INFLUENCE OF BAMBOO LEAF ASH (BLA) AND COCONUT FIBRE ASH (CFA) ON THE STRENGTH PROPERTIES OF CONCRETE

Abstract

Concrete is being widely used in all infrastructures and its material is mainly very expensive forthe construction. The Bamboo sticks are unutilized in the concrete work and hence their usagemay help to decrease the cost of construction. The use of waste materials in concrete productionis becoming worldwide practice. The assessment of the activity of cement materials is becomingincreasingly important because of the need for more sustainable cementing product. The earlywork has been carried out with the partial replacement of bamboo leaf ash and coconut fibre ashwith concrete in order to increase the tensile strength of concrete and compressive strength hasbeen decreased. Now we are doing substitution of bamboo leaf ash and coconut fibre ash withconcrete to know if there will be an increase or decrease in the compressive strength of concrete.The use of bamboo leaf ash and coconut fibre ash as a substitute for cement is used in concrete inorder to know the compressive strength. Compressive strength of 28 days curing with substituteof BLA to cement gives 20.25N/mm2 at 2.5% of ash substitute and it is observed that thestrength is decreased than conventional concrete. Compressive strength of 28 days curing withsubstitute of BLA to cement gives 16.77N/mm2 at 10% of ash substitute and it is observed thatthe strength is decreased than conventional concrete. Compressive strength of 28 days curingwith substitute of CFA to cement gives 20.01N/mm2 at 2.5% of ash substitute and it is observedthat the strength is decreased than conventional concrete. Compressive strength of 28 days curingwith substitute of CFA to cement gives 18.60N/mm2 at 10% of ash substitute and it is observedthat the strength is decreased than conventional concrete. The substitution is done with thefollowing percentages of 0%, 2.5%, 5%, 7.5% and 10% with bamboo leaf ash and coconut fibreash separately. Thus, from the results obtained, it can be concluded that the use of BLA and CFAas a supplementary for cement decreases its strength.