Kittipong Suppatkul creator Brenner, R.P. Chairperson Balasubramaniam, A.S. Examination Committee Holmberg, Soren Examination Committee The Royal Netherlands Government Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1979 continuing eng 250 p. California Bearing Ratio (CBR) and plate bearing tests (12" and 30" m. plate) were conducted in a shallow field test pit on Bangkok Clay and in a 2 deep concrete test pit in which a pavement structure consisting of compacted clay, lateritic soil and crushed rock aggregate had been built. Extensive CBR testing was also performed in the laboratory on unoaked and soaked samples of clay, lateritic soil and crushed rock aggregate compacted at various efforts. CBR-values obtained in the concrete test pit were somewhat lower than laboratory values for all three materials in the unoaked condition, where as those measured in the field test pit were slightly higher. Design CBR values were selected as 2%, 25% and 70% for the clay, lateritic soil and crushed rock, respectively. The coefficient of subgrade reaction, k, from 12" plate tests was about twice the value of the 3011 plate and the ratio of k-values between clay, lateritic soil and crushed rock was about 6:3 :1. In--situ soaking of clay greatly reduced the k-value. Results from repetitive plate bearing tests indicated a considerable decrease of allowable pressure with increasing number of load repetitions. Finally, the results were used for estimating the layer thickness in a rigid and flexible pavement using three different design procedures, A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Eng.) - Asian Institute of Technology, 1979 Pavements Design and construction Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B22355 http://203.159.5.9/ait-thesis/detail.php?q=B22355 090421 20260817163012.0