IJE TRANSACTIONS A: Basics Vol. 31, No. 7 (July 2018) 1364-1372    Article in Press

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vishvanath N. Kanthe, S. Deo and M. Murmu
( Received: November 23, 2017 – Accepted: March 09, 2018 )

Abstract    This research paper describes the study of combined effect of Fly Ash (FA) and Rice Husk Ash (RHA) on properties of concrete as partial replacement of Ordinary Portland Cement (OPC). These by-products are having high pozzolanic reactivity. In this research, the composition of mix was used with 10% RHA along with 10, 20 and 30% FA as partial replacement of cement. The compressive workability, strength, durability performance, and microstructure of concrete were tested in the present study. The microstructures of the concrete sample were tested by Scanning Electron Microscope (SEM) and elemental contents by Energy Dispersive X-ray (EDX). The test results show that the highest compressive strength was achieved by 10%RHA and 20%FA used and beyond that, the strength was shown similar to control concrete mix (CM). The Ultrasonic Pulse Velocity (UPV) test result values were above the 4.5km/sec hence it may be considered as excellent concrete as per IS code for all mix. Response Surface Methodology (RSM) was adopted for optimizing the experimental data. Regression equation was yielded by the application of RSM relating response variables to input parameters. This method aids in predicting the experimental results accurately with an accepTABLE range of error. This type of concrete mix is very effective in enhancing the mechanical and durability properties of concrete by saving cement and cost. It also makes concrete sustainable as it reduces environmental problems.


Keywords    Rice Husk Ash, Fly Ash, Concrete, Compressive Strength, Workability, Durability.


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