Conclusion
(i) Based on the index properties, the soil sample was classified to be
A-7-5 in the AASHTO rating and in the Unified Soil Classification
System, the soil sample was CH respectively, also, on the basis of the
chemical composition of the soil, the soil samples was classified as
laterite. Chemical composition of RHA showed that it was pozollan;
(ii) The addition of the RHA improved soil sample’s properties, the
addition of cement further improved the properties of the soil;
(iii) There are optimum amounts (RHA and Cement) of additives for
effectively stabilizing the soil sample;
(iv) The ANN models developed can adequately predict the CBR values of
cement-treated A-7-5 soil stabilized with Rice husk ash (RHA).