POWER COEFFICIENT IN ONE POINT LIQUID LIMIT TEST FOR SOILS OF NORTHERN TURKEY AT VARIOUS TEMPERATURES
Abstract
In this study, the power coefficient of one-point liquid limit equation given by ASTM 4318-17 is evaluated for weathered volcanic deposits of Northern Turkey. Total of 35 soil samples taken from depths ranging from 0.2 m to 4 m from 8 different sites in the city of Rize and one site in Trabzon, Turkey are used, and a total of 77 Atterberg limit tests are conducted. Three different sample preparation methods are used: (1) starting from in-situ moisture content without any drying, (2) drying at 60C oven, (3) drying at 110C oven. For liquid limit determination by one-point method, the best fitting power coefficient is evaluated for different sample preparation conditions separately, and are compared with the power coefficient suggested by ASTM D4318-17. Soils used in this study are in ML-OL to MH-OH zones in plasticity chart and the liquid limit values vary in the range of 35% to 103% (moist preparation). Liquid limits obtained by multi-point method and the ones obtained by one-point method are found to be similar to each other. It is concluded that although the power coefficient changes (in the range of 0.106 to 0.133 with an average value of 0.120) due to sample preparation technique, they are close to ASTM-suggested power value of 0.121, and the differences in resulting liquid limits are negligibly small (0-2%).
Keywords
Kaynakça
- ASTM D2487-11, Standard Practice for Classification of Soils for Engineering Purposes (unified soil classification system), ASTM International.
- ASTM D4318–10, Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM International.
- Atterberg, A., 1911, “Uber die physikalische bodenuntei suchung and uber die plastizitat der tone int. mitt far bodenkunde”, Berlin, 1.
- Casagrande, A., 1932, “Research on the Atterberg Limits of Soils”, Public Roads, Vol.13, pp.121-136
- DIN 18 121 Teil 1, Teil 2, Wassergehalt,
- DIN 18 122 Teil 1, Teil 2, Zustandsgrenzen (Konsistenzgrenzen),
- Eden, W. J., 1955, “Trial of One-Point Liquid Limit Method”, Proceedings of Ninth Canadian Soil Mechanics Conference, Ottawa, December 15th to 16th 1955 (National Research Council for Canada), Appendix A. Eden, W. 1960. Use of a one-point liquid limit procedure. In Papers on Soils 1959 Meetings. ASTM International.
- Haigh, S. K., Vardanega, P. J., 2014, “Fundamental Basis of Single-point Liquid Limit Measurement Approaches”, Applied Clay Science, Vol. 102, pp. 8-14
Ayrıntılar
Birincil Dil
İngilizce
Konular
Mühendislik
Bölüm
Araştırma Makalesi
Yayımlanma Tarihi
1 Aralık 2018
Gönderilme Tarihi
20 Şubat 2018
Kabul Tarihi
17 Nisan 2018
Yayımlandığı Sayı
Yıl 2018 Cilt: 6 Sayı: 4