Excitant for preparing construction material by carbonized curing wastes

A technology of building materials and carbonization maintenance, applied in the field of building materials, can solve problems such as low carbonization rate, increase carbonization rate, and shorten production cycle, and achieve the effect of increasing carbonization rate, promoting carbonization, and shortening production cycle

A technology of building materials and carbonization maintenance, applied in the field of building materials, can solve problems such as low carbonization rate, increase carbonization rate, and shorten production cycle, and achieve the effect of increasing carbonization rate, promoting carbonization, and shortening production cycle

CN101337786AInactive Publication Date: 2009-01-07UNIV OF JINAN
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  • Excitant for preparing construction material by carbonized curing wastes
  • Excitant for preparing construction material by carbonized curing wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The steel slag discharged by Jinan Iron and Steel Group is selected as the carbonized material, and its chemical composition is:

[0019]

[0020] 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.

[0021] Also mix the above-mentioned steel slag carbonization raw materials with activator and water, and adopt the same preparation process, the weight of steel slag bricks increases to absorb CO 2 About 15%, its strength is about 18MPa.

[0022] The addition of the activator accounts for wt5% of the steel slag carbide material, and the activator contains wt80% NaHCO 3 .

Embodiment 2

[0024] Select the steel slag discharged by Jinan Iron and Steel Group as raw material (same as embodiment 1).

[0025] 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.

[0026] Also mix the above-mentioned steel slag carbonization raw materials with activator and water evenly, and adopt the same preparation process, the weight increase of steel slag bricks will absorb CO 2 13.5%, and its strength is about 17MPa.

[0027] The addition of described activator accounts for the wt10% of steel slag carbonization raw material, contains the gypsum of wt50% and the Ca(HCO of wt40% in the activator 3 ) 2 .

Embodiment 3

[0029] Select waste cement as carbonized material, its chemical composition and its weight percentage are:

[0030]

[0031] Mix the above raw materials with air-entraining agent and water evenly, press them into air-entrained concrete blocks, and use CO 2 The industrial waste gas with a weight of 45% is used for curing, the curing gas pressure is 5 bar, and the carbonization curing temperature is 150°C. After 3 hours of curing, carbonized aerated concrete blocks are made.

[0032] After carbonation curing, the weight increase of aerated concrete block absorbs CO 2 15%, and its strength is about 4MPa.

[0033] Also mix the above-mentioned waste cement carbonization raw materials with activator, air-entraining agent and water evenly, and adopt the same preparation process, the weight increase of carbonized air-entraining concrete block will absorb CO 2 19%, and its strength is about 6.5MPa.

[0034] The activator is water glass (Na 2 SiO 3 ), its solid content is wt 30...

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Abstract

The invention belongs to the technical field of a constructional material, and relates to an excitant used for carbonizing and curing offal prepared constructional materials. The excitant comprises not less than 50 percent of excitable components by weight which are one or more than one of NaHCO3, soluble glass, plaster, Ca(HCO3)2, NaCl and Na2CO3. The excitant has the advantages that when offal prepared constructional materials are carbonized and cured, the excitant can promote carbonization in carbonization materials through the excitable components by adding the excitant of proper amount, thus increasing the carbonization ratio and reducing the discharged carbon dioxide as a greenhouse gas to great extent, preparing products for carbonizing and curing constructional materials having good performance, and reducing the production cycle with good economic benefit.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to an activator for preparing building materials from carbonized curing waste. By adding an activator to the carbonization curing material, the carbonization absorption rate and the strength of the carbonized building material can be improved, and a carbonized building material with good performance can be prepared. technical background [0002] It is well known that due to atmospheric CO 2 Concentration increases, leading to a significant rise in temperature. At present, the concentration of carbon dioxide in the earth's atmosphere has increased from 280ppm before the industrial revolution (1750) to nearly 360ppm. If atmospheric CO 2 Concentrations exceeding about 550ppm will significantly increase the harm to human society and the environment. [0003] At the same time, my country discharges hundreds of millions of tons of steel slag, slag and other smelting slag and ...

Claims

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Application Information

Patent Timeline
07 Jan 2009
Publication
CN101337786A
IPC
C04B22/12; C04B22/10; C04B20/00
CPC
C04B18/04; C04B40/0039; C04B28/02; Y02W30/91
Inventors
常钧; 黄世峰