The composition of papermaking sludge is complex and generally has high pollution.In order to realize recycling and resource utilization of papermaking sludge,a kind of aerated concrete for tunnel engineering was prepared with white mud as the substitute material for lime.The basic properties of aerated concrete with different replacement rate of white mud,such as water absorption,three-dimensional compressive strength,axial compressive strength and splitting tensile strength,were tested and analyzed.The results show that the mixed ratio of cement,lime,gypsum and fly ash is 10:20:3:67,the replacement rate of white mud to lime is 20%,and the calcination temperature of white mud is 1200℃,the comprehensive performance of the aerated concrete is the best,which can meet the needs of tunnel construction.
关键词
造纸污泥/造纸白泥/隧道工程/加气混凝土/性能分析
Key words
paper sludge/paper making white mud/tunnel engineering/aerated concrete/performance analysis
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