1 AIT Asian Institute of Technology

Compressibility of granular materials with variations of gradation and water content

AuthorThet Aung
Call NumberAIT Thesis no.GT-88-13
Subject(s)Granular materials--Testing

NoteA thesis submitted in partial fulfillment requirements for the Master of Science, School of Engineering and Technology
PublisherAsian Institute of Technology
Series StatementThesis ; no. GT-88-13
AbstractOne-dimensional compression tests were conducted on the mudstone granular materials using the Rowe cell consolidation apparatus. Th e test material was used as rockfill at Chiew Larn dam in Surat Thani province , Thailand. Emphasis was placed to understand the stressstrain behavior of the granular mat erials with the variations in gradation and water content. In analyzing the effect of gradation, the experimental program included the compression te sts on the samples from nine different gradation curves and the parameters including uniformity coefficient {Cu ) , maximum particle size and fine content (- #200 mesh ) were based upon. The samples from each gradation curves were tested in five different conditions: {l ) air-dry, ( 2) wet{almost fully saturated), {3)moist{w=8%), ' (4) initially dry then wet{wetting on air-dry sample ) and (5 ) initially moist then wet {wetting on moist sample ). The compaction tests were also done on the representative samples from all the gradation curves to obtain t h e maximum dry density and optimum moisture content. It was clearly observed that the compressibility increased with an increase in uniformity coefficient {the sample becomes well-graded), fine content and maximum particle size. Since the narrow difference in maximum particle size {8mm, 4.76mm and 3.35mm) high compressibility of the relatively well- graded materials of this study was likely to be contributed by the higher content of fines than the effect of grain-size distribution of the coarse fraction. The additional settlement due to wetting was distinct in the samples compacted in dry condition and the axial strain increases by 1.68 to 4.76% from dry to dry the n wet condition. The values of the additional axia l strain increase with an increase in fine content of the samples. For the samples prepared in moist condition{w = 8%) , the additional settlement due to wetting was negligible.
Year1989
Corresponding Series Added EntryAsian Institute of Technology. Thesis ; no. GT-88-13
TypeThesis
SchoolSchool of Engineering and Technology (SET)
DepartmentOther Field of Studies (No Department)
Academic Program/FoSGeotechnical and Transportation Engineering (GT)
Chairperson(s)Kuwano, Jiro
Examination Committee(s)Balasubramaniam, A.S. ;Rantucci, G.
Scholarship Donor(s)Government of Japan;
DegreeThesis (M.Sc.) - Asian Institute of Technology, 1989


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