strength, reduce shrinkage deformation and shorten the time of heat and moisture treatment, it also contains the tuff fraction of 0.001-0.005 mm and volcanic slag fractions of 0.001-5 and 5-20 mm in the following ratio of components, wt.%: Lime6-8,5 Gypsum1-3 Tuff fraction 0.005-5 mm 15-20 Fine tuff fractions 0,0010, 005 mm 12-18 Volcanic slag fraction 0.001-5 mm 5-10 Volcanic slag fraction 5-20 mm Water 20-34.5 Else Table 1 0.001-0.005 61.11 0.005-560.10 11.02 14.30 9.51 3.791.706.92 0.90 13.72 10.70 3.51 1.86 7.01 It is tuff fraction with a particle size of 0.001-0.005 mm (sample 1) Tuff fraction with particle size of 0.005-5 mm (sample 2) Rest m table 2 14.0 16,0 11.0 20.0 18.0 20.0 13.0 21.0 Continuation of table 3