碱激发生活垃圾焚烧炉渣底灰泡沫混凝土制备及性能研究

doi:10.11896/cldb.23100256

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Abstract Foam concrete is widely used in the construction industry due to its low weight, good sound insulation, heat insulation, and seismic perfor-mance. Traditional foam concrete uses cement as the binder, which results in high carbon emissions. To reduce carbon emissions, municipal solid waste incineration bottom ash (MIBA) is partially used to replace cement to prepare MIBA foam concrete (MIBAFC). Based on the optimal foaming agent, alkali-activated technology is further used to improve the performance of foam concrete. The effects of different types of activators on the mechanical properties, water absorption rate, and drying shrinkage of MIBAFC were studied, and the microstructure and hydration characteristics of alkali-activated MIBAFC were tested using BSE, SEM, TG-DTG, and XRD. The results show that CaO+Na₂CO₃ (CN), NaOH (NH), water glass+K₂CO₃ (SK), and water glass (NS) can all undergo polymerization reaction with the active components such as SiO₂ and Al₂O₃ in MIBA, which improves the degree of hydration reaction and the pore structure of the hardened slurry. This significantly improves the setting time, water absorption rate, mechanical properties, and drying shrinkage of MIBAFC. Among the four activators, NS has the best overall modification effect, while CN has no significant effect.

Key words： foam concrete municipal solid waste incineration bottom ash (MIBA) alkali activation setting time strength drying shrinkage pore structure

Published: 25 November 2024 Online: 2024-11-22

CLC number:

TU52

Fund:National Natural Science Foundation of China (52178121).

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	Articles by authors
	ZHANG Cuirong
	ZHANG Hongru
	JIANG Junjie
	YI Shifan

Cite this article:

ZHANG Cuirong,ZHANG Hongru,JIANG Junjie, et al. Investigation on Preparation and Performance of Alkali-activated Municipal Waste Incineration Bottom Ash (MIBA) Foam Concrete[J]. Materials Reports, 2024, 38(22): 23100256-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23100256 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23100256

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