电石渣对CO<sub>2</sub>拌和水泥浆性能及固碳效能的影响

doi:10.11896/cldb.23090082

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Abstract In order to improve the carbon sequestration efficiency of cement-based materials directly mixed with CO₂, the effects of carbide slag and CO₂ on the fluidity, setting time, compressive strength, carbon sequestration amount and carbon sequestration efficiency of cement paste is studied by adding carbide slag into fresh cement slurry as an enhanced carbon sequestration material. The results show that the addition of carbide slag can reduce the fluidity of the cement slurry, and accelerate the setting time of the slurry, and also reduce the strength of the cement mortar specimen in different curing ages. When CO₂ is injected into the slurry, the fluidity of the slurry is further reduced but the setting time of the slurry is delayed and the compressive strength of cement is improved. When carbide slag is mixed with CO₂, the carbon sequestration amount and carbon sequestration efficiency of cement paste can be improved. When the carbide slag content is 15% to cement, the carbon sequestration amount is the highest, which reaches 6.95%. When the carbide slag content is 10% to cement, the carbon sequestration efficiency is the hig-hest, which can reach 13.03%. The purpose of this work is to provide reference for the establishment of a new approach for the preparation of low-carbon cement-based materials and the collaborative utilization of carbide slag resources.

Key words： carbide slag fresh cement slurry mixed with CO₂ compressive strength carbon sequestration efficiency

Published: 10 December 2024 Online: 2024-12-10

CLC number:

X70

Fund:Opening Project of State Key Laboratory of Green Building Materials (2022GBM08), Natural Science Foundation of Sichuan (2023NSFSC0931), Sichuan Province Key Research and Development Project (2023YFS0360), National Natural Science Foundation of China (52178254), Natural Science Foundation of Southwest University of Science and Technology (22zx7131).

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	Articles by authors
	MIN Qianshen
	GU Tao
	HE Bo
	WEI Renjie
	LIU Chuanbei
	ZHANG Lihua
	LIU Laibao

Cite this article:

MIN Qianshen,GU Tao,HE Bo, et al. Effect of Carbide Slag Addition on Properties and Carbon Sequestration Efficiency of Fresh Cement Slurry Mixed with CO₂[J]. Materials Reports, 2024, 38(23): 23090082-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23090082 OR http://www.mater-rep.com/EN/Y2024/V38/I23/23090082

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