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THE STRENGHT PARAMETERS OF SAW-DUST ASH ON THE GEOTECHNICAL PROPERTIES OF LATERITIC SOIL FOR ROAD CONSTRUCTION PURPOSES IN GHANA

Etornam Bani Fiadonu, Richard Mensah, Kingsford Acquah

Abstract


The strength parameters of saw dust ash on the geotechnical properties of lateritic soil for road construction purposes in Ghana have been investigated. The lateritic soil sample collected was subjected to the following test; Atterberg limits, compaction and California Bearing Ratio Test. The tests were conducted in accordance with BS: 1377 and AASHTO M145 standards. A varying percentage of the saw dust ash in order of 2%, 4%, 6%, 8% and 10% were mixed with the lateritic soil. The influence of the ash content on the Atterberg limits, compaction and California Bearing Ratio were investigated. The plasticity index of the lateritic soil reduced from 17.9% to 16.8% at 12% addition of the saw dust ash. The maximum dry density (MDD) reduced from 2.09Mg/m3 to 1.90Mg/m3at 12% addition of the saw dust ash however, the optimum moisture content increased from 14.14% to 16.71% at 12% addition of the saw dust ash. The California Bearing Ratio value increased from 59% to 74% at 10% addition of the saw dust ash. From a trend analysis, it was indicated that, there was a significant linear relationship between saw dust ash, California Bearing Ratio and the optimum moistures. Natural soils with high moistures were not investigated in this study.


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References


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DOI: https://doi.org/10.37628/jgget.v6i1.578

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