Casagrande와 원추관입시험에 기초한 액성한계 실험결과 비교연구
Comparative Study on the Liquid Limit Based on the Casagrande Method and Fall cone Tests
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In this study, the liquid limit tests were conducted on Paju clay with different test methods and different testers and the rest of conditions were the same. To do this, six testers, who already have the experience of liquid limit test, participated and Casagrande method and fall cone test were employed. From the test results, the fall cone test showed 4% higher liquid limit, and the variation of value of each tester was smaller than that of Casagrande. In addition, the level of proficiency of the fall cone test was shown to be stable as the number of experiments increased. In the case of one point methods based on both Casagrande and fall cone test, the liquid limit determined by fall cone test varied with small range compared to the Casagrande, and consequently, the fall cone test provided more stable liquid limit value than that of Casagrande.
Abstract
In this study, the liquid limit tests were conducted on Paju clay with different test methods and different testers and the rest of conditions were the same. To do this, six testers, who already have the experience of liquid limit test, participated and Casagrande method and fall cone test were employed. From the test results, the fall cone test showed 4% higher liquid limit, and the variation of value of each tester was smaller than that of Casagrande. In addition, the level of proficiency of the fall cone test was shown to be stable as the number of experiments increased. In the case of one point methods based on both Casagrande and fall cone test, the liquid limit determined by fall cone test varied with small range compared to the Casagrande, and consequently, the fall cone test provided more stable liquid limit value than that of Casagrande.
참고문헌 (8)
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- Vasilev, A. M., "Basic Principles of the Methods and Techniques of Laboratory Determination of Physical Soil Properties" (1959)
- Hansbo, S., "A New Approach to the Determination of Clay by the Fall Cone Test", Proceedings of the Swedish Geotechnical Institute, 14, pp.5~47 (1957)
- Sherwood, P. T., "An Investigation of Cone-Penetrometer Method for Liquid Limit", Geotechnique, 20, pp.203~208 (1970)
- Nagaraj, T. S., "Re-Examination of On-Point Method of Liquid Limit Determination", Geotechnique, 31(3), pp.413~425 (1981)
- Soils-Determination of Liquid Limit by the Swedish fall Cone Test Penetrometer Method and Determination of the Plastic Limit, "CAN", BNQ, 1986, CAN[DOI]
- Leroueil, S., "Liquid Limits and Fall Cones", Canadian Geotechnical Journal, 33(5), pp.793~798 (1996)
- The International Organization for Standardization, "ISO", IEC17043, ‘'Conformity assessment-General requirements for proficiency testing’', 1st Ed, 2010