A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydration process and microstructure development of integral water repellent cement based materials
Protection of cement based materials means above all, moisture protection because water is primarily responsible for inducing damaging physical and chemical processes in building materials. New and existing building surfaces need to be protected against liquid water penetration. In all cases, water repellents are applied either directly during the construction or insulation process; or as a post-treatment of the exposed surfaces in order to protect the buildings from further decay. A new way is to develop a bulk treatment for cement based materials which should provide a long term protection without modifying the mechanical properties of the materials. A fundamental study was initiated to investigate the influence of the incorporation of two active silicon-based agents (already used as postbuilding treatments) on the hydration processes of Portland cements and to understand the mechanisms involved. Three incorporation modes (pure liquids, oil in water emulsions and powders) are compared. The aim was to determine the best conditions for an efficient and sustainable treatment preserving the mechanical properties of the materials. The first results on capillary water absorption and mechanical tests on admixed mortars before ageing were obtained and are presented here.
Hydration process and microstructure development of integral water repellent cement based materials
Protection of cement based materials means above all, moisture protection because water is primarily responsible for inducing damaging physical and chemical processes in building materials. New and existing building surfaces need to be protected against liquid water penetration. In all cases, water repellents are applied either directly during the construction or insulation process; or as a post-treatment of the exposed surfaces in order to protect the buildings from further decay. A new way is to develop a bulk treatment for cement based materials which should provide a long term protection without modifying the mechanical properties of the materials. A fundamental study was initiated to investigate the influence of the incorporation of two active silicon-based agents (already used as postbuilding treatments) on the hydration processes of Portland cements and to understand the mechanisms involved. Three incorporation modes (pure liquids, oil in water emulsions and powders) are compared. The aim was to determine the best conditions for an efficient and sustainable treatment preserving the mechanical properties of the materials. The first results on capillary water absorption and mechanical tests on admixed mortars before ageing were obtained and are presented here.
Hydration process and microstructure development of integral water repellent cement based materials
Hydratisierung und Mikrostrukturausbildung von durchgängig wasserabstoßenden Werkstoffen auf Zementbasis
Spaeth, V. (author) / Delplancke-Ogletree, M.P. (author) / Lecomte, J.P. (author)
2008
10 Seiten, 4 Bilder, 12 Quellen
Conference paper
English
Polydimethylsiloxan , Hydroxylgruppe , Organosilan , Alkoxylgruppe , Alkyl , Hydratisieren , Betonmörtel , Mikrostruktur , wasserabstoßende Eigenschaft , Inkorporierung , Portlandzement , Einmischen , Flüssigkeit , Öl-in-Wasser-Emulsion , Pulver (Feinkorn) , Kapillarkondensation , mechanische Eigenschaft
Preparation and Characteristics of Integral Water Repellent Cement-Based Materials
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Preparation and Characteristics of Integral Water Repellent Cement-Based Materials
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