Abstract: The experimental study evaluated the engineering properties of soil with the inclusion of costus afer (Bush sugarcane bagasse fiber ash (BSBFA) at varying percentages. Results of compaction of soil between the relationship of optimum moisture content (OMC) and maximum dry density (MDD) of soil and bagasse ash inclusion. MDD and OMC results of lateritic and clay soils at 100% (0%) are 1.803KN/m3 and 1.640 kN/m3 and 11.79 Table 3.4 and 3.5 showed the results of compaction of soil between the relationship of optimum moisture content (OMC) and maximum dry density (MDD) of soil and bagasse ash inclusion. MDD and OMC results of lateritic and clay soils at 100% (0%) are 1.803kN/m3 and 1.640kN/m3 and 11.79% and 16.39%. At 2.5% to 10% bagasse ash inclusion, lateritic soil decreased from 1.803KN/m3 to1.589KN/m3 and of clay, 1.640KN/m3 to 1.500KN/m3. While OMC increased from 11.79% to 20.10% (latrite) and 16.39% to 24.61% (clay). Obtained results of CBR test for bagasse fibre ash inclusion of 2.5% to 10% increased from 9.8% to 15.2% (Unsoaked) and 7.% to 13.6% (Soaked) for laterite and 7.6% to 13.92% (Unsoaked) and 6.9% to 11.47% (Soaked) for clay, this showed good remarks to AASHTO classification and to FMW standard. Results of lateritic and clay soils at 100% (0%), 2.5% to 10% BSBFA inclusion increased from 155kPa to 215.2kPa and 78.6kPa to 116.8kPa respectively. Consistency limits test showed the results of lateritic soils at 100% of LL 44.5%, PL 18.3%, IP 26.1%, with BSBFA inclusion increased to LL 51.4%, PL 24.1%., IP 26.7% and clay soil at 100% LL 57.2%, PL 23%, IP 24.2% and clay treated soil increased to LL 58.4%, PL 24.7% and 25.7%. Stabilization was found to satisfy subgrade requirements. The entire results showed the potential of using BSBFA as admixture in soils of clay and laterite.
Keywords: Clay and lateritic soils, Costus Afer ash, CBR, UCS, Consistency, Compaction.
Title: Stabilization of Deltaic Soils Using Costus Afer Bagasse Fibre Ash as Pozzolana
Author: Charles Kennedy, Isaac Olufemi Agbede, Terence Temilade Tam Wokoma
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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