STUDY ON THE USE OF PALM KERNEL SHELL AND PERIWINKLE SHELL AS COARSE AGGREGATES IN CONCRETE
International Journal of Engineering Applied Sciences and Technology
This study investigates the performance of palm kernel shells (PKS) and periwinkle shells (PS) as coarse aggregates in concrete. A total of 80 cubes and 80 cylinders were produced in a laboratory. Forty cubes and 40 cylinders were produced with replacement materials for granite (i.e. Palm Kernel Shells and Periwinkle Shells). The replacement was done from 0% to 100% in steps of 25% (i.e. 0%, 25%, 50%, 75%, 100%). The strength of the concrete cubes and cylinders were measured in 7, 14, 21 and
... in 7, 14, 21 and 28-days, using single batch mix of 1:2:4 (i.e. cement, sand, coarse aggregate) and 0.6 water/cement ratio. Slump test (workability), compressive strength test and split cylinder test were conducted. The results showed that, compressive and tensile strengths decrease as PKS and PS content increases, which allow specific area to increase, thus requiring more cement paste to bond effectively with the shells. The result also revealed that for all curing ages, palm kernel shell concrete (PKSC) have lower compressive strength and tensile strength than periwinkle shell concrete (PSC). The compressive strength and tensile strength of the 28-day PKSC with 100% replacement were 4.33 N/mm 2 , 3.68 N/mm 2 , respectively; that of PSC at 100% replacement were 5.89 N/mm 2 , 4.95 N/mm 2 , respectively; and granite concrete without any replacement were 25.11 N/mm 2 , 11.74 N/mm 2 , respectively. It is concluded that both PKSC and PSC satisfied the compressive strength and tensile strength requirement of light weight concrete, although PS has better gradation and bonding to cement than PKS. This implies that PS is best suited as replacement for granite in concrete than PKS. It is recommended that the mix-ratio should be altered to get higher values of compressive strength.