SELF-CONSOLIDATING HIGH PERFORMANCE FIBER REINFORCED CONCRETE : SCHPFRC
SELF-CONSOLIDATING HIGH PERFORMANCE FIBER REINFORCED CONCRETE : SCHPFRC
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自密实高性能纤维增强混凝土：SCHPFRC
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发表时间：
2006
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影响因子：
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通讯作者：
A. Naaman
中科院分区：
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作者：
W. Liao;S. Chao;Sangyeol Park;A. Naaman
自固结高性能纤维增强混凝土（SCHPFRC）结合了自固结混凝土（SCC）的自固结特性和高性能纤维增强水泥复合材料（HPFRCC）的应变硬化和多次开裂特性（Naaman 1987，1996，2003）。SCHPFRC是一种高度流动的非离析混凝土，可以在典型的混凝土结构中铺展到位，填充模板并封装钢筋。这是美国地震工程模拟网络（NEES）项目的一部分，目的是开发一种SCHPFRC，可以很容易地制造和交付预拌卡车在工作现场使用，特别是在抗震结构中的应用。在本文中，作者根据对现有文献和大量实验室试验的广泛回顾，对研究结果进行了简要总结。从以前的研究中采取的几个SCHPFRC混合物进行了修改，使用当地可用的材料，导致推荐的混合物的抗压强度范围从35到65 MPa。这些混合物含有最大尺寸为12 mm的粗骨料和体积分数为1.5%和2%的30 mm长的钢纤维。通过调整粗骨料与细骨料的比例、增加膏体体积、按照预先设定的程序分步混合以及添加相关外加剂，实现了推荐的SCHPFRC混合料。传播直径的新鲜SCHPFRC混合物测量通过使用标准的坍落流动试验约为600 mm。从直接拉伸试验得到的结果表明，应变硬化反应的硬化复合材料保持到大的复合应变。
Self-consolidating high performance fiber reinforced concrete (SCHPFRC) combines the self-consolidating property of self-consolidating concrete (SCC) with the strain-hardening and multiple cracking characteristics of high performance fiber reinforced cement composites (HPFRCC) (Naaman 1987, 1996, 2003). SCHPFRC is a highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcing steel in typical concrete structures. It is being addressed as part of a project for the U.S. Network for Earthquake Engineering Simulation (NEES) with the objective to develop a SCHPFRC that can be easily manufactured and delivered by ready-mix trucks for use on the job site, with particular application in seismic resistant structures. In this paper, the authors provide a brief summary of findings based on an extensive review of existing literature and numerous laboratory trials. Several SCHPFRC mixtures taken from previous studies were modified using the available local materials, leading to recommended mixtures with compressive strengths ranging from 35 to 65 MPa. These mixtures contain coarse aggregates having a 12 mm maximum size and 30 mm long steel fibers in volume fractions of 1.5% and 2%. The recommended SCHPFRC mixtures were achieved by adjusting the coarse to fine aggregate ratios, increasing paste volume, mixing in steps according to a pre-set procedure, and adding relevant admixtures. Spread diameter of the fresh SCHPFRC mixtures measured by using the standard slump flow test was approximately 600 mm. Results obtained from direct tensile tests showed that the strainhardening response of the hardened composites were maintained up to large composite strains.
K.Kitayama、S.Otani、H.Aoyama：“RC 内部梁柱接头设计标准的制定”ACI 特别出版物（1991 年）。
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