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Durability analysis of chemically stabilized fiber reinforced clayey soil
(Department of Civil, NITS, 2024-07) Acharjee, Abhash
This study aims to investigate the effect of varying percentages of lime, ground granulated blast furnace slag (GGBS), rice husk ash (RHA) and coir fiber on the Atterberg’s limit and durability of the samples. It was observed that addition of chemical stabilizers reduced the plasticity index of the soil samples rendering the soil less plastic. This could potentially reduce the swelling and shrinkage of clay soil. The incorporation of lime, GGBS or RHA reduced the linear shrinkage of the soil but higher dosage of lime made the soil more brittle indicated by multiple cracks on the surface of the soil sample. It was observed that when part of the soil is replaced with lime, GGBS, RHA and coir fiber and were tested for durability after curing of 28 days by subjecting them to alternating wetting and drying cycles the inclusion of lime, RHA, GGBS and coir fiber facilitates pozzolanic reactions, enhancing soil binding and reducing plasticity. The results show significant improvements in the durability of the treated soils compared to untreated clay. The inclusion of 5% lime, 10% GGBS and 1% coir fiber rendered the best performance after being subjected to wetting drying cycles with a UCS of 743.2 kPa after the 10th cycle and cumulative mass loss of 11.52% of its initial mass after 10th cycle.