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Liquefaction Mitigation of Silty Sands Using Xanthan Biopolymer
Liquefaction is one of the major consequences that occur during any dynamic or earthquake events. The evidence from the past earthquakes shows that the liquefaction induced failures are more severe in the case of silty sands than clean sand or silt. The study of the application of gel-type biopolymers for various ground improvement methods has been gaining popularity over the past few years. It has been used for improving various soil properties like hydraulic conductivity, compressibility, shear strength, etc. The use of biopolymers from liquefaction mitigation perspective has not been much delved into. In the current study, the xanthan biopolymer has been utilized for studying the consolidated undrained shear strength of saturated silty sand. The study of pore pressure response and effective stress path of silty sand treated with xanthan biopolymer at different curing times (3, 7 and 28 days) and confining pressures (50, 100 and 150 kPa) has been studied. The excess pore pressure developed was reduced significantly due to biopolymer treatment. Also, about 50% increase in stress ratio was obtained for silty sand treated with 2% xanthan gum biopolymer. Thus, xanthan gum biopolymer was found to be a potential biopolymer for stabilizing silty sand against liquefaction.
Liquefaction Mitigation of Silty Sands Using Xanthan Biopolymer
Liquefaction is one of the major consequences that occur during any dynamic or earthquake events. The evidence from the past earthquakes shows that the liquefaction induced failures are more severe in the case of silty sands than clean sand or silt. The study of the application of gel-type biopolymers for various ground improvement methods has been gaining popularity over the past few years. It has been used for improving various soil properties like hydraulic conductivity, compressibility, shear strength, etc. The use of biopolymers from liquefaction mitigation perspective has not been much delved into. In the current study, the xanthan biopolymer has been utilized for studying the consolidated undrained shear strength of saturated silty sand. The study of pore pressure response and effective stress path of silty sand treated with xanthan biopolymer at different curing times (3, 7 and 28 days) and confining pressures (50, 100 and 150 kPa) has been studied. The excess pore pressure developed was reduced significantly due to biopolymer treatment. Also, about 50% increase in stress ratio was obtained for silty sand treated with 2% xanthan gum biopolymer. Thus, xanthan gum biopolymer was found to be a potential biopolymer for stabilizing silty sand against liquefaction.
Liquefaction Mitigation of Silty Sands Using Xanthan Biopolymer
Lecture Notes in Civil Engineering
Sitharam, T. G. (editor) / Parthasarathy, C. R. (editor) / Kolathayar, Sreevalsa (editor) / Smitha, S. (author) / Rangaswamy, K. (author) / Balaswamy Naik, P. (author)
2021-03-25
10 pages
Article/Chapter (Book)
Electronic Resource
English
Liquefaction Mitigation of Silty Sands Using Xanthan Biopolymer
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