SU893943A1 - Raw mixture for producing porous concrete - Google Patents

Description

(54) RAW MATERIAL MIXTURES FOR MANUFACTURING GAS CONCRETE

The invention relates to compositions of aerated concrete mixes and can be used in the building materials industry. The well-known raw mix, including a port of cement, volcanic ash, burnt lime, aluminum powder, sulfanol chlorine and water 1. The closest in technical essence and the achieved effect to the proposed is a cellular concrete mixture 2, comprising the following components, wt.%: 11 -21 Portlaid cement Ground quartz sand 26-41 9-14 Lime 0.15-0.27 Aluminum powder 6.001-0.03 Alkylsulfanol 1.2-1.7 Sodium chloride Rest A known material is characterized by compressive strength 0.45-0, 48 MPa, volume weight 200 kg / m and coefficient of design manual quality 113-120. The disadvantage of this composition is the relatively low coefficient of constructive quality. The purpose of the invention is to increase the coefficient of constructive quality. The goal is achieved by the fact that the raw mix, including Portland cement, quartz sand, lime, aluminum powder, additives and water, contains Ferrosilicon and Azrosil as additives in the following ratio of components, wt.%: Portland cement 10-26 Quartz sand 18-45 Lime 9-20 Aluminum powder 0.05-0.1 Ferrosilicon0.005-0.01 Aerosil 0.05-0.2 WaterEmerging Example. The gas betets from the mixture are prepared as follows. In the future, milling of the crumbling component, for example, sand, lime, aerosil, ferro-, is obtained. ui Ud. surface,

.1500-3000 5000-10000 2000-10000 14922-77

Next, the resulting lime-sand in the live intensively mixed with Portland cement, aerosil and ferrosilicon, water and aluminum powder. The mixture thus obtained is ready for use for the preparation of aerated concrete products.

The mixture is poured into metal molds, where mass swelling occurs due to the reaction of aluminum powder with slaked lime. The swelling and, correspondingly, the reduction of the bulk mass (aerated concrete, is promoted by ferrosilicon, which, on the one hand, reacts with an alkaline component and forms hydrogen.

2512 0.1

26 18 14

3715 0.07

Claims (2)

43 47 0.05 Coefficient of constructive quality volumetric mass. Shriev's formula for fabricated gas products comprising Portland cement, quartz sand, lime, aluminum powder, additives and water, characterized in that, in order to increase the structural quality, it contains ferrosilicon and aerosil in the following ratio of components, weight .%: Portland cement 10-26 Quartz sand 18-45 on the other hand, the silica liberated by the reaction forms calcium hydrosilicates with calcium oxide hydrate. This reaction occurs at normal temperature. conditions for forming the mixture, i.e. without its special heating. Formed pylori-icates strengthen micropore walls. In order to increase the amount of calcium hydrosilicate formed, aerosil - amorphous active silica is introduced. Next, the mixture is subjected to heat treatment, for example in aktoklava. In the process of heat treatment of the products, the formed hydrosilicates are recrystallized into tobormorite hydrosilicates, which leads to an increase in the strength of aerated concrete. The table shows the properties of aerated concrete from the proposed raw mix. 0.2 0.45-0.48 113-120 quotient of dividing strength per square 9-20 Lime 0.05-0.1 Aluminum powder 0.005-0.01 Ferro-slit 0.05-0.2 AerosilOstal Water Sources of information into account in the examination 1. If 409985 USSR author's certificate,. From 04 To 15/02, 1972. 2. USSR author's certificate number 682469,. From 04 To 13/22, 1978.