A BRIEF STUDY ON THE STRENGTH PROPERTIES OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH WOOD ASH & NATURAL SAND WITH 100% CRUSHED STONE SAND

J.Geetanjali, C.M.Reethesh, A.Jyothi Swaroop, G.Vani

Abstract: Concrete is a construction material composed of portland cement and water combined with sand, gravel, crushed stone or other inert material like slag.Wood ash is a byproduct produced from the thermal power plants and many industries. It is causing many environmental problems. Several researches had been carried out to incorporate wood ash as a cement replacing material in the production of greener concentrate material and also as a sustainable means of disposable wood ash. Results of the researches have indicated that the wood ash can be effectively used as a cement replacement material for the production of the structural grade concrete of acceptable strength and durability properties. In this research initial, an attempt has been made to use wood ash as a replacement to cement in varying percentage sand natural sand is replaced with 100% crusher stone sand. The materials used in this work were powdered wood ash sourced locally from a bakery in Anathapuramu. The wood ash was passed through IS SIEVE 90 micron size. The study presents the behavior of wood ash replaced concrete. Analysis of wood ash, sieve analysis and specific gravity of wood ash and aggregate were conducted. A M20 grade mix concrete is proposed with mix proportions of 1:1.45:3.19 with water cement ratio of 0.50. Wood ash replacement is done in 0, 5, 10, 15, 20 and 25% to cement and in place of natural fine aggregate crushed stone sand has been used in the present study. 150×150×150 mm cubes and 150 mm diameter and 300mm height cylinders were cast and tested to determine the cube compressive strength and split tensile strength at 7 and 28 days curing periods respectively.Since wood ash indicates slightly pozzolanic, water demand increases as the ash content increases and the setting time of the paste increases as the ash content increases. It may be seen from this research initial that the optimum percentage replacement of cement by wood ash may be considered as 10%.

Keywords: Wood Ash, Pozzolan, Crushed Stone Sand

DOI: https://doi.org/10.15623/ijret.2017.0614001