Ultra-High Performance Concrete with Compressive Strength Exceeding 150 MPa (22 ksi): A Simpler Way
Ultra-High Performance Concrete with Compressive Strength Exceeding 150 MPa (22 ksi): A Simpler Way
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DOI：
10.14359/51664215
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发表时间：
2011
影响因子：
1.7
通讯作者：
K. Wille;A. Naaman;G. Parra-Montesinos
中科院分区：
文献类型：
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作者：
K. Wille;A. Naaman;G. Parra-Montesinos
尽管在过去的20年里，人们对超高性能混凝土(UHPC)及其组成进行了深入的研究，但在没有特殊处理的情况下，几乎无法达到超过150兆帕(22KSI)的抗压强度，例如热养护、压力和/或广泛的振动。本文描述了一种抗压强度超过200兆帕(30ksi)的超高强度混凝土的开发，该材料使用美国市场上可以买到的材料，不使用任何热处理、压力或特殊混合器。评价了水泥类型、硅灰、砂和高效减水剂等不同变量对抗压强度的影响。试验结果表明，在流动台上通过坍落度锥试验测得的散布值是优化混合料堆积密度和抗压强度的一个良好而快速的指标。
Although intensive research related to ultra high-performance concrete (UHPC) and its composition has been conducted over the past 2 decades, attaining compressive strengths of over 150 MPa (22 ksi) without special treatment, such as heat curing, pressure, and/or extensive vibration, has been nearly out of reach. This paper describes the development of a UHPC with a compressive strength exceeding 200 MPa (30 ksi), obtained using materials commercially available in the U.S. market and without the use of any heat treatment, pressure, or special mixer. The influence of different variables such as type of cement, silica fume, sand, and high-range water reducer on compressive strength is evaluated. The test results show that the spread value, measured through a slump cone test on a flow table, is a good and quick indicator to optimize the mixture packing density and thus its compressive strength.