A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An Experimental Study of Using Biopolymer for Liquefaction Mitigation of Silty Sand—A Sustainable Alternative
Several non-conventional and sustainable methods for liquefaction mitigation like use of biopolymer additive in soil are gaining popularity in the recent years. The present study involves exploring the use of biopolymers as a sustainable substitute for mitigation of liquefaction. It includes the results of 10 numbers of strain-controlled cyclic triaxial tests at different strain levels (0.3, 0.5, 0.8, 1 and 1.2%). The stress path behavior and pore pressure response of the treated and untreated silty sand have been analysed from the test results. It was found that the excess pore water pressure (PWP) buildup in silty sand, obtained from Wayanad district in Kerala, was significantly reduced as a consequence of treatment using agar biopolymer. The excess PWP ratio reduced by 53, 41, 36, 33 and 29% for 0.3, 0.5, 0.8, 1 and 1.2% strain amplitude, respectively. Also, the excess PWP increased with increase in strain magnitude. The stress paths clearly indicated that the stabilization using biopolymer prevented liquefaction failure and enhanced the shear strength of soil. This was because of the biopolymer gel that was present within the pore spaces of treated soil restricted the pore pressure buildup and also increased the soil particle to particle contact which enhanced the overall shear resistance.
An Experimental Study of Using Biopolymer for Liquefaction Mitigation of Silty Sand—A Sustainable Alternative
Several non-conventional and sustainable methods for liquefaction mitigation like use of biopolymer additive in soil are gaining popularity in the recent years. The present study involves exploring the use of biopolymers as a sustainable substitute for mitigation of liquefaction. It includes the results of 10 numbers of strain-controlled cyclic triaxial tests at different strain levels (0.3, 0.5, 0.8, 1 and 1.2%). The stress path behavior and pore pressure response of the treated and untreated silty sand have been analysed from the test results. It was found that the excess pore water pressure (PWP) buildup in silty sand, obtained from Wayanad district in Kerala, was significantly reduced as a consequence of treatment using agar biopolymer. The excess PWP ratio reduced by 53, 41, 36, 33 and 29% for 0.3, 0.5, 0.8, 1 and 1.2% strain amplitude, respectively. Also, the excess PWP increased with increase in strain magnitude. The stress paths clearly indicated that the stabilization using biopolymer prevented liquefaction failure and enhanced the shear strength of soil. This was because of the biopolymer gel that was present within the pore spaces of treated soil restricted the pore pressure buildup and also increased the soil particle to particle contact which enhanced the overall shear resistance.
An Experimental Study of Using Biopolymer for Liquefaction Mitigation of Silty Sand—A Sustainable Alternative
Springer Transactions in Civil and Environmental Engineering
Reddy, Krishna R. (editor) / Pancharathi, Rathish Kumar (editor) / Reddy, Narala Gangadhara (editor) / Arukala, Suchith Reddy (editor) / Smitha, S. (author) / Rangaswamy, K. (author)
Advances in Sustainable Materials and Resilient Infrastructure ; Chapter: 20 ; 297-308
2022-03-13
12 pages
Article/Chapter (Book)
Electronic Resource
English
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