Sustainability of Palm Kernel Shell Ash (PKSA) as SCM in Self-Consolidating Concrete (SCC) Design
International Journal of Engineering Research and
This research work investigates the rheological (fresh) and hardened properties of self-consolidating concrete (SSC) with Palm Kernel Shell Ash (PKSA) as supplementary cementitious material (SCM). The experimental tests adopted for fresh properties of SCC in this research work, was mainly the Slump Flow test, L-box test, V-funnel test and T50 cm as per  standards. The mix design was iterative mix design method of five different proportioned mixes of 0%, 5%, 7.5%, 10% and 12.5% replacement of
... 2.5% replacement of cement with PKSA as SCM. The mixes were prepared in conformity with  specifications. A total of 45 cube samples (150mm x 150mm) and 15 cylindrical samples (150mm x 300mm) were used to examine the hardened properties of SCC experimentally. The cube samples were tested for Compressive strength at curing ages of 7, 28 and 56 days while the splitting tensile strength test was performed on the cylinder samples after a curing age of 28 days. The results of investigation revealed that all the fresh properties of PKSA blended SCC were within the obtainable standard in  and the compressive test results showed that 0% 0f PKSA produced 41.33N/mm 2 at 56 days, 5% produced 38.40N/mm 2 , 7.5% produced 36.71N/mm 2 , 10% produced 33.78N/mm 2 and 12.5% replacement of cement with PKSA produced 29.50N/mm 2 at 56days.The splitting tensile strength test gave strengths of 3.36, 3.18, 3.16, 3.01, and 2.68 N/mm 2 for 0%, 5%,7.5%, 10%, and the 12.5% levels of replacement of cement with PKSA respectively at 28days. From the results, it could be that SCC can be produced by substituting cement with PKSA up to12.5% without compromising the workability and the strength of the SSC produced.