The Effect of Strength and Characteristics of Concrete Using Crushed Waste Coconut Shell as Partial Replacement for Coarse Aggregate
1Sadiq A., 1Suberu J., and 3Babatunde A. Obende
1Department of Civil Engineering, The Federal Polytechnic Ado-Ekiti State. Nigeria
3Department of Civil Engineering, Afe Babalola University Ado-Ekiti State. Nigeria
Email: callraheem78@gmail.com; Corresponding author: 1Sadiq A
ABSTRACT
This study presents a description of evaluating the effects of strength characteristics of concrete produced using crushed waste Coconut shell as a substitute for conventional Coarse aggregate. The comparisons were made by replacing conventional coarse aggregates at 0%, 2.5%, 4.5%, 6.5%, 8.5% and 10% by weight of coconut shell. Mix design of 1:2:4 and water-cement ratio of 0.50 were used to produce concrete specimen of cubes size 150mm3 and cylinder sizes 100mm x 200mm. A total of 48 concrete specimens were
casted and wholly submerged in water to cure for the intervals of 7 and 28 days after which their average compressive strengths and split tensile strength were determined. The workability established was increasing with increase in the percentage replacement of crushed granite with coconut shell aggregates. Concrete mixtures were tested and compared in terms of compressive strength of the conventional concrete at 28days. Thus,
2.5%, 4.5% and 6.5% of Coconut shell content has upright performances at the replacement, making both technically, economically feasible and conformed with design mix grade M-15 of Concrete and the Split tensile strength results range at 2.10N/mm2 to 1.32N/mm2. On further replacement, decrease in the strength of Coconut Concrete has
been observed. The study result shows that Coconut Concrete can be used as substitute of aggregates and well as light weight concrete which will not only cost effective and eco-friendly but decreases the problem of discarding of waste materials and also help to resolve the problem of scarcity of conventional material such as Coarse aggregate. Keywords: Strength, Physical properties, Workability, Coconut shell and Aggregates.
