Impact of Polysiloxanes of Various Chemical Structure on Water Vapour Permeability in Silicone Plasters Used in Building Renovation

Abstract:

Ready-to-use mortars based on organic binders are increasingly widely applied in renovation of historic buildings. Thispaper contains an analysis of the impact of silicone-organic polymers of various chemical structures, used for silicone plasters production, on water vapour permeability in the produced render. The results were obtained by means of experiments. The Sd value of cured render formed from plasters containing different quantities of the analysed silicone-organic polymers at a different quantity of organic resin was studied. Statistical methods based on Statistical methods based on multiple regression were used to describe the S_d value dependence on the change in contents of the analysed polymers. It was discovered that the changes in the contents of organic resin in the plaster formula have a greater impact on the coat water vapour permeability in the cured render than the changes in the contents of polysiloxanes. The intensity of polysiloxanes impact on the S_dvalue depends on their chemical structure, and on the kind of substituents related to the siloxane skeleton in particular.

• Periodical: Materials Science Forum (Volume 865)
• Pages: 211-218
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.865.211
• Online since: August 2016
• Authors: Wacław Brachaczek*, Łukasz Gradek, Ewa Sarna
• Keywords: Multiple Regression, Permeate Water Vapour, S_d Value, Silicone Render, Silicone Resin

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