1 AIT Asian Institute of Technology

Engineering properties of a dispersive soil

AuthorShieh, Jia-lin
Call NumberAIT Thesis no.GT- 80-09
Subject(s)Soil stabilization--Testing
NoteA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
PublisherAsian Institute of Technology
AbstractA soil (sandy clay) which showed erodible and dispersive nature according to the field tests was taken from the Lara Sam Lai darn site . Four tests were employed to identify and confirm this nature: the crumb test and the dilution-turbidity test in the field; the pinhole test and soil chemistry analysis in the laboratory. These tests give a good correlation and lead to the recognition of this soil as a erodible and dispersive soil. Factors affecting the dispensability of this soil were studied to see if any method. can control the soil dispersion effectively. Test results show that water treatment could be a promising means besides soil chemical stabilization to render the soil nondispersive. Engineering properties such as index properties, compaction characteristics, CBR tests, unconfined compression tests, and perm ea.bi Ii ty tests were, investigated. Soaked test condition for the CBR and unconfined compression tests were also performed. Test results show t h a t soaked condition resulting in soil dispersion can partly cause the soil to have a relatively low CDR value , unconfined compression strength, and coefficient of permeability. From the corrective action's view, lime stabilization of the soil is considered. Optimum amount of lime was determined by the criteria of three requirements, i.e., lime consumption requirement, resistance to dispersive erosion requirement and strength requirement. And 3% lime was take n as the optimum lime content for this sandy clay. The engineering properties of the lime stabilized compacted soil were then investigated to see the effectiveness of the lime to the improving of the soil properties. Test results show that. lime is very effective in improving not only the soil dispersity but also other: soil properties. It decreases the soil plasticity and increase the soil permeability. In addition, it renders the soil nondispersive and gives the soil a higher strength both in the soaked and unsoaked conditions.
TypeThesis
SchoolSchool of Engineering and Technology
DepartmentDepartment of Civil and Infrastucture Engineering (DCIE)
Academic Program/FoSGeotechnical and Transportation Engineering (GT)
Chairperson(s)Surachat Sambhandharaksa ; Prinya Nutalaya
Examination Committee(s)Tomiolo, Andrea ; Balasubramaniam, A.S.
Scholarship Donor(s)Government of Republic of China
DegreeThesis (M. Eng.) - Asian Institute of Technology, 1981


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