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Air-entrained concrete added with industrial waste residue and preparation method thereof

A technology for aerated concrete and industrial waste residue, applied in the field of building materials, can solve the problems of high cost, unfavorable use of high-rise buildings, large proportion of blocks, etc., and achieve the effects of low drying shrinkage value, promotion of recycling, and high strength

Active Publication Date: 2016-01-20
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter cost is higher and the proportion of the blocks made is relatively large, which is not conducive to the use of high-rise buildings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: (1) Add 130 grams of ordinary Portland cement, 112 grams of setting base material, calcium hydroxide, 31 grams, and 33.5 grams of water into a mixer, and stir at a speed of 300-400 rpm for 3-5 minute;

[0017] (2) Mix 2 grams of UNF-5 type naphthalene-based superplasticizer of Beijing Muhu Building Materials Sales Company with 33.5 grams of water, stir evenly at 40-45 °C, and add it to the slurry in step (1), Stir at 500-600 rpm for 4-7 minutes;

[0018] (3) After mixing 0.5 g of tea saponin cement foaming agent, 1 g of cationic polyacrylamide, and 1.5 g of calcium nitrite, add it to the slurry in step (2), and stir at a speed of 700-800 rpm 3 to 5 minutes;

[0019] (4) Pour the slurry that has been stirred in step (3) into the mold, stop for half an hour, remove the mold, and cure at 15 to 19°C for 200 hours.

[0020] The base material for setting adjustment is sulfuric acid slag and coal gangue mixed and heated to 500-600 ℃ for 10-15 minutes; when the te...

Embodiment 2

[0022] Example 2: (1) 123 grams of ordinary Portland cement, 39 grams of sulfuric acid slag with a particle size of 20-40um, 26 grams of coal gangue with a particle size of 20-40um, and 39 grams of furan resin waste sand with a particle size of 20-40um , 27 grams of calcium hydroxide with a particle size of 6 to 8um, and 27.5 grams of water were added to the mixer, and stirred at a speed of 300 to 400 rpm for 3 to 5 minutes;

[0023] (2) Mix 2 grams of UNF-5 type naphthalene-based superplasticizer of Beijing Muhu Building Materials Sales Company with 27.5 grams of water, stir evenly at 40-45 °C, and add it to the slurry in step (1), Stir at 500-600 rpm for 4-7 minutes;

[0024] (3) After mixing 0.5 g of tea saponin cement foaming agent, 1 g of cationic polyacrylamide, and 1.5 g of calcium nitrite, add it to the slurry in step (2), and stir at a speed of 700-800 rpm 3 to 5 minutes;

[0025] (4) Pour the slurry that has been stirred in step (3) into the mold, stop for half an ...

Embodiment 3

[0027] Example 3: (1) 145 grams of ordinary Portland cement, 45 grams of sulfuric acid slag with a particle size of 20-40um, 30 grams of coal gangue with a particle size of 20-40um, and 45 grams of furan resin waste sand with a particle size of 20-40um , 33 grams of calcium hydroxide with a particle size of 6-8um, and 37.5 grams of water were added to the mixer, and stirred at a speed of 300-400 rpm for 3-5 minutes;

[0028] (2) Mix 3 grams of UNF-5 type naphthalene-based superplasticizer of Beijing Muhu Building Materials Sales Company with 37.5 grams of water, stir evenly at 40-45 °C, and add it to the slurry in step (1), Stir at 500-600 rpm for 4-7 minutes;

[0029] (3) After mixing 1 g of tea saponin cement foaming agent, 2 g of cationic polyacrylamide, and 3 g of calcium nitrite, add it to the slurry in step (2), and stir at a speed of 700-800 rpm 3 to 5 minutes;

[0030] (4) Pour the slurry that has been stirred in step (3) into the mold, stop for half an hour, remove ...

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Abstract

The invention relates to aerated concrete added with industrial waste residues. The concrete is prepared from the following components in parts by weight: 123-145 parts of common silicate cement, 104-120 parts of a thickening base material, 27-33 parts of calcium hydroxide with grain size of 6-8 mu m, 2-3 parts of an efficient water reducer, 3-6 parts of a composite foaming agent and 55-75 parts of water. The preparation method comprises the following steps: (1) adding common silicate cement, thickening base material, calcium hydroxide and half amount of water into a stirrer and stirring for 3-5 minutes; (2) mixing the efficient water reducer with the other half amount of water, uniformly stirring at 40-45 DEG C, adding into slurry in the step (1) and stirring for 4-7 minutes; (3) adding the composite foaming agent into slurry in the step (2) and stirring for 3-5 minutes; and (4) casting into a mould, standing in a half hour and disassembling the mould, and maintaining for 200 hours at 15-19 DEG C to obtain the aerated concrete.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to aerated concrete with industrial waste residue added and a preparation method thereof. Background technique [0002] Air-entrained concrete is a new lightweight wall material actively advocated by the state. At present, the commonly used types of aerated concrete in the market are mainly fly ash aerated concrete, cement and sand aerated concrete; It has been popularized and used for more than ten years. In many developed areas in the central and eastern regions, the limited fly ash of power plants has already become a hot building material raw material, and the strong demand has led to the ex-factory price of fly ash rising. The latter has a higher cost and a larger proportion of the blocks made, which is not conducive to the use of high-rise buildings. [0003] Chinese invention patent application 201010140498.3 discloses a high-performance foamed concrete and its preparation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/04C04B18/30
CPCY02W30/91
Inventor 苗春姚伟张峙琪张雄乔生艮
Owner TONGJI UNIV