THE EFFECT OF PARTIAL REPLACEMENT OF CEMENT WITH GROUND AND UNGROUND SUGARCANE BAGASSE ASH (SCBA) ON MECHANICAL PROPERTIES OF CONCRETE

Abstract

There has been an increase in infrastructural works in this century, especially in developing countries in line with realization of the Millennium goals. This has led to an increase in demand and consumption of cement since it is the major constituent of concrete. In the early 20th century, the composition of concrete was primarily cement, water and aggregates [02]. With time and use of technology, the scientists discovered the benefits that came with use of admixtures in the concrete production. This research paper focuses on how sugarcane bagasse ash (SCBA) can be used to replace cement partially in order to improve the performance of concrete. In this paper, SCBA was ground in a ball mill for 60 minutes and 30 minutes and its physical and chemical properties determined to establish if it was pozzolanic. 0%, 10%, and 20% by weight of cement was then replaced by the ash in concrete and the workability and physical properties of concrete determined. The grinding was very effective as illustrated by the particle distribution curve in this report. The specific gravity values increased with the grinding and the SCBA was found to be highly pozzolanic. The workability is improved with grinding as well as with increase in the amount of SCBA up to 10% replacement. Density was increased with grinding and increase in number of days of curing. The compressive strength and tensile strength also increased as the amount of SCBA was increased, as days of curing increased, with 10% replacement giving concrete with the highest strength. Lastly, water absorption reduced with grinding and increase in number of days of curing. 60 minutes ground SCBA with 10% replacement of cement gave concrete with the best performance in terms of workability and physical properties. 

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