Title: Strength and durability of green concrete

Authors: A. Arun Kumar; A.S. Santhi; G. Mohan Ganesh

Addresses: School of Mechanical and Building Sciences, VIT University, Vellore – 632 014, India ' School of Mechanical and Building Sciences, VIT University, Vellore – 632 014, India ' School of Mechanical and Building Sciences, VIT University, Vellore – 632 014, India

Abstract: The waste and by-products from industries, thermal plants, and recycled materials have been used historically in cement, concrete and other constructional activities. By-products such as fly ash, bottom ash, silica fume, etc., gains its utilisation owing to their physical, chemical and engineering properties when used either by processing or directly on concrete. This paper was aimed in making concrete green and durable by utilisation of bottom ash as sand replacement material in concrete that can conserve river sand from exploitation and also prevents environmental pollution caused by bottom ash which is dumped in the form of slurry as ash ponds. Bottom ash is replaced for river sand for 30%, 60%, and 100% in concrete. The strength and durability of concrete was evaluated to find its potential application in concrete. Experimental results show that 30% bottom ash can beneficially be added to the concrete to produce 40-50 MPa without affecting the strength. The durability of bottom ash exhibited superior and better performance than reference concrete.

Keywords: green concrete; bottom ash; waste disposal; coal ash; compressive strength; splitting tensile strength; modulus of elasticity; durability; rapid chloride permeability; river sand conservation; environmental pollution; sand replacement material; slurry.

DOI: 10.1504/IJSTRUCTE.2015.067967

International Journal of Structural Engineering, 2015 Vol.6 No.1, pp.23 - 32

Received: 25 May 2013
Accepted: 16 Feb 2014
Published online: 12 Mar 2015 *

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