粉煤灰地聚物混凝土性能与环境影响的综合评价

doi:10.11896/cldb.21060162

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Abstract Most of the existing environmental impact assessments of fly ash geopolymer concrete only consider the unilateral factors of environmental benefits, while mechanical properties and durability are important evaluation indicators for materials in engineering applications. Material selection needs to consider its mechanical properties, durability and environmental impact at the same time. In this work, the life cycle evaluation (LCA) method was adopted, and the compressive strength, sulfate resistance and environmental impact were selected as evaluation indicators, and design 9 groups mix of fly ash geopolymer concrete were designed for quantitative analysis of environmental impact and resistance to sulfate erosion. The comprehensive evaluation model is established by grey clustering evaluation method. The results show that: (Ⅰ) the environmental impact of fly ash geopolymer concrete mainly comes from the raw material production stage, accounting for up to 73%. (Ⅱ) The environmental benefits of fly ash geopolymer concrete decrease with the increase of alkali activator dosage, fly ash dosage and the ratio of sodium silicate to sodium hydroxide, and the amount of alkali activator used has the greatest impact on environmental benefits;the larger the compressive corrosion resistance coefficient, the better the sulfate corrosion resistance. (Ⅲ) In the experiment, mix 1 has the best environmental benefit, mix 5 has the best sulfate resistance performance, mix 3 has the best overall performance.

Key words： fly ash geopolymer concrete life cycle assessment (LCA) compressive strength sulfate resistance comprehensive performance evaluation

Published: 25 January 2023 Online: 2023-02-08

CLC number:

TU502

Fund:Science and Technology Department of Sichuan Province (2020YJ0319).

Corresponding Authors: shixs@scu.edu.cn

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	Articles by authors
	LIANG Yongchen
	SHI Xiaoshuang
	ZHANG Cong
	ZHANG Tao
	WANG Xiaoqi

Cite this article:

LIANG Yongchen,SHI Xiaoshuang,ZHANG Cong, et al. Comprehensive Evaluation of the Performance and Environmental Impact of Fly Ash Geopolymer Concrete[J]. Materials Reports, 2023, 37(2): 21060162-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.21060162 OR http://www.mater-rep.com/EN/Y2023/V37/I2/21060162

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