Abstract: The study observed the application of waste extracted bagasse fibre ash of costaceae lacerus blended with lime to improve the engineering geotechnical properties of an expansive soil subgrade for road pavement materials. Preliminary investigations proved the sampled soils poor and fell below the minimum requirement for such application. The soils are classified as A-7-6 of American Association of State and Transport Officials (AASHTO) soil classification system with plastic index properties of 20.33%, 20.35%, 21.85%, 26.30%, and 21.35% respectively of sampled roads. Compaction test results obtained showed increased values in both maximum dry density and optimum moisture content relatively to ratio percentage additives. Comparatively, stabilized clay soils California bearing ratio increased with increase in additives inclusion with optimum mix proportion of 7.5% + 7.5%. Cracks occurred beyond optimum mixed level. Unconfined compressive strength test results increased with varying additive percentages. Costaceae lacerus bagasse fibre ash and lime proved to be good composite materials combination in soil stabilization.
Keywords: Clay soils, costaceae lacerus bagasse ash, Lime CBR, UCS, Consistency, Compaction.
Title: Improvement of Expansive Soils with Blended Composite Materials as Stabilizers
Author: Terence Temilade Tam Wokoma, Charles Kennedy, Tobi Derebebeapade Stanisslous
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Research Publish Journals
