The Effect of Palm Shell as Coarse Aggregate Replacement on Self Compacting Concrete with Different Curing Methods

Abstract

A type of concrete that has ability to compact itself without the aid of a vibrator or human labor known as Self-Compacting Concrete (SCC). This concrete is suitable for work on concrete structures need great effort to be compacted manually. The aim of this research is to study about the effect of replacing coarse aggregate using palm kernel shell waste. The variation of the shells used were 40%; 50% and 60% of the coarse aggregate volume. The utilization of palm shell waste was expected to reduce the use of natural resources as the primary material for concrete and utilize waste optimally. The tests consist of fresh and hardened properties. Fresh properties test was one of the mandatory requirements that must be perform on self-compacting concrete. There are several fresh properties test consisted of slump flow, T-50, J-Ring, V-Funnel and L-Box. Meanwhile, the hardened properties test was carried out in compressive strength and splitting tensile strength. Hardened properties testing was performed when the specimens were 3, 7, 28 and 56 days old. The curing process is carried out until the concrete was seven days old with a method consisting of sealed curing, moist curing, water curing, air curing and oven curing. The highest compressive strength and tensile strength for sealed curing, oven curing, moist curing and air curing methods were found in the palm shell variation of 60%, while in the water curing method the highest compressive strength was in the palm shell with a variation of 40% and the highest tensile strength was in the palm shell with 0% variation.