American Society of Civil Engineers


Development of Modulus-Soil Moisture Model for Subgrade Soils Using Suction Control Testing System


by Dong-Soo Kim, (Professor, Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusung-dong, Yusung-gu, Daejeon, Korea; E-mail: dskim@kaist.ac.kr), Won-Seok Seo, (Postdoctoral Researcher, Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusung-dong, Yusung-gu, Daejeon, Korea E-mail: hemlock@kaist.ac.kr), and Sei-Hyun Lee, (Graduate student, Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusung-dong, Yusung-gu, Daejeon, Korea E-mail: crazyisei@kaist.ac.kr)
Section: Pavement Foundation, pp. 256-263, (doi:  http://dx.doi.org/10.1061/40866(198)32)

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Document type: Conference Proceeding Paper
Part of: Pavement Mechanics and Performance
Abstract: In a pavement structure, moisture is an environmentally driven variable that can significantly affects the resilient modulus of subgrade soils. In this study, the variations of deformational modulus with post compaction moisture content were investigated for three subgrade soils using suction control resonant column and torsional shear (RC/TS) tests. A series of tests were performed to evaluate the modulus values using specimens compacted at various moisture contents and compared to the results obtained by post compaction method by suction controlling. Applicability of existing models which relate the modulus and soil moisture was assessed using test results and a model which relates the modulus and soil suction was newly proposed.


ASCE Subject Headings:
Soil water
Subgrades
Soil suction
Pavements