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Mechanical properties of ultra-high-performance fiber-reinforced concrete: A review

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A comprehensive investigation into the mechanical properties of ultra-high-performance fiber-reinforced concrete (UHPFRC), considering various influential factors, is imperative in order to obtain fundamental information for its practical utilization. Therefore, this paper reviewed the early-age strength (or setting) development and mechanical properties of hardened UHPFRC. In connection with the latter, the effects of the curing conditions, coarse aggregate, mineral admixtures, fiber properties, specimen size, and strain-rate on the mechanical performance of UHPFRC were specifically investigated. It was obvious that (1) heat treatment accelerates the hydration process, leading to higher strength; (2) a portion of the silica fume can be replaced by fly ash, slag, and rice husk ash in mechanical perspective; (3) the use of deformed (hooked and twisted) or long straight steel fibers improves the mechanical properties at a static rate; and (4) high rate loading provides a noticeable increase in the mechanical properties. Alternatively, there are some disagreements between the results from various 'size effect' tests and the effectiveness of using twisted steel fibers at static and high rate loadings. Further research to reduce the production cost of UHPFRC is also addressed in an attempt to make its widespread use more practical. (C) 2016 Elsevier Ltd. All rights reserved.This research was supported by a grant (16TBIP-C111710-01) from Technology Business Innovation Program funded by Ministry of Land, Infrastructure and Transport of Korean government. Continued support of IC-IMPACTS (Canada India Research Center of Excellence) is also appreciated

Topics: Ultra-high-performance fiber-reinforced concrete, Mechanical property, Curing condition, Steel fiber property, Size effect, Strain-rate
Year: 2016
DOI identifier: 10.1016/j.cemconcomp.2016.08.001
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Provided by: HANYANG Repository
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