Interface Bond Mechanism of EVA-Modified Mortar and Porcelain Tile
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 6
Abstract
Ethylene-vinyl acetate (EVA) redispersible powder was used to modify mortar. The tensile strength of EVA-modified mortar and the interface bond strength of EVA-modified mortar and porcelain tile, cured under and relative humidity , were tested. The interface bond mechanism of EVA-modified mortar and porcelain tile was discussed. Results obviously showed that EVA redispersible powder improved the tensile strength of mortar. The interface bond strength between EVA-modified mortar and porcelain tile increased with the increase of EVA content in mortar and did not always increase with the extension of curing age. Microstructure analysis illuminated that polymer film was being formed by EVA latex powder along the hydrated products and the mortar–porcelain tile interface. The EVA improved interface bond strength by penetrating the capillary and pore of porcelain tile accompanied with hydrated products.
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Acknowledgments
The authors would like to acknowledge that the project was supported by Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University (K201001), and the Key Projects in the National Science and Technology Pillar Program during the 11th 5-Year Plan Period (2006BAJ01A02, 2006BAJ05B03).
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© 2013 American Society of Civil Engineers.
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Received: Dec 20, 2011
Accepted: Jul 9, 2012
Published online: Aug 27, 2012
Published in print: Jun 1, 2013
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