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Undrained Shear Strength of Normally Consolidated Clays with Different Plastic Properties
The presence of clay is very significant in affecting the behavior of soil. In other words, the strength of soil is governed by the clay, especially for the clay with very low strength. Thus, when a geotechnical engineering problem related to the soil containing clay, engineers are required to figure out an appropriate strategy to deal with the associated problems. To realize the behavior of clay is important to reduce the risk in geotechnical engineering problem in weak clay. This paper presents the effect on the mechanical behavior of NC (Normally Consolidated) clay with different plasticity indices (PI) by controlling different confining pressures. The soil sample was taken from Hsin-yi district in Taipei city in Taiwan. The CU (Consoildated-Undrained) tests were performed by controlling the initial void ratio, e=1.25, adding three different contents of Bentonite, 3%, 6% and 10% to change the plasticity index of the clay. Three different confining pressures, 50, 75 and 100 kPa, were applied in the tests. The results indicate the higher content of Bentonite mixed with the clay is found to increase the plasticity of the clay. However, the strength of the clay decreases due to the presence of the Bentonite. The critical state soil model, Cam-clay model can successfully capture the behavior of NC clay with a higher plasticity while the Modified Cam-clay model is good for being used in predicting the behavior of low plasticity clay.
Undrained Shear Strength of Normally Consolidated Clays with Different Plastic Properties
The presence of clay is very significant in affecting the behavior of soil. In other words, the strength of soil is governed by the clay, especially for the clay with very low strength. Thus, when a geotechnical engineering problem related to the soil containing clay, engineers are required to figure out an appropriate strategy to deal with the associated problems. To realize the behavior of clay is important to reduce the risk in geotechnical engineering problem in weak clay. This paper presents the effect on the mechanical behavior of NC (Normally Consolidated) clay with different plasticity indices (PI) by controlling different confining pressures. The soil sample was taken from Hsin-yi district in Taipei city in Taiwan. The CU (Consoildated-Undrained) tests were performed by controlling the initial void ratio, e=1.25, adding three different contents of Bentonite, 3%, 6% and 10% to change the plasticity index of the clay. Three different confining pressures, 50, 75 and 100 kPa, were applied in the tests. The results indicate the higher content of Bentonite mixed with the clay is found to increase the plasticity of the clay. However, the strength of the clay decreases due to the presence of the Bentonite. The critical state soil model, Cam-clay model can successfully capture the behavior of NC clay with a higher plasticity while the Modified Cam-clay model is good for being used in predicting the behavior of low plasticity clay.
Undrained Shear Strength of Normally Consolidated Clays with Different Plastic Properties
Hsieh, Chung-Ching (author) / Ho, I-Hsuan (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 2422-2431
2012-03-29
Conference paper
Electronic Resource
English
Undrained Shear Strength of Normally Consolidated Clays with Different Plastic Properties
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