岩土力学2013，Vol.34Issue(3)：751-756,6.
垃圾焚烧飞灰水泥固化体强度稳定性研究
Study of strength stability of municipal solid waste incinerator fly ash solidified by cement
摘要
Abstract
According to the technical requirements of safe disposal of municipal solid waste incinerator (MSWI) fly ash, the fly ash is solidified by cement. The unconfined compression strength and destruction characteristics of fly ash solidified blocks with different cement contents, curing times and soaking times are studied. Then the erosion mechanism of leachate is analyzed. The test results show that the fly ash solidified blocks are destructed quickly after soaking in leachate with cement content less than 5% and curing time less than 3 days. The erosion of leachate has a great influence on the strength of fly ash solidified blocks. The fly ash solidified blocks present an obvious strain softening characteristic after soaking. The strength of fly ash solidified blocks without soaking in leachate accords with ths mode of y=α[1-exp(-bt)]. With the increase of cement content and curing time, the unconfined compression strength increases and ihe failure strain decreases. But with the increase of soaking time, the strength increases firstly and then decreases; the turning point is about on 5-7 days; and the failure strain increases linearly. The erosion mechanism is that leachate can inhibit hydration reaction and destroy hydration products of fly ash solidified blocks. The results can provide theoretical basis and data support for the safe disposal of MSWI fly ash.关键词
垃圾焚烧飞灰/固化/稳定化/渗沥液/无侧限抗压强度Key words
municipal solid waste incinerator (MSWI) fly ash/ solidification/stabilization/ leachate/ unconfined compression strength分类
建筑与水利引用本文复制引用
李江山,薛强,胡竹云,李先旺..垃圾焚烧飞灰水泥固化体强度稳定性研究[J].岩土力学,2013,34(3):751-756,6.基金项目
国家自然科学基金专项基金(No.50927904)和面上项目(No.11002153) （No.50927904）
中国科学院知识创新工程重要方向性项目(No.KZCX2-YW-QN114). （No.KZCX2-YW-QN114）
