Flexural behavior of ultra-high performance hybrid fiber reinforced concrete at the ambient and elevated temperature

被引：83

作者：

Li, Ye ^{[1
]}

Yang, En-Hua ^{[1
]}

Tan, Kang Hai ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 250卷

关键词：

Ultra-high performance fiber reinforced concrete (UHPFRC); Flexural behavior; Hybrid polyethylene-steel fiber; Aggregate size; Water-to-binder ratio; Elevated temperature; HIGH-STRENGTH CONCRETE; MECHANICAL-PROPERTIES; POLYPROPYLENE FIBERS; TENSILE BEHAVIOR; UHP-FRC; COMPOSITES; RESISTANCE; AGGREGATE;

D O I：

10.1016/j.conbuildmat.2020.118487

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigates the flexural performance of a hybrid polyethylene-steel fiber-reinforced ultrahigh performance concrete. Effects of different levels of fibers hybridization, aggregate size, water-to-binder ratio and exposed temperature on the load-deflection curves, toughness, and toughness index of UHPFRC are examined. Results indicate that a hybrid combination of polyethylene (PE) and steel fibers effectively enhanced limit of proportionality, modulus of rupture, toughness, and toughness index of UHPFRC. UHPFRC with 0.5 vol% PE and 2.0 vol% steel fibers in the current study shows the best flexural performance. Higher water-to-binder ratio and smaller aggregate reduce flexural performance of UHPFRC. Compared to polypropylene (PP) fibers, PE fibers have very limited effects on spalling prevention. Flexural performance of PE-steel hybrid UHPFRC is significantly reduced after exposure to elevated temperature. (C) 2020 Published by Elsevier Ltd.

引用

页数：11

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