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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 8    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 8,August 2012
Experimental Study on Palm Kernel Shells as Coarse Aggregates in Concrete
Full Text(PDF, )  PP.273-278  
Author(s)
Daniel Yaw Osei, Emmanuel Nana Jackson
KEYWORDS
coarse aggregate, compressive strength, concrete, density, palm kernel shells, workability
ABSTRACT
This paper reports on experimental investigations on the effects of replacing crushed granite in concrete with palm kernel shells on the strength, density and workability of concrete. Two control mixes of ratios 1:2: 4 were batched by volume and by weight. Palm kernel shells were used to replace the crushed granite aggregate by volume and by weight respectively. The percentage replacement varied from 0% to I00% at intervals of 25%.The compaction factor test was used to assess the workability of the fresh concrete .The compressive strengths and densities of cured concrete cubes of sizes, 150mmx150mmx150mm were evaluated at 7days, 14days, 21days and 28days. Increase in the percentage replacement of granite lowered compressive strength, density and workability. Density on the average decreased at a rate of 7kgm-3 and 11kgm-3 per unit percentage increase in replacement for volume-batched concrete and weight-batched concrete respectively while compressive strength decreased at a rate of 0.11Nmm-2 and 0.22Nmm-2 per unit percentage increase in palm kernel shell content for volume-hatched concrete and weight-batched concrete respectively. There exists the possibility of replacing coarse aggregates with palm kernel shells in the production of structural concrete. The study identified possible cost reduction in replacing granite with palm kernel shells and recommended codification of the use of palm kernel shells as aggregates in concrete.
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