Abiola, S.O., Molemo, S., Muluvhu, M.E., Zitholele, M.V., Sephai, K. and Kupolati, W.K. 2016. IMPROVING THE STRENGTH PROPERTIES OF SUBGRADE SOILS WITH FLY ASH. LAUTECH Journal of Engineering and Technology. 10, 2 (Aug. 2016), 79–83.