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Effect of Rice Husk Ash on Cement Stabilized Laterite

Author(s): Musa ALHASSAN | Alhaji Mohammed MUSTAPHA

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 6;
Issue: 11;
Start page: 47;
Date: 2007;
Original page

Keywords: Laterite | Rice Husk Ash | Stabilization | Maximum Dry Density (MDD) | Optimum Moisture Content (OMC) | California Bearing Ratio (CBR) | Unconfined Compressive Strength (UCS)

Laterite soil collected from Maikunkele area of Minna, classified as an A-7-6 on AASHTO classification, was stabilized with 2-8% cement by weight of the dry soil. Using British Standard Light (BSL) compaction energy, the effect of Rice Husk Ash (RHA) on the soil was investigated with respect to compaction characteristics, California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) tests. Results obtained, indicate a general decrease in Maximum Dry Density (MDD) and increase in Optimum Moisture Content (OMC), all with increase in RHA Content (2-8%) at specified cement contents. There was also a tremendous improvement in the CBR and UCS with increase in the RHA content at specified cement contents to their peak values at between 4-6% RHA. The UCS values also improved with curing age. This indicates the potentials of using 4-6% RHA admixed with less cement contents for laterite soil stabilization.
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