超高性能混凝土(UHPC)试验及应用研究

超高性能混凝土（UHPC）是一种力学性能超高、耐久性能优异、体积稳定性优良的新型水泥基复合材料，本文介绍了这种新型复合材料基本制备原理，介绍采用水泥、石英砂、矿物掺合料等常用建筑原材料配制出超高性能的混凝土，并通过对比试验，研究了矿物掺和料种类、纤维掺量以及养护工艺对超高性能混凝土抗压、抗折强度的影响，确定了最佳配合比。实验结果表明：此超高性能混凝土（UHPC）流动性好，在高温环境养护下，试件抗压强度达到325MPa，抗折强度达54MPa；在自然条件下养护，试件30天抗压强度为187MPa，抗折强度为35MPa。本文继而探索该种超高性能混凝土在预应力结构工程方面的应用，将其替代钢制锚垫板和其它产品，采用其制备出的预应力构件，各项性能指标均满足技术要求，并且成本显著降低，为超高性能混凝土在预应力结构工程方面的推广应用奠定基础。

Experimental and Applied Research on Ultra High Performance Concrete (UHPC)

Ultra High Performance Concrete (UHPC) is a new type of cement-based composite material with ultra-high mechanical properties, excellent durability, and excellent volume stability. This article introduces the basic preparation principle of this new composite material, and introduces the use of commonly used building raw materials such as cement, quartz sand, and mineral admixtures to prepare ultra-high performance concrete. Through comparative experiments, the types of mineral admixtures are studied The influence of fiber content and curing process on the compressive and flexural strength of ultra-high performance concrete has been determined to determine the optimal mix ratio. The experimental results show that this ultra-high performance concrete (UHPC) has good flowability. Under high temperature environment curing, the compressive strength of the specimen reaches 325MPa, and the flexural strength reaches 54MPa; Curing under natural conditions, the compressive strength of the specimen at 30 days is 187MPa, and the flexural strength is 35MPa. This paper then explores the application of this kind of ultra-high performance concrete in prestressed Structural engineering, replacing steel anchor plates and other products, and using the prestressed components prepared by it, all performance indicators meet the technical requirements, and the cost is significantly reduced, laying the foundation for the popularization and application of ultra-high performance concrete in prestressed Structural engineering