SU1414831A1 - Raw mixture for manufacturing lime-and-sand brick - Google Patents

Abstract

The invention relates to the industrial construction materials and can be used in the manufacture of lime-silica products, such as bricks. The purpose of the bead is to increase strength. The raw material mixture for the manufacture of silicate brick has a composition, wt.%: Lime 8-12, volcanic ash 22-28, waste thermal extraction of oil-containing soils 60-70. The mixture provides compressive strength of 22.3-25 MPa, bending 3.1–4.2 MPa, water absorption 9.7–10.5%, bulk density 1596–1620 kg / m, and frost resistance 25 cycles. 1 tab. $ (Oh with

Description

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The invention relates to the industrial construction materials and can be used in the manufacture of a research institute of lime-silica products, such as bricks.

The purpose of the invention is to increase the strength.

Example. Use the following materials; lime with an activity of 80% and a specific surface area of 4500 and volcanic ash with a specific surface area of 1600 cM Vr, represented by a granular, cemented gray rock. The content of volcanic glass in it varies in the range of 15-50%, on average was 27%. Volcanic ash has the following chemical composition: wt%: SiOi 62.9-66.08; 18.23-16.27}, j 3.09-4.53, CaO 4.27-3.64; MgO 2.13-1.52; SOj 0.31-0., 34; 6.8-6.6; Item rest.

Waste thermal extraction of oil-containing soils (soil-aleurite) is formed when oil is extracted from oil-bearing soil thermally at 700-720 ° C and is a bulk material with a particle content less than 0.14 mm 85-90% and a specific surface 1600 / g, V its mineralogical composition is dominated,% t slightly amorphized from the surface of quartz 65-70; slightly modified calcite 10-15; dehydrated amorphized clay 15-20. In terms of particle size, it corresponds to aleurite, and in terms of chemical composition, it corresponds to dehydrated carbonate-clay.

that-siliceous rocks and contains wt.%: SiO-j 70-75; 2-8; FejOg 2.5-5, CaO 4-9; MgO 0,863 0.4 0.6j NajO + K O 0.95-2.9; Item the rest.

Raw mixes are prepared as follows.

The withdrawn dry components are mixed, moistened to a molding moisture of 10%, the samples are molded at a pressure of 16 MPa and subjected to their autoclave treatment at a pressure of 8 atm according to the mode 2 + 8 + 2 hours.

The compositions and properties of mixtures for the manufacture of silicate bricks are given in the table.

Claims (1)

Invention Formula A raw material mixture for making silicate bricks, including lime, volcanic rock and burning rock, is characterized in that, in order to increase its strength, it contains volcanic ash as a volcanic rock, and waste from thermal extraction of oil-bearing soils as a volcanic rock the following ratio of components, wt,%: Lime8 - 12 Volcanic ash22-28 Waste thermal extraction of oil-containing soil Nyx60 - 70