The application of UHPC on the monolithic part of the Štvanice footbridge

V. Davidová, Tomáš David, P. Reiterman, V. Šmilauer
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引用次数: 0

Abstract

The use of UHPC with fibers is becoming an increasingly common topic in the world. This material is used for its superior mechanical and physical properties and long service life. However, the production cost is high, hence UHPC is used for special applications or for smaller prefabricated parts. This paper focuses on UHPC application for the construction of the Štvanice Footbridge, Prague, the Czech Republic. A monolithic part of the structure was made of UHPC from fresh transport concrete, which was produced by Skanska Transbeton. The special feature is that about 126m3 of fresh concrete was industrially prepared. This concrete achieved the properties of SCC and the final 28 day compressive strength was 120MPa with tensile strength of 18.6 MPa. Due to high hydration heat release rate, an internal water cooling system was designed and sucessfully appled using water from Vltava River.
在什特瓦尼采(Štvanice)人行天桥的整体部分应用超高性能混凝土
在世界上,使用带纤维的超高性能混凝土正成为一个日益普遍的话题。这种材料具有优异的机械和物理性能,使用寿命长。然而,其生产成本较高,因此超高性能混凝土多用于特殊应用或较小的预制件。本文重点介绍了捷克共和国布拉格什特瓦尼斯人行天桥的超高性能混凝土应用情况。结构的整体部分由斯堪斯卡 Transbeton 公司生产的新拌混凝土制成。其特点是,约 126 立方米的新拌混凝土是工业化制备的。这种混凝土达到了 SCC 的性能,最终 28 天抗压强度为 120 兆帕,抗拉强度为 18.6 兆帕。由于水化热释放率很高,因此设计了一个内部水冷系统,并成功使用了伏尔塔瓦河水。
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