A3.5 B05 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 A3.5B05 autoclaved aerated concrete blocks and its preparation, which can solve the problems of few building materials enterprises, achieve high SiO2 content, fast digestion speed, and inhibit digestion The effect of the reaction

Active Publication Date: 2016-02-24
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 few building material enterprises that can adapt measures to local conditions and produce A2.0B04 and A3.5B05 grade autoclaved aerated concrete blocks and thin blocks in large quantities and with a high pass rate in combination with local actual conditions.

Method used

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  • A3.5 B05 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof
  • A3.5 B05 grade autoclaved aerated concrete block prepared from quartz weathered sand and method thereof
  • A3.5 B05 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 are measured with a belt scale at a mass ratio of 100:6.2, 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 is 7:1) to obtain a fineness of 26% slurry with a concentration of 62.0% by mass; crush quicklime and ball mill to prepare quicklime powder with a fineness of 12%, a digestion time of 9min, a digestion temperature of 81°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 below is that after the leftover waste in the following enters the circulating water, the density formed by stirring is 1.28g / cm 3 The main components of the mixture include water, quartz weathered sand and silica provided b...

Embodiment 2

[0048] Quartz weathered sand and phosphogypsum were measured with a belt scale at a mass ratio of 100:6.5, and mixed with water and waste slurry (the flow ratio of water and waste slurry was 7.2:1) to obtain a fineness of 25% and a mass percentage concentration of 62.3% slurry; crush quicklime and ball mill to prepare quicklime powder, the fineness is 12%, the digestion time is 12min, the digestion temperature is 82°C, the mass fraction of A(CaO+MgO) is 76%; the water and aluminum powder paste are mixed in a mass ratio of 9 : 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 1.25g / 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 hydroxide formed by hydration re...

Embodiment 3

[0053]Quartz weathered sand and phosphogypsum were measured with a belt scale at a mass ratio of 100:7, 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 7.5:1) to obtain a fineness of 27%, mass percent concentration of 62.2% slurry; crushed quicklime, ball milled to prepare quicklime powder, fineness 11%, digestion time 12min, digestion temperature 81 ℃, A(CaO+MgO) mass fraction 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 1.26g / 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 hydra...

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Abstract

The invention provides A3.5 prepared from quartz weathered sand? B05 grade autoclaved aerated concrete block is A3.5 made of quartz weathered sand, cement, quicklime, industrial waste phosphogypsum, aluminum powder paste and water. B05 grade high performance autoclaved aerated concrete block. The dry density of the block is 509kg / m3, the average cubic compressive strength is 3.6MPa, the minimum value of a single group is 3.2Mpa, the splitting pressure ratio is 0.20, the mass loss after freezing is 2.8%, the strength after freezing is 3.1MPa, and the thermal conductivity (dry state) is 0.1251 W / (m·K), drying shrinkage value (standard method) 0.32mm / m, pass rate> 98%. The invention has reasonable raw material processing method, scientific formula calculation, simple production process and recyclable production waste. The block is a new type of energy-saving and environment-friendly wall material, which can be produced industrially.

Description

technical field [0001] The invention relates to an A3.5B05 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 generate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/06C04B22/04C04B22/14
CPCC04B28/10C04B40/024C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B14/06C04B22/144C04B22/04C04B38/02
Inventor 张晓东陶加林钟颂陈洁周宜
Owner HUBEI YITONG CONSTR ENG CO LTD
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