Effect of Sulphate Attack on the Strength of Cement Brands Blended with Cassava Peel Ash

Effect of two sulphate solutions on the strength of blended cassava peel ash (CPA) - cement mortar was investigated. CPA used to replace each brands of the Portland cement at a proportion of 20% by weight. Mortar of mix ratio 1:3 was prepared and 300 small mortar beams were cast and cured in fresh water for 28 days then in 50g/l concentration of sulphate solution of Calcium and Sodium separately for 90 days with the control remaining in fresh water for the periods. The results showed a varying effect of the sulphate solution on the different brands of cement both on the flexural and compressive strength. It was concluded that CPA possessed potential to mitigate effect of sulphate attack on some selected brands of cement. Keywords— cassava peel ash, concentration, sulphate solution, curing ages