Abstract: The research examined the use of natural fibre bagasse ash (Costaceae Lacerus) and lime combinations in the alteration of expansive soils of unique characteristics of swelling, shrinkage and cracks. Stabilization with 2.5+2.5%, 5.0% + 5.0%, 7.5% + 7.5% and 10% + 10% (CLBFA + Lime) to lateritic soil ratio was deployed on failed road subgrade pavement. Preliminary investigations of the engineering Properties of soils at natural state are percentage (%) passing BS sieves #200 are 28.35%, 40.55%, 36.85%, 33.45% and 39.25% (laterite) and soils deposit belonged to the group A-2-6 SC and A-2-4 SM on the AASHTO classification schemes / Unified Soil Classification System. Swelling potential of treated soil decreased with the inclusion of CLBFA + Lime up to7.5% + 7.5%. Stabilized lateritic soils with additives decreased in plastic index properties with increased in additives inclusion percentages. Results showed that an increase in percentage ratio of combined stabilizers increases both MDD and OMC levels. CBR results showed and increased in values of both unsoaked and soaked with optimum level of inclusion at 7.5% + 7.5%., an adversed reduction was experienced beyond the peak giving way for cracks which led to failure. The entire results showed the potential of using CLBFA + Lime as admixtures in treatment of lateritic soils.
Keywords: Clay and lateritic soils, Costaceae Lacerus Bagasse Ash, CBR, UCS, Consistency, Compaction.
Title: Swelling Potential Reduction of Expansive Soils using Costaceae Lacerus Bagasse Fibre Ash and Lime
Author: Abidemi Olujide Ilori, Charles Kennedy, Gbinu Samuel Kabari
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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