EAS Publisher | Effectiveness of Costus asplundii maas as Admixture of Lime in Soil Stabilization of Highway Pavement

Effectiveness of Costus asplundii maas as Admixture of Lime in Soil Stabilization of Highway Pavement

DOI : https://doi.org/10.36349/easjmb.2023.v06i02.001

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The study investigated the performance of lime and bagasse ash composite as soil stabilizer. The bagasse ash was obtained from Costus asplundii maas. Soil samples collected along a newly constructed road in Rivers State, Nigeria were prepared and analyzed for effect of the composite stabilizer on swelling potential, volume change, maximum dry density (MDD), optimum moisture content (OMC), consistency limits, California bearing ratio (CBR) and unconfined compressive strength (UCS). The results revealed that swelling potential, volume change MDD, OMC, liquid limit (LL), plastic limit (PL) and plasticity index (PI) of the stabilized lateritic soil decreased with increasing proportion of lime-bagasse ash composite, while CBR (unsoaked and soaked soil samples) and UCS were with increasing proportion of lime-bagasse ash composite. This study established that the optimum proportion of bagasse ash is 10% and that inclusion of an appropriate proportion of bagasse ash in lime in soil stabilization would enhance the properties of soil suitable for road pavement. Hence, Costus asplundii maas is recommended to be used in soil stabilization, particularly as composite material with lime.

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