Experimental studies on the application of coir fiber for mitigating liquefaction in sands
Experimental studies on the application of coir fiber for mitigating liquefaction in sands
One of the major earthquake risks is sand liquefaction, which has caused numerous global losses. Grouting and densification are two common yet pricey liquefaction mitigation methods. Coir fiber is one of the most important by-products of the coconut business worldwide. The excellent tensile strength of coir fiber can be used to improve the resistance of sand to liquefaction. The effectiveness of coir fiber in liquefaction mitigation is experimentally investigated in this work. For this, a series of stress-controlled constant volume cyclic simple shear tests were run on sand specimens reinforced with various fiber contents of 0.25%, 0.5%, and 0.75%, and test results were compared. Test results showed that the liquefaction resistance improved as the fiber content increased. Liquefaction resistance increased to a maximum extent of 622% for sand reinforced with 0.75% coir fibers. Also, coir fibers were found to be beneficial in arresting the shear deformations in the specimen. Fiber contents beyond 0.75% are difficult to mix for practical purposes as they cause segregation and entanglement of the fibers.
B. Lakkimsetti; Gali Madhavi Latha
9th International Congress on Environmental Geotechnics (ICEG2023)
Human-Induced and Natural Disaster Mitigation
Liquefaction Engineering, Geoenvironmental Engineering
https://doi.org/10.53243/ICEG2023-435
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