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A2.0 B04 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof

A technology of quartz weathered sand and concrete blocks, which is applied in the field of A2.0B04 autoclaved aerated concrete blocks and its preparation, can solve the problems of few building materials enterprises, achieve high SiO2 content, inhibit digestion reaction, and large specific surface area Effect

Active Publication Date: 2017-01-11
HUBEI YITONG CONSTR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few building material enterprises that can adapt to local conditions and produce A3.5 B05, A2.0 B04 grade autoclaved aerated concrete blocks and thin blocks in large quantities and with a high pass rate

Method used

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  • A2.0 B04 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof
  • A2.0 B04 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof
  • A2.0 B04 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Quartz weathered sand and phosphogypsum were measured with a belt scale at a mass ratio of 100:9.6, and transported to the feed port of the ball mill, and mixed with water and waste slurry (the flow ratio of water and waste slurry was 6.7:1) to obtain a fineness of 24% slurry with a mass percentage concentration of 61.5%; crush quicklime and ball mill to prepare quicklime powder with a fineness of 9%, a digestion time of 11min, a digestion temperature of 82°C, and a mass fraction of A(CaO+MgO) of 78%; water and The aluminum powder paste is stirred evenly at a mass ratio of 9:1 to form an aluminum paste. The fineness is the mass percentage of the sieve residue of the dry material passing through the 180-mesh standard inspection sieve. The waste slurry described in the following is that after the leftover waste enters the circulating water, the density formed by stirring is 1.27g / cm 3 The main components of the mixture include water, quartz weathered sand and silica prov...

Embodiment 2

[0049] Quartz weathered sand and phosphogypsum were measured with a belt scale at a mass ratio of 100:9.6, and mixed with water and waste slurry (the flow ratio of water and waste slurry was 6.7:1) to obtain a fineness of 23% and a mass percentage concentration of 61.8% slurry; crush quicklime, ball mill to prepare quicklime powder, the fineness is 10%, the digestion time is 12min, the digestion temperature is 83°C, the mass fraction of A (CaO+MgO) is 77%; : 1 Stir evenly to form aluminum paste. The fineness is the mass percentage of the sieve residue of the dry material passing through the 180-mesh standard inspection sieve. The waste slurry is the density of 1.26g / cm formed by stirring after the leftovers in the following enter into the circulating water 3 The main components of the mixture include water, quartz weathered sand and silica provided by cement, lime and calcium hydroxide formed by hydration reaction of calcium oxide in cement, and calcium silicate hydrate.

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Embodiment 3

[0054] Quartz weathered sand and phosphogypsum were measured with a belt scale at a mass ratio of 100:9.6, and transported to the feed port of the ball mill, and mixed with water and waste slurry (the flow ratio of water and waste slurry was 6.7:1) to obtain a fineness of 23% slurry with a concentration of 60.9% by mass; crush quicklime and ball mill to prepare quicklime powder with a fineness of 9%, digestion time of 10min, digestion temperature of 84°C, A(CaO+MgO) mass fraction of 80%; water and The aluminum powder paste is stirred evenly at a mass ratio of 9:1 to form an aluminum paste. The fineness is the mass percentage of the sieve residue of the dry material passing through the 180-mesh standard inspection sieve. The waste slurry is the density of 1.25g / cm formed by stirring after the leftovers in the following enter into the circulating water 3 The main components of the mixture include water, quartz weathered sand and silica provided by cement, lime and calcium hydro...

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Abstract

The invention discloses an A2.0 B04 grade autoclaved aerated concrete block prepared from quartz eroded sand. The A2.0 B04 grade high-performance autoclaved aerated concrete block is prepared from quartz eroded sand, cement, quick lime, industrial waste phosphogypsum, aluminum paste and water. The dry density of the concrete block is 415kg / m<3>, the cube crushing strength average value is 2.1 MPa, the single unit minimum value is 1.9 MPa, the ratio of splitting tensile is 0.19, the frost quality loss is 3.7%, the frost strength is 1.7 MPa, the heat conductivity coefficient (dry state) is 0.116 W / (m.K), the dry shrinkage value (standard value) is 0.22 mm / m and the percent of pass is greater than 98%. The raw material processing method is reasonable, the formula calculation is scientific, the production process is simple and the production waste can be recycled. The concrete block is a novel energy-saving and environmentally-friendly wall material and is suitable for industrial process.

Description

technical field [0001] The invention relates to an A2.0 B04 grade autoclaved aerated concrete block prepared from quartz weathered sand and a preparation method thereof, belonging to the field of new energy-saving and environment-friendly wall materials. Background technique [0002] Quartz weathered sand is formed after natural quartz has been weathered for millions of years. Its original crystal form is transformed into fine grains, and some of them are transformed into amorphous. The main component is silicon dioxide (SiO 2 ), containing a small amount of alumina (Al 2 o 3 ), potassium oxide (K 2 O), iron oxide (Fe 2 o 3 ) and calcium oxide (CaO). The main role of quartz weathered sand in the production process of autoclaved aerated concrete blocks is to provide SiO 2 , its mineral composition is complex, the most abundant is quartz, followed by feldspar, mixed with mica, carbonate, clay, etc., which also contains a certain amount of Na 2 O and K 2 O, they generat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/14C04B14/06
Inventor 张晓东陶加林钟颂陈洁周宜
Owner HUBEI YITONG CONSTR ENG CO LTD
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