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A platform for research: civil engineering, architecture and urbanism
Foamed concrete containing fly ash: Properties and application to backfilling
Highlights Abandoned underground structures in cities must be backfilled. Foamed concrete (FC) is a useful material for this. We studied FC in which the cement was partly replaced by fly-ash waste. This kind of FC is light and has excellent mechanical and chemical properties. Using it as a backfill has negligible effects on surrounding structures.
Abstract The use of foamed concrete (FC) with cement partially replaced by fly ash (FA) for urban abandoned underground-space backfilling was examined. The influence of density, water-binder ratio, and FA content on the mechanical and chemical properties of FC and on the surrounding environment was investigated in the laboratory and in the field. FC immersed in sulfate solution exhibited increased mass and compressive strength, as well as high resistance to sulfate attack. The maximum stress generated by FC on the original structure was 75.68 kPa; settlement variation was negligible. FC is thus a promising material that minimizes environmental effects of backfilling.
Foamed concrete containing fly ash: Properties and application to backfilling
Highlights Abandoned underground structures in cities must be backfilled. Foamed concrete (FC) is a useful material for this. We studied FC in which the cement was partly replaced by fly-ash waste. This kind of FC is light and has excellent mechanical and chemical properties. Using it as a backfill has negligible effects on surrounding structures.
Abstract The use of foamed concrete (FC) with cement partially replaced by fly ash (FA) for urban abandoned underground-space backfilling was examined. The influence of density, water-binder ratio, and FA content on the mechanical and chemical properties of FC and on the surrounding environment was investigated in the laboratory and in the field. FC immersed in sulfate solution exhibited increased mass and compressive strength, as well as high resistance to sulfate attack. The maximum stress generated by FC on the original structure was 75.68 kPa; settlement variation was negligible. FC is thus a promising material that minimizes environmental effects of backfilling.
Foamed concrete containing fly ash: Properties and application to backfilling
Chen, Yong-gui (author) / Guan, Lei-lei (author) / Zhu, Shen-yi (author) / Chen, Wei-jia (author)
2020-11-11
Article (Journal)
Electronic Resource
English
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