Durability analysis of chemically stabilized fiber reinforced clayey soil
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Date
2024-07
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Department of Civil, NITS
Abstract
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.