Durability characteristics of concrete using ferronickel slag fine aggregate and fly ash
MetadataShow full item record
Copyright © ICE Publishing, all rights reserved
The production process of ferronickel generates an enormous amount of slag (FNS) as a by-product, which has potential for use as a fine aggregate in concrete. However, information regarding the durability of FNS aggregate concrete is very limited in the literature. This study evaluates the durability characteristics of concrete using FNS as up to 100% replacement of natural sand and fly ash as 30% replacement of cement. The volume of permeable voids (VPV) of concrete was found to increase with the increase of FNS aggregate. As a result, sorptivity and chloride permeability showed increasing trends with the increase of FNS aggregate. However, the pozzolanic reaction of fly ash reduced the porosity of the concrete, as evidenced by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The specimens with FNS aggregate and fly ash were classified as 'excellent' in terms of VPV, 'low' in terms of chloride permeability and 'good' in terms of sorptivity. The use of fly ash also reduced the strength losses of FNS aggregate concrete subjected to alternate wet-dry cycles. Overall, a durability equivalent to that of conventional concrete could be achieved when FNS was used as a partial replacement of sand together with fly ash as a partial replacement of cement.
Showing items related by title, author, creator and subject.
Soltaninaveh, Kaveh (2008)Concrete is the most common building material in the world and its use has been increasing during the last century as the need for construction projects has escalated. Traditionally, concrete uses Ordinary Portland Cement ...
Shaikh, Faiz; Nguyen, H. (2013)The incorporation of mixed construction and demolition (C&D) wastes as a substitute to natural aggregates (NA) has many economic and environmental benefits. In this paper, the results of an investigation on the effect of ...
Saha, A.; Sarker, Prabir (2017)Abstract: Molten ferronickel slag (FNS) is a by-product of the production process of ferronickel alloy. The granulated FNS is broadly supplied by the producers for using it as an alternative fine aggregate in concrete. ...