Authors :
Awarri, A.W. ; Otto, C. G.
Volume/Issue :
Volume 9 - 2024, Issue 2 - February
Google Scholar :
http://tinyurl.com/yrbr4yfp
Scribd :
http://tinyurl.com/2hvc2hf5
DOI :
https://doi.org/10.5281/zenodo.10670206
Abstract :
An investigation of the behaviour of
undrained cohesion in fly ash stabilized lateritic soil was
carried out with respect to the strength of the lateritic
soil. This study looks into the possibility of using fly ash
to enhance the strength of lateritic soils for construction
purposes. The soil samples were obtained from three (3)
boreholes (BH1-BH3) at different locations at a depth of
1.0, 1.5 and 2.0 meters each. Several preliminary
laboratory tests, including specific gravity, moisture
content, bulk density, Atterberg limit, particle size
analysis and triaxial tests were carried out first to
characterize the lateritic soil. The stabilization process
was carried out with varying percentages of 5%, 10%,
15%, 20% and 25% fly ash by weight of the lateritic soil
to determine the undrained cohesion and shear strength
of the modified lateritic soil through triaxial test. The
result showed an increase in the undrained cohesion and
shear strength for the three (3) boreholes at the various
depths respectively upon adding fly ash up until 15%,
after which further increase in fly ash caused a decrease
in the undrained cohesion and strength. However, it was
discovered that 15% fly ash gave the optimum
undrained cohesion and shear strength of the modified
soil. This study will help the construction sector utilize
fly ash more effectively for stability, economic and
environmental benefits.
Keywords :
Undrained Cohesion, Fly Ash, Soil Stabilization, Lateritic Soil, Shear Strength.
An investigation of the behaviour of
undrained cohesion in fly ash stabilized lateritic soil was
carried out with respect to the strength of the lateritic
soil. This study looks into the possibility of using fly ash
to enhance the strength of lateritic soils for construction
purposes. The soil samples were obtained from three (3)
boreholes (BH1-BH3) at different locations at a depth of
1.0, 1.5 and 2.0 meters each. Several preliminary
laboratory tests, including specific gravity, moisture
content, bulk density, Atterberg limit, particle size
analysis and triaxial tests were carried out first to
characterize the lateritic soil. The stabilization process
was carried out with varying percentages of 5%, 10%,
15%, 20% and 25% fly ash by weight of the lateritic soil
to determine the undrained cohesion and shear strength
of the modified lateritic soil through triaxial test. The
result showed an increase in the undrained cohesion and
shear strength for the three (3) boreholes at the various
depths respectively upon adding fly ash up until 15%,
after which further increase in fly ash caused a decrease
in the undrained cohesion and strength. However, it was
discovered that 15% fly ash gave the optimum
undrained cohesion and shear strength of the modified
soil. This study will help the construction sector utilize
fly ash more effectively for stability, economic and
environmental benefits.
Keywords :
Undrained Cohesion, Fly Ash, Soil Stabilization, Lateritic Soil, Shear Strength.
