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Method for activating waste aerated concrete blocks

A technology of aerated concrete and blocks, which is applied in the direction of cement production, etc., can solve the problems of large economic losses, restrict the healthy development of aerated concrete blocks, and affect the normal production of enterprises, so as to increase profits, solve waste piles, and facilitate hydrolysis Effects on Ability and Responsiveness

Inactive Publication Date: 2012-12-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The huge economic loss of the enterprise has seriously affected the normal production of the enterprise. If it is not resolved as soon as possible, it will restrict the healthy development of the aerated concrete block industry

Method used

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  • Method for activating waste aerated concrete blocks
  • Method for activating waste aerated concrete blocks
  • Method for activating waste aerated concrete blocks

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: A kind of method for the activation of waste aerated concrete blocks of the present invention comprises the following steps:

[0026] (1) Break the discarded aerated concrete blocks into aerated concrete fragments, the size of which is 1cm to 10cm;

[0027] (2) Calcining the aerated concrete fragments, the heating rate is controlled at 10°C / min to 30°C / min, calcining at 600°C for 1.5 hours, and then cooling down to room temperature by air cooling or natural cooling;

[0028] (3) Put the above-mentioned aerated concrete fragments into a ball mill for ball milling, and the fineness is controlled at 180 mesh sieve ≤ 8%.

[0029] According to "GB / T 12957-2005 Test Method for Industrial Waste Residue Activity of Cement Admixtures", the test materials and requirements for the activity of industrial waste residues used in cement admixtures, as well as their potential hydraulic properties, pozzolanic activity and 28-day compression resistance of cement The streng...

Embodiment 2

[0032] Embodiment 2: A kind of method for the activation of waste aerated concrete block of the present invention comprises the following steps:

[0033] (1) Break the discarded aerated concrete blocks into aerated concrete fragments, the size of which is 1cm to 10cm;

[0034] (2) Calcining the aerated concrete fragments, the heating rate is controlled at 10°C / min to 30°C / min, calcining at 700°C for 1 hour, and then cooling down to room temperature by air cooling or natural cooling;

[0035] (3) Put the above-mentioned aerated concrete fragments into a ball mill for ball milling, and the fineness is controlled at 180 mesh sieve ≤ 8%.

[0036] According to "GB / T 12957-2005 Test Method for Industrial Waste Residue Activity of Cement Admixtures", the test materials and requirements for the activity of industrial waste residues used in cement admixtures, as well as their potential hydraulic properties, pozzolanic activity and 28-day compression resistance of cement The strength r...

Embodiment 3

[0039] Embodiment 3: A kind of method for the activation of waste aerated concrete block of the present invention comprises the following steps:

[0040] (1) Break the discarded aerated concrete blocks into aerated concrete fragments, the size of which is 1cm to 10cm;

[0041] (2) Calcining the aerated concrete fragments, the heating rate is controlled at 10°C / min to 30°C / min, calcining at 825°C for 45 minutes, and then cooling down to room temperature by air cooling or natural cooling;

[0042] (3) Put the above-mentioned aerated concrete fragments into a ball mill for ball milling, and the fineness is controlled at 180 mesh sieve ≤ 8%.

[0043] According to "GB / T 12957-2005 Test Method for Industrial Waste Residue Activity of Cement Admixtures", the test materials and requirements for the activity of industrial waste residues used in cement admixtures, as well as their potential hydraulic properties, pozzolanic activity and 28-day compression resistance of cement The streng...

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Abstract

The invention discloses a method for activating waste aerated concrete blocks. The method comprises the following steps of: firstly, breaking the waste aerated concrete blocks to form aerated concrete fragments; burning the aerated concrete fragments, and cooling to normal temperature; and finally arranging the aerated concrete fragments subjected to the treatments in a ball mill and carrying out ball-milling treatment. Main hydrate tobermorite stone calcium silicate hydrate in the activated waste aerated concrete blocks is in an amorphous state and has excellent hydrolyzing property and reacting property. The activated waste aerated concrete is subjected to activity check according to provisions in a 'GB / T 12957-2005 activity experimental method for cement mixing material industrial waste residues', the data show that the activated waste aerated concrete has the activity like a pozzolanic material, the 28-day compression strength can reach about 90% of the standard cement gel sand test block. With the adoption of the method, recycling the waste aerated concrete blocks is realized and the application prospect of the waste aerated concrete blocks is expanded.

Description

1. Technical field [0001] The invention relates to the field of resource utilization of inorganic solid waste, in particular to a method for activating waste aerated concrete blocks. 2. Background technology [0002] Air-entrained concrete blocks have light weight and good thermal insulation performance. They can be used as wall materials for energy-saving buildings, and have become the leading product in the new building wall market in various places. However, its strength is not high, causing a large number of blocks to be damaged during the production process. Generally, the damage rate of aerated concrete block enterprises in the production process reaches 5% to 8%. It can reach about 10%, and some enterprises even reach 15%. The reuse of discarded aerated concrete blocks is an urgent problem to be solved in the majority of aerated concrete block factories. [0003] According to the data, the annual output of aerated concrete blocks in Jiangsu Province alone has reached...

Claims

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Application Information

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IPC IPC(8): C04B7/24
CPCY02P40/10
Inventor 崔崇杨秀丽崔晓昱马海龙江金国贾建平朱志萍
Owner NANJING UNIV OF SCI & TECH
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