Enhancing the strength characteristics of expansive soil using bagasse fibre

Publication Type:
Conference Proceeding
Springer Series in Geomechanics and Geoengineering, 2018, (216849), pp. 792 - 796
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© 2018, Springer Nature Switzerland AG. This paper presents an experimental investigation on the compressive and shear strength characteristics of expansive soil reinforced with randomly distributed bagasse fibre. Bagasse fibre, an agricultural waste by-product left after crushing of sugar-cane for juice extraction, was employed in this investigation as reinforcing components for expansive soil reinforcement. To comprehend the bagasse fibre reinforcement effects on the strength of reinforced soils, a series of experimental investigations was carried out. They include unconfined compressive strength (UCS) tests, using a conventional compression machine, and shear strength tests, using advanced triaxial compression apparatus, conducted on non-reinforced and fibre reinforced soil samples with different percentages of randomly distributed bagasse fibre from 0% to 2%. Following the compression tests, scanning electron microscopy (SEM) analysis was conducted on selected soil samples to evaluate the micromechanical reinforcement between soil particles and fibre surface. The obtained test results indicated that bagasse fibre reinforcement not only significantly improved the compressive strength, the initial deformation modulus, and the shear strength of reinforced soils, but it also considerably transformed the reinforced soil behaviour from strain softening to strain hardening by curtailing the post-peak shear strength loss.
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