Journal of Applied Sciences and Environmental Management

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Effect of sisal fibre on partially replaced cement with Periwinkles Shell Ash (PSA) concrete

J.O. Afolayan, U.N. Wilson, B Zaphaniah


An investigation on the effect of sisal fiber on partially replaced cement with Periwinkle Shell Ash in Concrete was carried out. Sisal fiber of 40mm length which forms 1% of the mix by weight with Periwinkle shell Ash as a partial replacement for cement was used to cast the concrete. Compressive strength test was carried out using 0%, 5%, 10%, 15%, 20%, 25% and 30% of Periwinkle Shell Ash as partial replacements of cement at different curing ages of 7, 14, 21 and 28 days. A skewed result was observed showing a significant increase in the compressive strength recorded in 21 and 28 days of curing whose peaks are at 5% replacement of PSA in the fiber-reinforced-concrete after which, there was a continuous decline in compressive strength of concrete as the percentage of PSA increased. The peak compressive strength value of 28.8 N/mm2 was obtained at 40mm sisal fiber and at 28 days curing age. This is followed by a compressive strength value of 26.15 N/mm2 after 21days of curing, all gotten at 5% PSA replacement. This makes 5% the optimal and apparently an exclusive PSA content for Sisal fiber-reinforced concrete.

Keywords: Sisal fibre, Periwinkle shell ash (PSA), Compressive strength, Concrete

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