Performance of fly ash concrete with ferronickel slag fine aggregate against alkali-silica reaction and chloride diffusion

Journal Article · Fri Jan 15 04:00:00 EST 2021 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2020.106265· OSTI ID:23206189

Castel, Arnaud ^[1]; Kim, Taehwan ^[2]; Khan, Mohammad S.H. ^[3]

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1. School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007 (Australia)
2. Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052 (Australia)
3. School of Engineering, Design and Construction, Melbourne Polytechnic, Melbourne, VIC 3076 (Australia)

Ferronickel slag (FNS) is an industrial by-product of ferronickel alloy production at a high temperature which can be a promising potential to be used as fine aggregate to produce more sustainable concrete. In this study, the performance of concrete containing ferronickel slag sand and fly ash relating to alkali-silica reaction (ASR) and chloride contamination was investigated. ASR-induced expansion, chloride diffusion resistance, and chloride binding capacity of FNS concrete were determined through concrete prism tests (CPT), accelerated diffusion test, and bulk diffusion test. Thermogravimetric analysis (TGA) was conducted to measure the amount of Portlandite and Friedel's salt in concrete. Concrete with 50 wt% FNS sand as fine natural aggregate replacement and 25 wt% of cement replacement by fly ash showed a remarkable potential to be used not only as a low-carbon concrete with comparable mechanical properties to conventional concrete but also with a better performance against ASR and chloride contamination.

• OSTI ID: 23206189
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 139; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CEMENTS
CHLORIDES
COMPARATIVE EVALUATIONS
CONCRETES
CONTAMINATION
DIFFUSION
FLY ASH
HARDNESS
SERVICE LIFE
SILICA
TEMPERATURE RANGE 0400-1000 K
THERMAL GRAVIMETRIC ANALYSIS
WEAR RESISTANCE