Compatible Air Lime Mortars for Historical Tiled Facades: Bond and Mechanical Strength versus Tile–Mortar Interface Microstructure
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 6
Abstract
Exterior old glazed tiled facades have been a very important heritage testimony of Portuguese culture and traditions throughout the years. The adhesion of the mortars to the old tiles is a very important factor in the behavior of the tiled facades. This study performs a mechanical and water behavioral characterization of compatible air lime (AL) mortars with old substrates and tiles and a microstructural characterization of tile/mortar interface to evaluate the bond between the materials. Formulated lime mortars present mechanical strength values that provide compatibility. Compressive strength varies between 0.42 and 0.61 MPa in AL-based mortars and between 1.09 and 1.60 MPa in lime metakaolin (MK) mortars. evolution by EDS analysis provides indications on penetration of lime paste into ceramic biscuit. Higher values result in higher bond strength values.
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Acknowledgments
The authors acknowledge the FCT—Portuguese Foundation for Science and Technology for its support through the financial support of Ph.D. Scholarship: “Recovery of old tiled facades—Development of compatible mortars and study of adhesion phenomena to tiles” (SFRH/BD/88890/2012) and DB-HERITAGE project (PTDC/EPH-PAT/4684/2014). They also acknowledge the LNEC (National Laboratory for Civil Engineering) by the support to the PRESERVe project and ACRA (Ovar), Lusical and Lena Agregados for providing materials for testing.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Oct 20, 2018
Accepted: Sep 11, 2019
Published online: Mar 17, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 17, 2020
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