Saraswathy, V. and Muralidharan, S. and Thangavel, K. and Srinivasan, S. (2003) Influence of activated fly ash on corrosion-resistance and strength of concrete. Cement & Concrete Composites, 25. pp. 673-680. ISSN 0958-9465

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Abstract

Various activation techniques, such as physical, thermal and chemical were adopted. By adopting these methods of activation, hydration of fly ash blended cement was accelerated and thereby improved the corrosion-resistance and strength of concrete. Concrete specimens prepared with 10%, 20%, 30% and 40% of activated fly ash replacement levels were evaluated for their compressive strength at 7, 14, 28 and 90days and the results were compared with ordinary Portland cement concrete (without fly ash). Corrosion-resistance of fly ash cement concrete was studied by using anodic polarization technique. Electrical resistivity and ultrasonic pulse velocity measurements were also carried out to understand the quality of concrete. The final evaluation was done by qualitative and quantitative estimation of corrosion for different systems. All the studies confirmed that upto a critical level of 20– 30% replacement; activated fly ash cement improved both the corrosion-resistance and strength of concrete. Chemical activation of fly ash yielded better results than the other methods of activation investigated in this study.

Item Type:	Article
Uncontrolled Keywords:	Reinforcement corrosion; Fly ash cements; Activated fly ash; Electrical resistivity; Ultrasonic pulse velocity
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	24 Mar 2012 06:28
Last Modified:	24 Mar 2012 06:28
URI:	http://cecri.csircentral.net/id/eprint/865

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