Research progress on efficient utilization of solid waste in concrete and disaster prevention of engineering structures
China grapples with a substantial stockpile of industrial solid waste and construction demolition waste,with the annual production of solid waste showing an upward trend.The storage of the waste poses significant challenges to sustainable development,leading to issues like landslides,environmental disasters,and extensive land occupation.Major earthquakes exacerbate the problem,causing building collapses and generating a substantial amount of construction solid waste.Both domestic and international scholars are observing how to effectively utilize this construction solid waste in post-disaster reconstruction.The current focal point is on leveraging these solid wastes to produce concrete,presenting a valuable and promising solution.The term"solid waste concrete"encompasses concrete prepared from industrial solid waste,construction solid waste,and a combination of industrial and construction solid waste.Additionally,concrete derived from the latter two sources is specifically termed recycled concrete.The efficient utilization of solid waste in concrete holds three key implications:enhancing the properties of solid waste cementitious materials and aggregates,creating concrete with a high solid waste content,and judiciously applying solid waste concrete in engineering structures based on stress requirements.This article delivers a comprehensive review of the physicochemical characteristics of various construction and industrial solid wastes.It delves into the impact of different solid waste materials on the mechanical and durability properties of concrete.Furthermore,building on the synthesis of research outcomes related to the seismic performance and fire resistance of solid waste concrete components and structures,the article anticipates the future development of research on disaster-resistant technologies for structures constructed with solid waste concrete.
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