MICROSTRUCTURE AND CHEMICAL PROPERTIES OF CEMENT TREATED SOFT BANGLADESH CLAYS

SOILS AND FOUNDATIONS

MD. KAMAL UDDIN²  MD. MOKHLESUR RAHMAN¹  ABU SIDDIQUE³ 

[1] Department of Civil Engineering, Dhaka University of Engineering and Technology;Institute of Appropriate Technology, Bangladesh University of Engineering and Technology;Department of Civil Engineering, Bangladesh University of Engineering and Technology

关键词: cement treated clay;    cementation bond;    clay clusters;    clay-water/cement ratio;    fabric;    high water content;    microscopy;    microstructure;    mineralogy;    soil chemical test;    (IGC: F2);   

DOI  :  10.3208/sandf.50.1

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(10)Cited-By(1)This paper examines the relationship between the microstructure and chemical properties of soft Bangladesh clays due to cementation. The microstructure was investigated using X-ray diffraction, scanning electron microscopy, pH measurement, specific surface area and soil chemical tests. The results indicate that a multitude of changes occurred in the properties and behavior of cement-treated clays that can be explained by the interaction between four underlying microstructural mechanisms. That is, it is suggested that the hydrated lime is formed by hydration, which causes the flocculation of the little clay particles, by the preferential attack of the calcium ions on kaolinite rather than on illite and monmorillinite in the pozzolanic reaction, by surface deposition and shallow infilling by cementitious products such as calcium silicate hydrate and calcium alumino silicate hydrate (CSH and CASH) on clay clusters, and finally, by the presence of water trapped within the clay clusters. The chemical properties of the cement-treated clays were found to depend on the plasticity of soil.

【 授权许可】

Unknown