03275nam a2200373 a 4500 20260818094003.0 .b10209645 AIT Thesis no.GT- 81-25 Kim, Gyo Won Dispersive soils in Northeastern Thailand Bangkok : Asian Institute of Technology, 1982 vii, 73 p. Thesis ; no. GT-81-25 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology Thesis (M. Sc.) - Asian Institute of Technology, 1982 Tests on the physical, chemical and mineralogical properties on the soils from 3 selected sites of dispersive soils and 1 selected site of nondispersive soil are carried out in the field and laboratory during this study. In order: to find out the relationship between clay contents and dispensability of the soil, some specimens are artificially mixed with a certain amount of clay in the laboratory and tested by means of pinhole tests. The artificial soils are dispersed in pinhole tests regardless of its clay content. For the relationship between the dispersity and a water content and/or a density of the specimen on natural soils, pinhole tests are also carried out at a different water content and different tamps per layer. Natural soils are dispersed in pinhole tests regardless of their water content and a number of tamps per layer. Chemical properties on the soil saturation extract and reservoir water are also determined by means of sodium adsorption ratio(SAR), exchangeable sodium percentage(ESP) and pH. The dispersive soils in the region have ranges of 1.8-6.7 SAR, 1.4-7.9 ESP and 5.4-9.0 pH, while a nondispersive soil has only 0.5 SAR, no ESP and 4.3 pH. The main minerals of the clay fraction in the soil are montmorillonite, kaolinite and illite which are analyzed by the X-ray diffraction method. The dispersive soils in this region have somewhat higher SAR, ESP and pH value chemically, and higher content of a montmorillonite mineralogically than those of the nondispersive soil. The dispersive soil area has distinct features, i.e., a pseudocarps and cloudy water which are good indicators of the dispersive soil area in the field. Soils Thailand, Northeastern Testing Prinya Nutalaya, Chairperson Balasubramaniam, A.S., Examination Committee Yudhbir, Examination Committee Government of Thailand, Scholarship Donor Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21240 .b10209645 mnait u 240909 2 951012 m a u 0 mnait mnarc 22 40 Barcode : 30050120657209 CREATED : 2014-01-04 RECORD # : i12784333 LPATRON : 1026124 LCHKIN : 2016-09-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160070156 CREATED : 2016-05-17 RECORD # : i1298002x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 30926 30926 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.GT- 81-25 30050120657209 2026-08-18 09:40:03 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.GT- 81-25 30050160070156 2026-08-18 09:40:03 1 2026-08-18 40