Rebar Corrosion and Sulfate Resistance of Blast‐Furnace Slag Cement
Publication: Journal of Materials in Civil Engineering
Volume 6, Issue 2
Abstract
This study was designed to evaluate the relative corrosion and sulfate resistance of concrete made with portland cements containing 2%–14% without and with 50%, 60%, 70%, and 80% cement replacement by blast‐furnace slag (BFS). The results show that BFS blended‐cement concretes had a significantly superior corrosion‐resistance performance. The best corrosion protection was obtained with 50% BFS cement, which, depending on the content of the parent cement, showed a 3.82‐3.16 times better performance in terms of corrosion‐initiation time compared to the parent plain‐cement concrete. BFS blending was specially beneficial in improving the corrosion‐resistance performance of Type V low cements. Performance on exposure to sodium‐sulfate (N) solution, replacement level only at 70% and above, showed sulfate resistance to be better than that of the Type V sulfate‐resistant cement. BFS blending, even with high cement (9%, 11%, and 14%) at 70% and above‐replacement level, imparted a high degree of sulfate resistance. The cement with high ratio has a perceptible adverse‐interactive effect and causes sulfate deterioration even with sulfate‐resistant cements. In M‐N environment, due to the magnesium‐gypsum type of attack, the 60% BFS cement deteriorated even more severely than the plain Type V and Type I cements.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 6 • Issue 2 • May 1994
Pages: 223 - 239
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: May 3, 1993
Published online: May 1, 1994
Published in print: May 1994
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