Abstract
This study aims to investigate the feasibility of partially substituting municipal solid waste incineration fly ash (MSWI FA) in the field of construction engineering for ordinary Portland cement, in response to the resource scarcity and environmental issues associated with conventional silicate cement. It is found that MSWI FA has high potential in replacing cement, through the analysis of macro-properties, electron microscopy, Structural, and leaching characteristics of heavy metals. The compressive strengths of 3 days and 28 days are 7.15 MPa and 21.83 MPa, respectively, meeting the requirements for various construction applications including backfilling in mining voids, highway subgrades, backfilling behind shield tunnel walls, and grouting reinforcement in soft soil layers. Furthermore, the common leaching concentrations of heavy metals are significantly lower than the landfill standards, suggesting that environmental concerns may no longer be a deterrent to the utilization of MSWI FA. In terms of its comprehensive performance, it can have broad development space in the field of construction in the future.
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