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Durability of Hydrophobic Treatments on Concrete Surface

混凝土表面疏水处理的耐久性

基本信息

批准号：
169884052
负责人：
Professor Dr.-Ing. Michael Raupach
金额：
--
依托单位：
Lehrstuhl für Baustoffkunde und Institut für Bauforschung (ibac)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/169884052?language=en
关键词：
Durability Hydrophobic Treatments Concrete Surface

项目摘要

Hydrophobic agents have already been used by early civilisations suchas the Mayans to protect buildings from moisture and climaticinfluences. The advantage of hydrophobic agents compared to painting orsealing is that the former are colourless and do not form films. Thisresults in an almost unchanged appearance of the surface after theapplication, which is of enormous importance for béton brut andlandmarked façades. Current hydrophobic agents for inorganic substratessuch as concrete, structural and decorative dimension stones, andbricks consist of organosilicon compounds. Lacking detailed knowledgeon the durability of such substances, the potential for real-lifeapplications such as the protection of cultural heritage sites remainslargely unused. Consequently, this project is concerned with thesystematic investigation of potential degradation mechanisms ofhydrophobic agents and the results will be used to compile a model thatallows predicting their life-time. The model will contain relevantparameters such as the type of concrete, the type of hydrophobic agent,and climatic influences. This will form the basis for the developmentof new hydrophobic agents. In addition, the model can be used to opennew fields of applications for hydrophobic treatments that areinaccessible today due to a lack of knowledge the concerning long-termstability. The topic contains certain urgency, since a number ofconcrete façades in particular those of cultural heritage sites arecurrently refurbished using low quality methods. This will result inirreparable surface damages which could be prevents using suitablehydrophobic agents.

早期文明，如玛雅人，已经使用疏水剂来保护建筑物免受潮湿和气候的影响。疏水剂与涂漆或密封剂相比的优点是，前者是无色的，不形成薄膜。这导致在应用后的表面几乎不变的外观，这是非常重要的，对于<s:1> <s:1>海岬和地标性建筑。目前用于无机基材的疏水剂，如混凝土、结构和装饰尺寸的石头和砖，由有机硅化合物组成。由于缺乏对这些物质耐久性的详细了解，这些物质在现实生活中的应用潜力，如保护文化遗产遗址，在很大程度上仍未得到利用。因此，本项目将对疏水剂的潜在降解机制进行系统的研究，研究结果将用于编制预测其寿命的模型。该模型将包含相关参数，如混凝土类型、疏水剂类型和气候影响。这将为开发新的疏水剂奠定基础。此外，该模型可用于开辟疏水治疗的新应用领域，这些领域目前由于缺乏长期稳定性方面的知识而无法进入。这一主题具有一定的紧迫性，因为许多混凝土幕墙，特别是文化遗产地的幕墙，目前正在使用低质量的方法进行翻新。这将导致不可修复的表面损伤，这可能妨碍使用合适的疏水剂。