Method for preparing high-fixed-carbon-content construction material product

A technology for building materials and carbon content, applied in the field of building materials, can solve the problems of low carbon sequestration, low strength, and large emissions in maintenance, and achieve the effects of excellent performance, increased strength, and reduced CO2 emissions.

Active Publication Date: 2016-07-27
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the conventional way to produce building material products CO 2 A series of problems such as large emissions, low strength and low strength of products after pure carbonization and stirring, and low carbon fixation amount in simple carbonization curing are a kind of improvement of CO by means of the production process of building material products. 2 good way to take advantage

Method used

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  • Method for preparing high-fixed-carbon-content construction material product
  • Method for preparing high-fixed-carbon-content construction material product
  • Method for preparing high-fixed-carbon-content construction material product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Select PO 42.5 cement, add water according to the water-cement ratio of 0.15, fully stir in a closed container in a carbon dioxide atmosphere for 1-1.5 minutes, press and shape it into a 40mm×40mm×20mm blank with a pressure of 8MPa, and standardize the obtained blank for 2 Hours, that's it. The carbon dioxide atmosphere is containing CO 2 industrial waste gas or high-purity CO 2 .

Embodiment 2

[0040] Select PO 42.5 cement, add water according to the water-cement ratio of 0.15, and adopt four methods of production, namely: (1) carbonization curing after carbonization stirring, (2) standard curing after carbonization stirring, (3) carbonization curing after conventional stirring , (4) Standard maintenance after conventional stirring. The pressure used for molding is 8MPa, the product size is 40mm×40mm×20mm, and the curing period is 2h.

[0041] The specific operation is as follows:

[0042] (1) Select PO 42.5 cement, add water according to the water-cement ratio of 0.15, fully stir in a closed container in a carbon dioxide atmosphere for 1-1.5 minutes, press and form a blank of 40mm×40mm×20mm with a pressure of 8MPa, and convert the previous step The obtained blank is carbonized and cured for 2 hours under the conditions of a carbon dioxide atmosphere, a curing pressure of 1 bar, and a temperature not lower than 5°C.

[0043] (2) Select PO 42.5 cement, add water acc...

Embodiment 3

[0049] Select P·O42.5 cement, respectively adopt (1) hydration and carbonization stirring for several times and (2) one-time carbonization stirring for stirring, press and form a 40mm×40mm×20mm specimen with a pressure of 8MPa, and carbonize and cure for 2 hours .

[0050] The specific operation is as follows:

[0051] (1) Select PO 42.5 cement, add water according to the water-cement ratio of 0.1, fully stir in a closed container in a carbon dioxide atmosphere for 1-1.5 minutes to obtain a carbonized and stirred mixture; mix the carbonized and stirred mixture obtained in the previous step The ratio of water-cement ratio is 0.15-0.2 for secondary water replenishment, and the mixture is stirred in the air for 1 minute to obtain the mixture stirred for the second time; the weight of ash in the water-cement ratio is the same as that of the gelling material calculate. Use 8MPa pressure to press and form a blank of 40mm×40mm×20mm, and carbonize and cure the blank obtained in the ...

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Abstract

The invention provides a method for preparing a high-fixed-carbon-content construction material product. The method comprises the following steps of: mixing a cementing material which is prepared from dicalcium silicate, tricalcium silicate, calcium hydroxide and other ingredients with water in a certain water-cement ratio; mixing and stirring in a CO2 atmosphere in a certain procedure to absorb a certain amount of CO2 to prepare a construction product blank; and then, performing carbonated curing to absorb CO2 once again to produce the construction material product. According to the method, CO2 is absorbed in the whole process of producing a construction product, so that CO2 can be effectively utilized, the fixed carbon content is improved by 70 percent in comparison with that of single carbonized curing, the traditional mode which has high CO2 emission in construction material product production is broken through, and the product performance can be improved. The method has remarkable effects in relieving the weather problem caused by CO2 emission, shortening production cycle of construction material products and improving production efficiency.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a method for preparing building material products with high carbon fixation. Background technique [0002] The climate problem caused by carbon emissions is becoming more and more serious. Carbon emissions in the field of building materials are of particular concern. It is estimated that the carbon emissions of the cement industry alone account for 5% of the global total. It is imperative to use green and low-carbon technology to produce building materials to reduce carbon emissions and alleviate climate problems. The Intergovernmental Panel on Climate Change (IPCC) believes that carbon capture and storage (CCS) technology is one of the important means to control carbon emissions and mitigate climate change. CO 2 The storage methods mainly include: geological storage, marine storage, mineral storage or industrial utilization. Among them, mineral storage is the most s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/18C04B40/02
CPCC04B28/188C04B40/0231
Inventor 何真李振梁辰蔡新华
Owner WUHAN UNIV
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