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Reinforcement Mechanism of Orientally Distributed Steel Fibers on Ultra-high-performance Concrete by Hongxiang Gou; Hongbo Zhu; Haiyun Zhou; Zhenghong Yang is a Engineering article available to read on EtoBox.

What is Reinforcement Mechanism of Orientally Distributed Steel Fibers on Ultra-high-performance Concrete about?

A novel device and method were designed to orientally distribute thin and short steel fibers in ultra-high-performance concrete (UHPC). With the different volume fractions of steel fibers, the mechanical properties of UHPC with orientally distributed steel fibers (group D) and disorderly distributed steel fibers (group L) were compared and analyzed. The fiber orientation coefficient ( η θ ) by means of image processing and the theoretical prediction model of flexural-tensile strength based on composite and bending moment theories were studied. The multiscale image analysis of the fracture surface was applied to reveal the enhancement mechanism. The results demonstrate that the mechanical properties such as flexural strength, flexural-tensile strength, flexural toughness, and interfacial bonding strength of UHPC in group D are significantly promoted, in contrast to those in group L. The average η θ of 0.85 in group D indicates that this experimental method can substantially improve the arrangement of steel fibers, hereby the efficiency is improved. Besides, the proposed prediction model of flexural-tensile strength based on the composite and bending moment theories, showing a good a

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Author

Hongxiang Gou; Hongbo Zhu; Haiyun Zhou; Zhenghong Yang

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)