Study of physico-mechanical properties of concretes based on palm kernel shells originating from the locality of Haut Nkam in Cameroon

Abstract

This study is based on the use of palm kernel shells as aggregate in the manufacture of concrete. Several (0, 25, 50, 75 and 100%) substitutions were used in the volume fraction of the aggregates. In order to evaluate the effect of this substitution, the mechanical properties at 7 and 28 days for compression was determine, 28 days for bending and then the physical properties of fresh and hardened concrete are carried out. The results show that 25% replacement of aggregate at 28 days have the compressive stress of the reference concrete (which is about 41 Mpa). At 100% replacement, the resistance becomes very low (about 5.37 Mpa). However with 50% replacement, a reduction of the weight of the concrete is important (around 2000 kg/m 3). It can at this level be classified as light weight concrete. Concerning the workability, between 25 and 50% of substitution allows obtaining the class 2 consistency, while between 75 and 100% in class 1, results corroborates the high rate of absorption of shells.