沙子细度对超高性能混凝土
性能的影响
摘要
随着如今高效减水剂的不断发明与应用、矿物细粉的回收与利用、纤维材料的出现以及新型水泥基材料的发展，超高性能混凝土也随之出现，简称UHPC。相对比较传统的混凝土，UHPC具有很多的优点，如：强度更高、能自密实、抗腐蚀性能好、韧性高等，这就使得其能适应各种极端的自然环境。在如今这样一个高速发展的社会也就更加需求这样的超高性能混凝土。因此本文主要介绍了UHPC的研究背景和现状以及研究的意义；UHPC的配合比设计方法及制作工艺；还着重介绍的不同沙子细度对UHPC的微观结构和力学性能（如：抗压强度、劈裂抗拉强度、抗弯强度、弹性模量）的影响，从而发现最优的方案使得超高性能混凝土的性能能够达到最优，为以后的UHPC配合比设计提供实验基础。
关键词：UHPC；力学性能；配合比；沙子细度
Abstract
With the invention and application of todays high efficiency water reducing agent, recycling and utilization of mineral powder, the emergence of the fiber and the development of new cement base material, high performance concrete also emerged, hereinafter referred to as UHPC.Relatively traditional concrete, UHPC has many advantages, such as: higher strength, can self-compacting, good corrosion resistance, high toughness, which makes it can adapt to all kinds of extreme natural environment.In todays fast-growing society, there is more demand for such super-high performance concrete.Therefore, this paper mainly introduces the research background and current situation of UHPC and its significance.The design method and production process of UHPC.Also introduced the different sand fineness of UHPC microstructure and mechanical properties (such as compressive strength, splitting tensile strength, bending strength, elastic modulus), to find the optimal solution to achieve the optimal performance of high performance concrete can, mixture ratio design of UHPC provide experimental basis for later.
Key words：UHPC；Mechanical properties; Mixture ratio; The fineness of the sand
引言
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