Geotechnical and Geological Engineering

, Volume 36, Issue 5, pp 3203–3209 | Cite as

Effect of Inclusion of Randomly Oriented Sisal Fibre on Some Geotechnical Properties of Lateritic Soil

  • A. Tanko
  • T. S. Ijimdiya
  • K. J. Osinubi
Original Paper


This paper presents the results of the evaluation of the reinforcing effect of randomly oriented sisal fibre on some geotechnical properties of lateritic soil. The sisal fibre was included in 0.25% stepped percentage (i.e., 0.25, 0.5, 0.75, 1.0%) of fibre content by dry weights of the soil using fibre lengths 1.5, 2.5, 3.5, 4.5 and 6.0 cm; that correspond to five aspect ratios (l/d). The soil–fibre mixtures were then compacted with the British Standard light energy. Aside index tests performed on the natural lateritic soil, unconfined compression, California bearing ratio (CBR) and durability tests were carried out on lateritic soil–sisal fibre mixtures. Tensile strength tests were performed on sisal fibres embedded in the soil for up to twelve (12) weeks to simulate their bio-degradability. Peak unconfined compressive strength value of 494 kN/m2 and CBR value of 13% for 24 h soaking period were recorded for 0.75% sisal fibre content and 3.5 cm sisal fibre length. Two-way statistical analysis of variance on the laboratory test results showed a statistically significant effect of the sisal fibre inclusion on some of the geotechnical properties of the lateritic soil considered. Based on strength and durability criteria an optimal 0.75% sisal fibre content for 3.5 cm fibre length is recommended for inclusion in lateritic soil for use as a sub-grade material in road construction.


California bearing ratio Durability Lateritic soil Sisal fibre Unconfined compressive strength 


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil EngineeringAhmadu Bello UniversityZariaNigeria

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