Composite UHPC facade elements with functional surfaces

Composite UHPC facade elements with functional surfaces
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具有功能表面的复合 UHPC 立面元件

DOI：
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发表时间：
2016
期刊：
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通讯作者：
Christer Cederqvist
Christer Cederqvist
中科院分区：
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文献类型：
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作者：
P. Fontana;L. Miccoli;Ricardo Kocadag;N. Silva;D. Qvaesching;O. Kreft;Christer Cederqvist

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本文提出了一种创新的方法，将外部超高性能混凝土（UHPC）支撑层与蒸压加气混凝土（AAC）或蜂窝轻质混凝土（CLC）的隔热层相结合，以创建轻质立面元件，其在功能和能源效率方面得到了改善。通过开发具有自清洁性能的UHPC，提高了立面构件的耐久性。一种方法是基于外部UHPC壳的光催化活化，通过掺入二氧化钛颗粒。第二种方法包括通过微结构化对UHPC表面进行改性，并结合应用防水剂以产生持久的超疏水性。目前的实验室测试结果是有希望的，并证明了方法的可行性。
This paper presents an innovative way to combine an external ultra-high performance concrete (UHPC) supporting layer with an insulation layer of autoclaved aerated concrete (AAC) or cellular lightweight concrete (CLC) to create light-weight facade elements, which are improved in functionality and in energy efficiency. The durability of the facade elements is improved by developing UHPC with self-cleaning properties. One approach is based on the photocatalytic activation of the external UHPC shell by incorporation of TiO2 particles. The second approach consists of the modification of the UHPC surface by micro structuring in combination with the application of water-repellent agents to create durable super hydrophobicity. The current results obtained from laboratory testing are promising and demonstrate the feasibility of the approaches.