Mechanical and Durability Properties of Mortars Modified with Combined Polymer and Supplementary Cementitious Materials
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 9
Abstract
Repair and restoration work of reinforced-concrete (RC) structures is increasing because of the deterioration of aging infrastructures worldwide. Generally, plain mortar and polymer-modified mortar are widely used as repair materials for RC structures. In this study the effect of the combined use of polymers with supplementary cementitious materials (SCMs) on certain mechanical and durability properties (such as compressive and flexural strengths, water absorption, carbonation, and chloride penetration) of modified mortars is evaluated experimentally. The experimental program consists of two parts. In Part I, the effect of SCM slag and silica fume (SF) on the mechanical and durability properties of mortars is evaluated. On the basis of the best performance among different slag and SF contents, Part II of the experimental program is designed, in which the combined effect of polymers and slag/SF on the mechanical and durability properties of modified mortar is evaluated. Results show that the combined slag/SF and polymer-modified mortars (PMMs) exhibited better results than polymer-modified mortar alone. Between the combined polymers and SF/slag-modified mortars, the polymer-modified mortar containing 10% SF exhibited the highest compressive and flexural strengths and the lowest chloride penetration resistance compared to those containing 40% slag. Interestingly, the combined polymer and 40% slag-modified mortars exhibited better performance in water absorption and carbonation resistance than polymer-modified mortar containing 10% SF.
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Acknowledgments
The author would like to acknowledge the financial support provided by the Government of Japan by visiting research students from the College of Engineering of Nihon University, Koriyama, Japan. The author is also grateful to Professor Y. Ohama for his fruitful discussions with the author regarding the results of PMM during the course of the experiments reported in this study.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 9 • September 2011
Pages: 1311 - 1319
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 24, 2010
Accepted: Feb 28, 2011
Published online: Mar 4, 2011
Published in print: Sep 1, 2011
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