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Fresh and Early-Age Properties of Cement Pastes and Mortars Blended with Nickel Slag

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Authors
Rahman, M.A.
Sarker, Prabir
Shaikh, Faiz
Date
2015
Type
Conference Paper

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Rahman, M.A. and Sarker, P. and Shaikh, F. 2015. Fresh and Early-Age Properties of Cement Pastes and Mortars Blended with Nickel Slag, in J. Sanjayan and K. Sago-Crentsil (ed), 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, Aug 30 2015. Melbourne, Australia: Concrete Institute of Australia.
Source Title
Construction Innovations, Research into Practice
Source Conference
27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week
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Department of Civil Engineering
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Abstract

Usage of industrial by-product materials in concrete is increasing because this is a sustainable way to manage the by-products and convert them into economic values. This paper presents the properties of fresh and hardened cement pastes and mortars blended with a proprietary nickel slag. Water demand slightly reduced with the increase of the slag content in determination of normal consistency. Incorporation of the slag with cement slightly prolonged initial and final setting time. The Le-Chatelier soundness test results did not show any increase in expansion for cement replacement of up to 65% by the slag though it has high magnesium content. The strength activity index of the slag was found to be 84% at 28 days when 20% of cement was replaced by the slag. Cement was replaced by the slag at rates of 20-50% in mortar mixtures having water to binder ratio of 0.5. Results show that 30% and 50% replacement of cement by the slag provided about 83% and 66% compressive strength respectively compared to that of 100% cement mortar specimens.