함수비 변화에 따른 다짐 화강토의 인장강도 특성
Tensile Dtrength Characteristics of Compacted Granite Soils with Variation of the Molding Moisture Contents
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Abstract
The soil samples used in this study were prepared with the residual granite soils passed through the #4 sieve and obtained from Pocheon in Gyeonggi-do. Specifically, five types of samples were prepared. Sample A which is a natural state soil was classified as SM according to the USCS. Samples of B, C, D, and E were prepared by mixing Sample A with bentonite and were classified as SC according to the USCS. The plasticity indexes of samples B, C, D, and E were 15, 25, 30, and 40, respectively. The specimens, whose dimensions are 100mm by 127.5mm, were prepared by A method of ASTM D 698 with the Proctor mold. In experiments, the loading with the 1%/min was applied. Four different disk diameters, 13mm, 26mm, 38mm, and 52mm were used in the Improved Unconfined Penetration (IUP) tests. To compare the tensile strengths, the split tensile tests were also conducted on the same specimens used for the IUP tests. To find out the effects of moisture contents, plasticity Index of specimens on the tensile strength, six different water contents were used for making a specimen.
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