摘要
采用压汞试验来研究水泥-膨润土固结体的微观孔隙结构特征,有助于从影响因素和机理上认识固结体的强度和渗透系数等宏观特性。试验研究结果表明:固结体的总孔隙体积、最可几孔径、各级孔隙分布以及临界孔径等孔结构特征与膨润土和水泥的用量密切相关。其中固结体的较大孔隙应主要由水泥水化产物构成,膨润土水化后会形成固结体的微小孔隙,并充填一部分大孔隙。
The microstructure features of voids in cement-bentonite slurrie are explored by mercury intrusion porosimetry （MIP） test. The research contributes to the knowledge of the strength and anti-seepage properties of cement-bentonite slurries from each affecting factor and mechanism. The study results show that the void structure characteristics, such as the total void volume, the probable void size, void distribution and critical void diameter, of the slurries are in direct relation to the amount of bentonite and cement in the mixture. The bigger voids of cement-bentonite slurries ought to he mainly composed of the cement hydration products. And the bentonite after hydration containing tiny pores will fill in part of big voids in the hardened paste.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2009年第4期90-94,共5页
Hydrogeology & Engineering Geology
基金
上海市重点学科建设项目资助(B308)
关键词
水泥-膨润土泥浆
微观结构特征
孔隙
压汞试验
cement-bentonite slurries
microstructure feature
void
mercury intrusion porosimetry （MIP）
