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首页> 外文期刊>Beton- und Stahlbetonbau >Application of UHPC as road bridge topping within the adaptation of an existing conventional bridge to an integral abutment bridge in Austria
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Application of UHPC as road bridge topping within the adaptation of an existing conventional bridge to an integral abutment bridge in Austria

机译：在奥地利将现有的常规桥改作整体式桥墩桥的过程中，UHPC在道路桥顶上的应用

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摘要

Ultra-high performance concrete (UHPC) has a high potential for the repair and retrofitting of existing reinforced concrete structures. A thin UHPC layer of a few centimeters can replace the waterproofing as well as the asphalt pavement and increase the load-carrying capacity. Due to its excellent durability properties, a longer service life of bridge decks made of UHPC can be expected. This paper presents the application of UHPC in the renovation of an existing reinforced concrete motorway bridge in Austria. The development of a UHPC with a compressive strength of 180 MPa, which enables a superstructure with a cross slope up to 4.5 % was necessary for this pilot project. In total, more than 40 m(3) UHPC were produced in a ready-mix concrete plant and cast on site. Within this project a successful transfer of laboratory findings into practical productions under on-site conditions was achieved.
机译：超高性能混凝土（UHPC）具有对现有钢筋混凝土结构进行修理和翻新的巨大潜力。几厘米的UHPC薄层可以代替防水层和沥青路面，并提高承载能力。由于其优异的耐用性，可以预期到由UHPC制成的桥面板的使用寿命更长。本文介绍了UHPC在奥地利现有的钢筋混凝土高速公路桥梁改造中的应用。对于该试点项目，必须开发抗压强度为180 MPa的UHPC，该结构可以使上部结构的横坡度达到4.5％。在预拌混凝土工厂中，总共生产了超过40 m（3）的UHPC，并现场浇铸。在该项目中，已成功地将实验室发现转化为现场条件下的实际产品。

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