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Microstructure of lime pastes with addition of vegetable oil
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SYSNO ASEP 0505888 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Microstructure of lime pastes with addition of vegetable oil Author(s) Nunes, Cristiana Lara (UTAM-F) RID, ORCID, SAI
Viani, Alberto (UTAM-F) RID, ORCID, SAI
Mlsnová, Kateřina (UTAM-F)
Frankeová, Dita (UTAM-F) RID, SAI, ORCID
Mácová, Petra (UTAM-F) RID, SAI, ORCIDNumber of authors 5 Source Title 5th Historic Mortars Conference. Proceedings of the 5th Historic Mortars Conference. - Paris : RILEM Publications, 2019 / Álvarez J. I. ; Fernández J. M. ; Navarro Í. ; Durán A. ; Sirera R. - ISBN 978-2-35158-221-3 Pages s. 1112-1124 Number of pages 13 s. Publication form Online - E Action Historic mortars conference /5./ Event date 19.06.2019 - 21.06.2019 VEvent location Pamplona Country ES - Spain Event type WRD Language eng - English Country FR - France Keywords lime ; mortars ; vegetable oils Subject RIV AL - Art, Architecture, Cultural Heritage OECD category Materials engineering R&D Projects GA18-28142S GA ČR - Czech Science Foundation (CSF) Institutional support UTAM-F - RVO:68378297 Annotation Vegetable oils can be used as water-repellent additives for mortars and coatings for improving their durability when applied in the protection of structures exposed to severe weathering conditions involving water ingress. Previous studies have shown that, besides imparting water-repellence, vegetable oils can significantly affect the microstructure of the lime paste. The influence of the addition of different amounts (0.5 and 1.5 wt%) of linseed, stand, and rapeseed oil on the microstructure of lime pastes has been investigated with thermogravimetry, Fourier transform infrared spectroscopy, X-ray powder diffraction, and scanning electron microscopy, up to 180 days of age. The wettability of the pastes was analysed by measuring the contact angle of water drops on the pastes’ surface. The overal results indicate that linseed and rapeseed oil are more reactive with lime than stand oil, thus, affecting the microstructure of the paste more significantly. The lower reactivity of stand oil is assigned to the considerably lower amount of carbon-carbon double bonds as compared with the other oils. A higher amount of stand oil may be required to achieve water-repellence in the lime paste. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2020 Electronic address https://www.rilem.net/publication/publication/494
Number of the records: 1