Foamed concrete containing fly ash: Properties and application to backfilling

被引：58
作者：
Chen, Yong-gui [1 ]
Guan, Lei-lei [1 ]
Zhu, Shen-yi [1 ]
Chen, Wei-jia [2 ]
机构：
[1] Tongii Univ, Dept Geotech Engn, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai 200092, Peoples R China
[2] Xuhui Dist Municipal Construct & Management Commi, Shanghai 200030, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 273卷
关键词：
Foamed concrete; Fly ash; Sulfate attack; Backfilling; Urban abandoned underground space; Backfilling environmental effects;
D O I：
10.1016/j.conbuildmat.2020.121685
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
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. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：15
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