Print Email Facebook Twitter Change in drying behaviour of two types of bricks after treatment with anti-graffiti and possible risks Title Change in drying behaviour of two types of bricks after treatment with anti-graffiti and possible risks Author Lubelli, B.A. van Hees, R.P.J. TNO Bouw en Ondergrond Publication year 2008 Abstract Anti-graffti coatings are often used to protect façades against unwanted graffiti. Despite the fact that anti-graffiti are widely used, their effect on the drying behaviour of materials is not well known. Product data sheets, as well as recommendations on their application, generally only consider their watcr vapour permeability without taking into account that the drying behaviour of a material is largely governed by liquid water transport. The paper reports a study carried out on six types of anti-graffiti coatings (permanent and sacrifìcial, water repellent and not) applied to two materials (fired-clay brick and calcium silicate brick). The effect of the anti-graffiti coatings on the drying behaviour of these materials was evaluated by means of drying tests performed at different RH. The obtained results are analysed as a function of product composition and the properties of the substrate materials, such as porosity and pore size distribution. The possible consequences of the application of the tested anti-grafhti coatings on common damage processes, such as frost and salt crystallization, are discussed. Subject Materials To reference this document use: http://resolver.tudelft.nl/uuid:cbf2fc98-2f76-46ac-abe7-a080e461e5df TNO identifier 331851 Source Restoration of Buildings and Monuments, 14 (5), 347-356 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.