Production process for low-cost autolaved aerated concrete blocks

A concrete block and production process technology, applied in the field of building materials, can solve the problems of large power consumption, etc., and achieve the effects of reducing material shrinkage, low salt content, and low production costs

Inactive Publication Date: 2015-10-21
江苏中技新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the production cost of sand aerated concrete blocks in existing production, CN 101713229B uses copper ore tailings to replace part of quartz sand, but both copper ore tailings and quartz sand need to be ground before use, and CN 101713229B requires Grinding to 180 mesh can be used, but because the texture of quartz sand itself is relatively hard, it needs to consume a lot of electric energy in the process of crushing and grinding

Method used

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  • Production process for low-cost autolaved aerated concrete blocks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare materials:

[0022] Weigh by weight: 18 parts of No. 32.5 cement, 29 parts of quicklime, 7 parts of gypsum, 19 parts of fly ash, 35 parts of water, 32 parts of 50-100 mesh lake sand, 1 part of water reducing agent, 0.135 parts of aluminum powder;

[0023] The water reducer is composed of MNC-AS amino high-efficiency water reducer and MNC-PCP polycarboxylate water reducer, wherein the weight ratio of the two is 1:1;

[0024] Sand aerated concrete block production steps:

[0025] 1) Lake sand pretreatment: wash the natural lake sand fully with water, dry it in the sun, then crush and sieve to 50-100 mesh;

[0026] 2) Take No. 32.5 cement, quicklime, aluminum powder, and treated lake sand in the weight ratio, add it to water and mix it evenly to form a slurry, then add water reducing agent and stir for 10 minutes at a speed of 100r / min, and finally add gypsum and fly ash , stir at 40°C, 200-300r / min for 0.5 hours to get the concrete slurry;

[0027] 3) pour the ...

Embodiment 2

[0030] Weigh by weight: 21 parts of No. 32.5 cement, 30 parts of quicklime, 8 parts of gypsum, 22 parts of fly ash, 37 parts of water, 38 parts of 50-100 mesh lake sand, 2 parts of water reducing agent, 0.135 parts of aluminum powder ;

[0031] The water reducer is composed of MNC-AS amino high-efficiency water reducer and MNC-PCP polycarboxylate water reducer, wherein the weight ratio of the two is 1:1;

[0032] Sand aerated concrete block production steps:

[0033] 1) Lake sand pretreatment: wash the natural lake sand fully with water, dry it in the sun, then crush and sieve to 50-100 mesh;

[0034] 2) Take No. 32.5 cement, quicklime, aluminum powder, and treated lake sand in the weight ratio and mix them into water to form a slurry, then add water reducing agent and stir at 200r / min for 10 minutes, and finally add gypsum and fly ash , stir at 40°C and 300r / min for 0.5 hour to get the concrete slurry;

[0035] 3) pour the concrete slurry into the concrete block brick mold...

Embodiment 3

[0038] Prepare materials:

[0039] Weigh 19 parts of No. 32.5 cement, 29 parts of quicklime, 8 parts of gypsum, 20 parts of fly ash, 36 parts of water, 1280 parts of 50-100 mesh lake sand, 0.135 parts of aluminum powder, and 1.5 parts of water reducing agent according to the weight ratio;

[0040] The water reducer is composed of MNC-AS amino high-efficiency water reducer and MNC-PCP polycarboxylate water reducer, wherein the weight ratio of the two is 1:1;

[0041] Sand aerated concrete block production steps:

[0042] 1) Lake sand pretreatment: wash the natural lake sand fully with water, dry it in the sun, then crush and sieve to 50-100 mesh;

[0043] 2) Take No. 32.5 cement, quicklime, aluminum powder, and treated lake sand in the weight ratio and mix them into water to form a slurry, then add water reducing agent and stir at 200r / min for 10 minutes, and finally add gypsum and fly ash , stir at 40°C and 200r / min for 0.5 hour to get the concrete slurry;

[0044] 3) pour ...

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Abstract

The invention discloses a production process for low-cost autolaved aerated concrete blocks. The low-cost autolaved aerated concrete blocks are prepared from the following raw materials by weight: 18-21 parts of 32.5# concrete, 29-30 parts of unslaked lime, 7-8 parts of gypsum, 19-22 parts of pulverized fuel ash, 35-37 parts of water, 126-130 parts of lake sand with 50-100 meshes, 0.135 part of aluminium powder, and 1-2 parts of water reducing agents. Lake sand is adopted to replace quartz sand, and the prepared autolaved aerated concrete blocks are low in cost, good in compressive strength which is as high as 6.2 MPa, and small in shrinkage value which is 0.40 mm / m or below.

Description

technical field [0001] The invention belongs to the field of building materials and specifically designs a low-cost sand aerated concrete block production process. Background technique [0002] The Twelfth Five-Year Plan for National Economic and Social Development pointed out that my country’s urbanization rate was 47.5% in 2010, and will maintain an annual growth rate of 0.8% during the “Twelfth Five-Year Plan” period, and will reach 51.5% by the end of the “Twelfth Five-Year Plan”. %. my country's urban and rural new construction area is 2 billion to 3 billion square meters per year 2 , about 43 billion m of existing buildings 2 . The demand for air-entrained concrete blocks continues to increase, but the price has remained high. In order to reduce the production cost of sand aerated concrete blocks in existing production, CN 101713229B uses copper ore tailings to replace part of quartz sand, but both copper ore tailings and quartz sand need to be ground before use, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/14C04B14/06
Inventor 胡祖升
Owner 江苏中技新型建材有限公司
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