超高性能混凝土(UHPC) -在世界范围内的应用:最新进展

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摘要

超高性能混凝土(UHPC)作为一种新型掺合材料在建筑技术中的应用研究正在进行中。在过去的二十年中,UHPC的机械性能有了显著的改善,如强度、和易性和延展性,与普通混凝土相比,自浇筑性能、更高的密度和耐久性也有了进一步的改善。与普通混凝土相比,超高性能混凝土提供的最大优势之一是可以最大限度地减少结构元件的横截面尺寸。与传统混凝土相比,UHPC可用于提供显著的大跨度构件,同时也表现出较少的变化、徐变和干燥收缩。经过多年对UHPC性能的开发和研究,它已被用于商业应用,以满足对高质量建筑日益增长的需求。世界上许多项目开始将UHPC用于不同的建筑目标,如大跨度、柱、护套、雨幕覆层系统、面板系统、立面等。此外,文献中没有足够的资料描述混合物的设计、制备和固化。本研究概述了UHPC在结构和建筑应用中的应用。
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Ultra-High-Performance Concrete (UHPC) - Applications Worldwide: A State-of-the-Art Review
Research is in progress on the applications of ultra-high performance concrete (UHPC) as a new additive material in construction technology. Over the last twenty years’ significant improvements have been achieved in mechanical properties of UHPC, such as its strength, workability, and ductility, with further improvements made in self-placing properties, higher density, and durability compared with normal concrete. One of the biggest advantages offered by ultra-high performance concrete over normal concrete is the possibility to minimize the cross-sectional dimensions of the structural elements. UHPC can be used to provide significant long-span members, whilst also showing less variation, creep, and drying shrinkage compared to conventional concrete. After many years of development and research into UHPC’s properties, it is being used in commercial applications to meet the rising demand for quality constructions. Many projects in the world started using UHPC for different construction objectives such as long spans, columns, jacketing, rain-screen cladding systems, panel systems, façades, etc. Furthermore, there are not enough sources in the literature describing mixture design, preparation, and curing. This research gives an overview of the uses of UHPC in structural and architectural applications.
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