Acid and Sulfate Resistance of Alkali-Activated Ternary Blended Composite Binder
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 2
Abstract
The aim of the study is to evaluate both acid and sulfate resistance of alkali-activated binders (AABs): (1) AAB-1 made up of slag, palm oil fuel ash, and rice husk ash alongside a 2.5 M NaOH solution; and (2) AAB-2 with the same binders except for palm oil fuel ash, which was replaced by fly ash. Acid and sulfate resistance of mortar specimens were evaluated by visual observation, weight change, compressive strength change, and microstructure analysis. AABs mortar specimens showed superior test results in terms of weight loss and compressive strength reduction compared with an ordinary mortar when immersed in 3% and 3% HCl solutions for 270 days. On the other hand, the AAB-1 mortar specimen showed a better sulfate resistance than those of AAB-2 and an ordinary mortar when immersed in 5% and 5% solutions for 270 days. The microstructure analysis revealed a significant residual gel structure in case of AABs mortar specimens compared with an ordinary mortar specimen after 270 days in both acid and sulfate media.
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Acknowledgments
The authors acknowledge their ample gratitude and pleasure to Almighty Allah (swt) for being able to write this article. Particularly, the authors would like to appreciate highly the administration of University Kebangsaan Malaysia (UKM) for providing financial supports; Ministry of Science, Technology and Innovation Malaysia; Fundamental Research Grant Scheme (FRGS/1/2013/TK06/UKM/01/1); and Department of Civil and Structural Engineering of UKM for conducting this research work.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 2 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 9, 2016
Accepted: Jul 10, 2017
Published online: Nov 29, 2017
Published in print: Feb 1, 2018
Discussion open until: Apr 29, 2018
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