摘要
随着城市生活垃圾焚烧量不断增加,炉渣产生量也随之增多,其资源化利用成为研究热点。系统综述了生活垃圾焚烧炉渣在混凝土中资源化利用的研究进展,炉渣富含Si、Ca、Al等元素,具备作为胶凝材料及骨料的潜力,但其重金属含量、多孔结构及高吸水性可能影响混凝土性能。研究表明:机械处理、水洗、热处理及碳酸化等多种预处理方法可有效改善炉渣的理化特性。作为胶凝材料时,炉渣火山灰活性可提升混凝土密实度,但掺量需控制在40%以下;作为混凝土的粗骨料或细骨料时,其替代率与混凝土强度呈负相关,需通过优化预处理和掺量以平衡性能与环境风险。未来研究应聚焦复合掺合料开发及长期耐久性评估,以推动炉渣在混凝土中的高效安全应用。
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.
作者
方凯乐
周强
汪军
冯至
吴珣
FANG Kaile;ZHOU Qiang;WANG Jun;FENG Zhi;WU Xun(Anhui Tongyuan Environment Energy Saving Co.Ltd.,Hefei Anhui 230071;School of Civil Engineering and Transportation,Hohai University,Nanjing Jiangsu 210024)
出处
《环境卫生工程》
2025年第4期38-45,共8页
Environmental Sanitation Engineering
基金
国家重点研发计划项目(2023YFC3707905)
中央高校基本科研业务费专项资金(B240201024)。
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
municipal solid waste incineration bottom ash
concrete
resource utilization
pretreatment
physical and chemical properties
