resumo
The removal of graffiti causes irreversible deterioration of fair-faced concrete. The protective products are often selected without counting the properties of concrete surface leading to its insufficient protection. Chemical and micro-structural effects of anti-graffiti products on the concrete surface were analyzed in relation to its protection efficiency against graffiti, paints. Contact angles and wetting envelope graphs were examined, allowing the understanding and prediction of wetting behavior of concrete surfaces. The obtained results revealed the changes on the concrete surface produced by graffiti, graffiti protection and graffiti removal products, showing the advantage of permanent protection coating over sacrificial one. (C) 2015 Elsevier Ltd. All rights reserved.
palavras-chave
FREE-ENERGY
categoria
Construction & Building Technology; Engineering; Materials Science
autores
Neto, E; Magina, S; Camoes, A; Begonha, A; Evtuguin, DV; Cachim, P
nossos autores
Dmitry Evtyugin
Professor Associado com Agregação
Paulo Barreto Cachim
Professor Catedrático Convidado
Sandra Pereira Magina
Investigadoragradecimentos
Authors are grateful to CICECO - Institute of Materials (Portugal) for the financing of this work within the scope of the FCT (Portugal) grant PEst-C/QUI/UI0062/2013. Authors also wish to thank MSc Bruno Araujo de Almeida from CICECO for the technical assistance in SEM/EDS analyses. The authors wish to acknowledge all the support provided by the Construction Materials Laboratory of the University of Minho.