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Laboratory and numerical analysis on the effect of using coconut fibre as additive towards residual shear strength of soil for slope construction
Juhaizad Ahmad1, Nurfarihah Raihan Rughan2, Anas Ibrahim3, Mohd Ikmal Fazlan Rosli4, Abdul Samad Abdul Rahman5.
Rapid development of Malaysia has caused population growth in urban
areas. This includes new development near slope areas. Utilization of waste
material such as coconut fiber could help to increase the slope stability.
There is a limited study on the effects of coconut fibre as an additive for slope
construction. This study aims to compare the shear strength between treated
and untreated residual soil and to assess the Factor of Safety (FOS) with
coconut fibre addition using Slope/W. A total of 15 shear box samples were
set at the same percentage of coconut fibre (1% by weight of soil). Coconut
fibre with different length of 15mm, 25mm, 35mm and 45mm was used in the
study. It was found that coconut fibre could increase the shear strength. The
optimum length of coconut fibre to achieve the maximum friction angle is
35mm, with soil internal friction angle of 52.15áµ’. Moreover, the Slope/w
analysis is conducted to analyse the slope's safety factor. The slope's safety
factor increased significantly with the addition of coconut fibre. Based on
the findings, this research could shed some light on the effect of coconut fibre
incorporated in soil as an additive to improve the shear strength. Using
coconut fibre in slope stabilisation could reduce slope failure and at the same
time could save the environment by utilizing this waste material.
Affiliation:
- Universiti Teknologi MARA Cawangan Pulau Pinang, Kampus Permatang Pauh, Malaysia
- Universiti Teknologi MARA Cawangan Pulau Pinang, Kampus Permatang Pauh, Malaysia
- Universiti Teknologi MARA Cawangan Pulau Pinang, Kampus Permatang Pauh, Malaysia
- Universiti Teknologi MARA Cawangan Pulau Pinang, Kampus Permatang Pauh, Malaysia
- Universiti Teknologi MARA Shah Alam, Malaysia
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