关键词: 生活垃圾焚烧炉渣, 混凝土, 资源化利用, 预处理, 理化性质

Abstract: With the incessant rise in the volume of municipal solid waste incineration, the generation of incineration slag has witnessed a dramatic surge. Therefore, its resource utilization has become a research hotspot. The recent advancements in the utilization of incineration bottom ash in concrete applications was systematically reviewed. Endowed with rich content of silicon, calcium and aluminum, incineration bottom ash demonstrates considerable potential as both a cementitious material and an aggregate. Nevertheless, its heavy metal content, porous structure, and elevated water absorption rates may potentially compromise the performance of concrete. A variety of pretreatment methods, such as mechanical processing, water washing, thermal treatment, and carbonation have been demonstrated that can effectively enhance the physicochemical attributes of incineration bottom ash. When employed as a cementitious material, the pozzolanic activity of incineration bottom ash can significantly improve the compactness of concrete, but the dosage of incineration bottom ash should be strictly limited to less than 40%. When used as coarse or fine aggregate for concrete, the substitution rate of incineration bottom ash manifested an inverse correlation with the strength of the resulting concrete. Therefore, it is necessary to optimize the pretreatment and dosage to balance performance and environmental risks. Looking ahead, future research endeavors should prioritize the development of composite admixtures and assessments of long-term durability, in order to promote the efficient and safe application of bottom slag in concrete.

Key words: municipal solid waste incineration bottom ash, concrete, resource