【摘 要】
：
In the Yellow River Basin,the source of flood-prevention tone is scarce.The purpose of this study is to investigate the feasibility of producing a kind of artificial flood-prevention stone by using Ye
【机 构】
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School of Civil Engineering, Dalian University of Technology,Dalian 116024, RP China
【出 处】
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中国大坝工程学会水库泥沙处理与资源利用技术专业委员会成立大会
论文部分内容阅读
In the Yellow River Basin,the source of flood-prevention tone is scarce.The purpose of this study is to investigate the feasibility of producing a kind of artificial flood-prevention stone by using Yellow River silt via alkali-activated method.The effects of alkali dosage,slag content and curing age on the compressive strength of artificial flood-prevention stone were studied.The results showed that the specimen made from optimal mix proportion can meet the requirement of flood-prevention stone.The main product in alkali-activated process is C-S-H gel confirmed by microcosmic tests such as SEM/EDS,TG/DTG and so on.CaCO3 is generated by the carbonation of partial C-S-H gel and residual Ca(OH)2.C-S-H gel and CaCO3 have common contribution to strength.In addition,frost resistance of the artificial flood-prevention stone at the age of 90 days was evaluated by freeze-thaw cycle method.The porosity and pore size distribution were tested by Mercury intrusion porosimetry (MIP) to explicate the change before and after freeze-thaw cycle.As a whole,it is feasible to produce artificial flood-prevention stone by using the Yellow River silt.
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