BibTeX:

@article{IJIRSTV1I12114,
     title={Study on Strength Characteristics of Concrete with Partial Replacement of Cement by Fly Ash and Coarse Aggregate by Coconut Shell},
     author={Md Taqiuddin, Nikita Munigal, Imtiyaaz Ahmed, Sharnappa and Prof. S.N Munnur},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={12},
     pages={417--425},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I12114.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

The rising cost of construction material is a matter of concern. The reason for increase in cost is high demand of concrete and scarcity of raw material. Hence the concrete technologists must search for some economical alternative to the coarse aggregate. In this study M 30 grade of concrete was produced by partially replacing cement by flyash and coarse aggregate by coconut shell. Conventional concrete with normal aggregate and coconut shell concrete with 10 - 40% coarse aggregate replacement with CS were made and properties like compressive strength, and split tensile strength were investigated. Cubes of size 150mmX150mmX150mm to check the compressive strength and cylinders of 150mm dia and 300mm length were casted. All the specimens were cured for the period of 7, 14 and 28 days before crushing. The compressive strength of coconut shell concrete for 10%, 20%, 30% and 40% obtained for 28 days are 35.72 N/mm2, 33.71 N/mm2, 29.91 N/mm2 and 25.21 N/mm2 respectively and the corresponding split tensile strength are 3.65 N/mm2 , 3.46 N/mm2, 3.12 N/mm2, and 2.88 N/mm2 respectively. Results indicated that there is moderate decrease in compressive strength for 10% 20% and 30% replacement i,e 5.67% ,10.93% 23.05%, corresponding decrease in split tensile strength 6.16% 11.05% and 19.97% respectively. The results of the study showed that concrete produced by replacing 10% to 20% of coarse aggregate by coconut shells can be used in reinforced concrete construction and 30% to 40% replacement can be in structural lightweight concrete (ASTM C330, 1999). A potential exists for the use of coconut shells as replacement of conventional aggregate in both conventional reinforced concrete and lightweight reinforced concrete construction. The use of coconut shells as partial replacement for conventional aggregates should be encouraged as an environmental protection and construction cost reduction measure.

Cement, flyash , Sand ,coarse aggregate and coconut shell