Abstract: The study explored the effective use of composite soil stabilizers of irvinga gabonesis fibre + lime in combined action to improve the performance of problematic soils with swelling and shrinkage potentials and make trivial soils meet required standard of subgrade road pavement materials. Preliminary investigation results grouped the sampled lateritic soils at 100% natural state as A-2-6 SC and A-2-4 SM on the AASHTO classification schemes / Unified Soil Classification System and percentage (%) passing BS sieves #200, 28.35%, 40.55 %, 36.85%, 33.45% and 39.25%. Remarks on soil is poor and need to stabilize the soils paramount. Consistency limits (plastic index) of the soils at 100% natural state are 17.30%, 14.23%, 15.20%, 15.50% and 16.10%. Comparatively, stabilized soils compaction results showed corresponding increased values to percentage ratios of both MDD and OMC of stabilized soils. CBR Results showed increased in stabilized samples with optimum percentage ratios of 0.75 + 7.5% to soil. Beyond maximum ratio, cracks were noticed. Results obtained showed increased in UCS values corresponding to additives percentage. Results showed decreased in plastic index to corresponding percentage ratio of additives. Swelling potential of treated soil decreased with the inclusion of fibre + lime up to 0.75% +7.5% for lateritic soils. The entire results showed the potential of using irvinga gabonesis fibre + lime as admixtures in treated soils.
Keywords: Lateritic soils, Irvinga Gabonesis Fibre, Lime, CBR, UCS, Consistency, Compaction.
Title: Performance Characteristics of Stabilized Soils using Irvinga Gabonesis Fibre and Lime as Stabilizer
Author: Akpan Paul Paulinus, Letam Leelee Prince, Charles Kennedy
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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