Performance of Periwinkle Shell Ash Blended Cement Concrete Exposed to Magnesium Sulphate
Abstract: The study examined
the compressive strength of periwinkle shell ash (PSA) blended cement concrete
in magnesium sulphate medium. Specimens were prepared from designed
characteristics strength of 25 MPa. The cement replacement with PSA ranged
between 0 and 40% by volume. A total of 180 cube specimens were cast and cured
in water. At 28 days curing, 45 specimens each were transferred into magnesium
sulphate of 1%, 3%, and 5% solution, while others were continuously cured in
water and tested at 62, 92, and 152 days. The results revealed a higher loss in
compressive strength with the control mix, and that it increases with increased
in MgSO4 concentration and exposure period, whereas, the attack on the PSA
blended cement concrete was less and the least value recorded by 10% PSA
content. Therefore, the study concluded that the optimum percentage replacement
of cement with 10% PSA could mitigate magnesium sulphate attack.
Keywords: Blended cement,
compressive strength, durability, magnesium sulphate, periwinkle shell ash
Author: Umoh, A.A., Olusola,
K.O
Journal Code: jptsipilgg130017
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