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A Experimental Study on the Proper Particle Gradation of Sub-base to Consider the Recent Climate Change  

Choi, Jaesoon (Seokyeong University Department of Civil & Architectural Engineering)
Han, Nuri (Seokyeong University Department of Civil & Architectural Engineering)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.7, 2013 , pp. 51-56 More about this Journal
Abstract
Recently, a top record of hourly-based rainfall has been changed annually and flood damages of road have increased. To solve this problem, pavements for drainage were developed and practically constructed but there was no considerations on sub-base. In this research, we proposed standard for distribution of particle size of sub-base to consider strength characteristic and drainage property. We focused to compare coefficients strength and permeability by laboratory tests. Prior to tests, 4 samples were selected under the consideration on the international or domestic design guideline. In the tests, strength characteristics were compared with resilient modulus. Also, permeability characteristics were compared with coefficient of upward and downward permeability. Resilient modulus was determined with MR test using cyclic triaxial testing system. Two permeability tests were carried out. One is variable head permeability test for downward drainage and the other is Rowe Cell test for upward drainage. In the case of Rowe Cell test, middle-sized sampler with 150mm diameter was used for this study. Consequentially, we tried to find the optimum distribution of particle size to satisfy both of strength and permeability characteristics for sub-base.
Keywords
Pavement; Sub-base; Base; Permeability test; Rowe Cell; $M_R$ test; Resilient modulus; Climate change;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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