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Strengthening agent for construction material prepared by carbonizing curing waste

A technology for building materials and carbonization curing, applied in the field of building materials, can solve the problems of shortening production cycle, low strength of carbonized curing building materials, etc.

Inactive Publication Date: 2009-02-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The core content of the present invention is to overcome the problem of low strength of carbonized and maintained building materials, and provide a kind of reinforcing agent for preparing building materials from carbonized and cured waste. This technology utilizes slaked lime, quicklime, and silicic acid The composition of salt cement or waste cement (hydrated Portland cement) plays a role of carbonization enhancement in carbonized materials, while increasing the carbonization rate and reducing CO 2 Greenhouse gas emissions, prepared carbonized maintenance building material products with good performance, and shortened the production cycle

Method used

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  • Strengthening agent for construction material prepared by carbonizing curing waste
  • Strengthening agent for construction material prepared by carbonizing curing waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The steel slag discharged by Jinan Iron and Steel Group is selected as the carbonized material, and its chemical composition is:

[0020]

[0021] Mix the above carbonized materials and water evenly, press them into standard blocks, and use industrial CO 2 gas for conservation, CO 2 The concentration is 20% by weight, and the carbonization curing temperature is 100°C. After two hours of curing, finished bricks are made. After carbonization curing, the weight increase of steel slag bricks absorbs CO 2 About 12%, its strength is about 15MPa.

[0022] Also mix the above steel slag carbonization raw material with slaked lime enhancer and water, adopt the same preparation process, the weight increase of steel slag bricks will absorb CO 2 14%, and its strength is about 20MPa.

[0023] The added amount of the slaked lime reinforcing agent accounts for 5% by weight of the carbonized steel slag raw material, and the content of calcium hydroxide in the slaked lime reinf...

Embodiment 2

[0025] Select the steel slag discharged by Jinan Iron and Steel Group as the carbonized material (same as embodiment 1).

[0026] Mix the above raw materials and water evenly, press them into standard blocks, and use industrial CO 2 gas for conservation, CO 2 The concentration is 20% by weight, and the carbonization curing temperature is 80°C. After two hours of curing, finished bricks are made. After carbonization curing, the weight of carbonized bricks increases to absorb CO 2 8%, and its strength is about 10MPa.

[0027] Also mix the above steel slag carbonization raw materials with waste cement reinforcing agent and water evenly, and adopt the same preparation process, the weight increase of steel slag bricks will absorb CO 2 About 12%, its strength is about 16MPa.

[0028] The added amount of the waste cement reinforcing agent accounts for 10% by weight of the steel slag carbonization raw material, and the content of calcium oxide in the waste cement reinforcing ag...

Embodiment 3

[0030] Select waste cement as carbonized material, its chemical composition and its weight percentage are:

[0031]

[0032] Mix the above raw materials with air-entraining agent and water evenly, press them into air-entrained concrete blocks, and use CO 2 45% wt industrial waste gas is used for curing, the curing gas pressure is 5bar, and the carbonization curing temperature is 150°C. After 3 hours of curing, carbonized aerated concrete blocks are made.

[0033] After carbonation curing, the weight increase of aerated concrete block absorbs CO 2 15%, and its strength is about 4MPa.

[0034] Also mix the above waste cement carbonization raw materials with quicklime enhancer, air-entraining agent and water evenly, and adopt the same preparation process, the weight increase of carbonized air-entrained concrete blocks will absorb CO 2 17%, and its strength is about 5MPa.

[0035] The added amount of the quicklime reinforcing agent accounts for 8% by weight of the waste c...

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Abstract

The invention belongs to the technical field of building materials and relates to an enhancer for the building materials which are prepared by taking wastes (including different types of steel slag, furnace slag, smelting slag, sludge, red sludge, incineration ash and waste cement, and the like) as main materials for absorbing CO2 waste gas, in particular to the enhancer for the building materials which are prepared by the carbonation curing wastes and using steel slag and cement as the main materials for absorbing the CO2 gas. The enhancer contains more than 50 percent by weight of easily carbonized ingredients, and the easily carbonized ingredients are one or more of calcium hydroxide, calcium oxide, portland cement or waste concrete. The enhancer of the invention plays the roles in strengthening and improving the carbonation rate, improves the strength of the building materials which are prepared by carbonation and curing and the CO2 absorption rate and shortens the production cycle.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to the absorption of CO by wastes (including different types of steel slag, slag, smelting slag, sludge, red mud, incineration ash, waste cement, etc.) 2 Reinforcing agent for the preparation of building materials from waste gas. Especially involving the absorption of CO by steel slag and cement as the main materials 2 Gas-produced carbonization of curing waste for the preparation of reinforcing agents for building materials. Background technique [0002] The background technology involved in the present invention is the carbonization of maintenance waste to prepare building materials, involving the comprehensive utilization of waste residue and CO 2 emission reduction technology. In 2007, my country's steel slag discharge reached about 70 million tons. The comprehensive utilization rate of steel slag, slag and other smelting slag and chemical waste slag is very low, onl...

Claims

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Application Information

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IPC IPC(8): C04B22/06
Inventor 常钧叶正茂黄世峰张林菊吴昊泽丁亮刘梅
Owner UNIV OF JINAN
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