Research and Application of Composite Roadbed Filling Material Based on Incineration Slag of Municipal Solid Waste
[Purposes]In order to alleviate the problem of insufficient filling materials in road construc-tion,this article took incineration slag of municipal solid waste as the research object,and prepared com-posite roadbed filling materials with slag and soil for the filling of various grades of highway roadbeds.[Methods]Based on the construction situation,a composite filler mix ratio was designed.By studying the compaction characteristics and road performance such as CBR value of the composite filler and its ce-ment improvement,the leaching heavy metal content of slag and the environmental protection properties of the composite filler were detected,and an engineering test section was carried out for application.[Findings]The results showed that compared to its single component,the CBR value of the composite roadbed filler increased by 2～5 times,and the composite ratio of the two was determined to be 1∶1(vol-ume ratio);the leaching of heavy metals from slag meets the requirements of relevant national regula-tions,and the slag was beneficial for plant growth;the composite subgrade had good compaction perfor-mance,and all indicators met the design and acceptance requirements.[Conclusions]The use of the slag as a composite roadbed filling component was environmentally friendly,safe,pollution-free,and had promotion and application value.
incineration slag of municipal solid wastecomposite roadbed filling materialroad perfor-manceresource utilization
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