View Item 

Corrosion Performance of Embedded Steel in Fly Ash Geopolymer Concrete by Impressed Voltage Method

Access Status
Fulltext not available
Authors
Olivia, Monita
Nikraz, Hamid
Date
2010
Type
Conference Paper

Metadata
Show full item record
Citation
Olivia, M. and Nikraz, H. 2010. Corrosion Performance of Embedded Steel in Fly Ash Geopolymer Concrete by Impressed Voltage Method, in Fragomeni, S. and Venkatesan, S. and Lam, N.T.K. and Sentuge, S. (ed), 21st Australian Conference on the Mechanics of Structures and Materials, Dec 7 2010, pp. 781-786. Melbourne, VIC: CRC Press/Baklema.
Source Title
Proceedings of the 21st Australian Conference on the Mechanics of Structures and Materials
Source Conference
21st Australian Conference on the Mechanics of Structures and Materials
ISBN
School
Department of Civil Engineering
URI
Collection
Abstract

The present paper covers a study of the corrosion performance of embedded steel in fly ash geopolymer concrete by an accelerated corrosion test set up. Concrete specimens were exposed to a constant impressed voltage of 5V and 30V. Two optimized fly ash geopolymer concrete mixtures were compared with a control mix (OPC concrete) at an equivalent strength grade. Alkalinity reduction by phenolphthalein spray, chloride penetration by AgNO3 spray and half cell potential measurement were also investigated. The accele-rated corrosion test was carried out for 28 days. Results indicate that the geopolymer concrete displayed a smaller recorded current and higher electrical resistance than the corresponding control mix. Small cracks were observed in the fly ash geopolymer samples. It can be concluded that the fly ash geopolymer concrete had good corrosion performance and yielded longer time to failure than the OPC concrete.