Workability and Flexural Strength Properties of Pigeon Pea Pod Ash Concrete
This study investigates the suitability of Pigeon Pea Pod (PPP) sourced from Abejukolo in Omala LGA, Kogi State – Nigeria for use as supplementary material in building construction. The Pigeon Pea Pod Ash (PPPA) was used to replace 10 to 40 percent of the Dangote Ordinary Portland Cement to produce Pigeon Pea Pod Ash concrete beams. Seventy-five (75) concrete beams were produced and labelled BPA0, BPA 10, BPA 20, BPA 30 and BPA 40 representing 0 to 40% replacement level respectively. Results from the workability test carried on the concrete paste showed that as the percentage replacement of OPC with the PPPA increases, the workability of concrete decreased however the setting time (initial and final) falls within the specified limits for OPC. The Flexural Strengths of the cast concrete beams were tested at 7, 14 and 28 days after curing in water. Results from the study shows an increase in the flexural strength from 10% replacement up to 20% replacement with PPPA; however, there was decrease in strength with increase content of PPPA above 20% replacement. This research work therefore recommends PPPA addition up to 20% as suitable replacement of cement in constructions and the use of PPPA concrete beams as load bearing beams in concrete structures.
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