采用城市生活垃圾焚烧飞灰制备绿色水泥砂浆的可行性研究

doi:10.11896/cldb.23070076

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Abstract Municipal solid waste incineration fly ash (MSWIFA) is one of the by-products of municipal solid waste incineration, and its improper disposal can lead to serious environmental problems. Using MSWIFA to partly replace cement to produce green mortar (GM) can realize the resource utilization of MSWIFA in building materials. This work mainly carried out an investigation on the effects of MSWIFA with different substitution rates on the workability, mechanical properties and durability of GM. Furthermore, the micro pore structure and morphology of GM were also explored. Finally, by analyzing the energy consumption, carbon emission and production cost of 1 m³ GM, the economic, social and ecological benefits of GM produced by replacing cement with MSWIFA were evaluated. It was shown that: (i) due to the incorporation of MSWIFA, the flexural strength and compressive strength of GM were reduced by 10.54%—29.97% and 18.74%—39.54%, respectively; (ii) the heavy metal leaching results of GM could meet the limit value of national standard, which suggested that Portland cement could solidify MSWIFA; (iii) when the substitution rate of MSWIFA was 15%, the energy consumption, carbon emission and production cost of 1 m³GM could be reduced by 14.90%, 14.63% and 10.36%, but its workability, mechanical properties, and durability could still meet the requirements of building mortar. These results indicated that using MSWIFA to produce GM could realize resource utilization of this solid waste, which enjoy great benefits in economic, social and ecologic terms.

Key words： municipal solid waste incineration fly ash cement mortar mechanical property durability heavy metal leaching

Published: 10 October 2024 Online: 2024-10-23

CLC number:

TU525

Fund:National Natural Science Foundation of China (52278262), and the National Science Found for Distinguished Young Scholars (51925903).

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	CHU Hongyan
	SHI Wenfang
	WANG Qun
	JIANG Jinyang

Cite this article:

CHU Hongyan,SHI Wenfang,WANG Qun, et al. Feasibility of Preparing Green Cement Mortar via Municipal Solid Waste Incineration Fly Ash[J]. Materials Reports, 2024, 38(19): 23070076-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23070076 OR http://www.mater-rep.com/EN/Y2024/V38/I19/23070076

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