Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature

被引：206

作者：

Li, Ye ^{[1
]}

Tan, Kang Hai ^{[1
]}

Yang, En-Hua ^{[1
]}

机构：

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

来源：

CEMENT & CONCRETE COMPOSITES | 2019年 / 96卷

关键词：

Explosive spalling; Ultra-high performance concrete (UHPC); Permeability; Elevated temperature; HIGH-STRENGTH CONCRETE; INTERFACIAL TRANSITION ZONE; PORE PRESSURE; PERMEABILITY; BEHAVIOR; DIFFUSIVITY; HPC;

D O I：

10.1016/j.cemconcomp.2018.11.009

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigated synergetic effects of hybrid polypropylene (PP) and steel fibers on explosive spalling prevention of ultra-high performance concrete (UHPC) at elevated temperature. Permeability of UHPC was measured and correlated to the extent of spalling quantitatively. Microstructures of UHPC before and after elevated temperature exposure were examined to reveal potential mechanisms responsible for changes in permeability. Results showed that the use of hybrid PP and steel fibers completely prevented explosive spalling even at low fiber dosage of both fibers due to significant increase of permeability. Microstructural analysis revealed that such synergistic effect on increased permeability of hybrid PP and steel fiber-reinforced UHPC was attributed to enhanced connectivity of empty PP fiber tunnels by multiple microcracks generated from the thermal expansion of both fibers.

引用

页码：174 / 181

页数：8

共 39 条

[31] A review on ultra high performance concrete: Part II. Hydration, microstructure and properties [J].

Wang, Dehui ;

Shi, Caijun ;

Wu, Zemei ;

Xiao, Jianfan ;

Huang, Zhengyu ;

Fang, Zhi .

CONSTRUCTION AND BUILDING MATERIALS, 2015, 96 :368-377

[32] Application of nanoindentation testing to study of the interfacial transition zone in steel fiber reinforced mortar [J].

Wang, Xiao Hui ;

Jacobsen, Stefan ;

He, Jian Ying ;

Zhang, Zhi Liang ;

Lee, Siaw Foon ;

Lein, Hilde Lea .

CEMENT AND CONCRETE RESEARCH, 2009, 39 (08) :701-715

[33]

Weise F., 2017, INFLUENCE PRETREATME

[34]

Wille K., 2011, MATER STRUCT, V45, P309

[35] Influence of the interfacial transition zone and microcracking on the diffusivity, permeability and sorptivity of cement-based materials after drying [J].

Wong, H. S. ;

Zobel, M. ;

Buenfeld, N. R. ;

Zimmerman, R. W. .

MAGAZINE OF CONCRETE RESEARCH, 2009, 61 (08) :571-589

[36] Influence of steel and/or polypropylene fibres on the behaviour of concrete at high temperature: Spalling, transfer and mechanical properties [J].

Yermak, N. ;

Pliya, P. ;

Beaucour, A. -L. ;

Simon, A. ;

Noumowe, A. .

CONSTRUCTION AND BUILDING MATERIALS, 2017, 132 :240-250

[37] Nonlinear finite element analysis of ultra-high-performance fiber-reinforced concrete beams [J].

Yoo, Doo-Yeol ;

Kang, Su-Tae ;

Banthia, Nemkumar ;

Yoon, Young-Soo .

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, 2017, 26 (05) :735-757

[38] How do polypropylene fibers improve the spalling behavior of in-situ concrete? [J].

Zeiml, M ;

Leithner, D ;

Lackner, R ;

Mang, HA .

CEMENT AND CONCRETE RESEARCH, 2006, 36 (05) :929-942

[39] Identification of residual gas-transport properties of concrete subjected to high temperatures [J].

Zeiml, Matthias ;

Lackner, Roman ;

Leithner, David ;

Eberhardsteiner, Josef .

CEMENT AND CONCRETE RESEARCH, 2008, 38 (05) :699-716

← 1 2 3 4 →