Properties of wet-mixed fiber reinforced shotcrete and fiber reinforced concrete with similar composition
Properties of wet-mixed fiber reinforced shotcrete and fiber reinforced concrete with similar composition
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DOI：
10.1016/j.cemconres.2004.05.033
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发表时间：
2005-04-01
影响因子：
11.4
通讯作者：
Lee, AYF
中科院分区：
文献类型：
--
作者：
Leung, CKY;Lai, R;Lee, AYF
纤维喷射混凝土（FRS）常用于边坡防护、隧道衬砌以及结构维修和修复。对于喷射混凝土配合比的设计，有必要了解纤维增强混凝土（FRC）的数据是否可用作初始指南。本研究将纤维增强混凝土的抗压强度、抗弯性能、渗透性能和收缩性能与相似组成的纤维增强混凝土进行了比较。基于五种不同混合物的结果表明，制造工艺（即，喷射混凝土与浇注）可显著影响抗压强度和渗透性，但对收缩行为的影响相对较小。在大多数情况下，FRS的抗弯强度略高于FRC，但开裂后的剩余承载力可能会显著降低。基于FRC和喷射混凝土性能的差异，讨论了其对材料设计的影响。(c)2004爱思唯尔有限公司保留所有权利。
Fiber reinforced shotcrete (FRS) is commonly used in slope protection, tunnel linings as well as structural repair and rehabilitation. For the design of shotcrete mixes, it is of interest to see if data on fiber reinforced concrete (FRC) can be employed as an initial guideline. In this study, various properties of FRS, including its compressive strength, flexural behavior, permeability and shrinkage behavior, are compared with FRC of similar composition. The results, based on five different mixes, indicate that the fabrication process (i.e., shotcreting vs. casting) can significantly affect compressive strength and permeability, but has relatively little effect on shrinkage behavior. The flexural strength of FRS is slightly higher than that for FRC in most cases, but the residual load carrying capacity in the postcracking regime can be significantly lower. Based on the differences in the properties of FRC and shotcrete, implications to material design are discussed. (c) 2004 Elsevier Ltd. All rights reserved.