Fibre pullout behaviour of fibre-reinforced UHPC with TPE-coated fibres

被引：6

作者：

Schleiting, Maximilian ^{[1
]}

Klier, Kevin ^{[2
]}

Wiemer, Niels ^{[1
]}

Wetzel, Alexander ^{[1
]}

Zarges, Jan-Christoph ^{[2
]}

Heim, Hans-Peter ^{[2
]}

Middendorf, Bernhard ^{[1
]}

机构：

[1] Univ Kassel, Dept Struct Mat & Construction Chem, D-34125 Kassel, Germany

[2] Univ Kassel, Inst Mat Engn Polymer Engn, D-34125 Kassel, Germany

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 376卷

关键词：

High-performance concrete; Fiber reinforcement; Bond strength; Bending strength; Polymers; HIGH PERFORMANCE CONCRETE; MECHANICAL-PROPERTIES; STEEL FIBERS; POLYPROPYLENE; COMPOSITE;

D O I：

10.1016/j.conbuildmat.2023.131043

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The use of micro fibres as reinforcement in Ultra-High Performance Concrete (UHPC) enhances its mechanical properties, especially the flexural and tensile strengths and a ductile post-failure behaviour is achieved. To guarantee this positive influence, an optimal bonding between fibre and cementitious matrix is necessary. To achieve this, a coating of fibres with a thermoplastic elastomer is proposed in this study. Pullout tests with brass coated steel and stainless steel fibres with and without a TPE-coating (thermoplastic elastomer) were carried out as well as flexural strength tests of UHPC reinforced with the same fibres. For better comparability between pullout and flexural strength tests, a modified pullout setup, allowing inclined fibre pullout, was developed and used in this study. The coating increases the adhesive bond between fibre and UHPC matrix indicated by straight fibre pullout. However, pullout tests with inclined fibres reveal contrary results, displayed in the flexural bending tests.

引用

页数：13

共 35 条

[1] Bonding Mechanisms and Strength of Steel Fiber-Reinforced Cementitious Composites: Overview [J].

Abdallah, Sadoon ;

Fan, Mizi ;

Rees, David W. A. .

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2018, 30 (03)

[2] Effect of cooling temperature on deconsolidation and pulling forces in a thermoplastic pultrusion process [J].

Alsinani, Nawaf ;

Ghaedsharaf, Mohammad ;

Lebel, Louis Laberge .

COMPOSITES PART B-ENGINEERING, 2021, 219

[3]

[Anonymous], 2017, DIN EN 12390-5

[4] Mechanical properties of steel and polymer fiber reinforced concrete [J].

Babaie, Reza ;

Abolfazli, Milad ;

Fahimifar, Ahmad .

JOURNAL OF THE MECHANICAL BEHAVIOR OF MATERIALS, 2019, 28 (01) :119-134

[5] UHPC evolution, development, and utilization in construction: a review [J].

Bajaber, M. A. ;

Hakeem, I. Y. .

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2021, 10 :1058-1074

[6]

Baur E., 2013, Saechtling Kunststoff Taschenbuch, V31st

[7] Ultra-high performance fibre-reinforced cementitious composite with steel microfibres functionalized with silane [J].

Casagrande, Cezar Augusto ;

Cavalaro, Sergio Henrique Pialarissi ;

Repette, Wellington Longuini .

CONSTRUCTION AND BUILDING MATERIALS, 2018, 178 :495-506

[8] Benefits of chemically treated steel fibers on enhancing the interfacial bond strength from ultra-high-performance concrete [J].

Chun, Booki ;

Kim, Soonho ;

Yoo, Doo-Yeol .

CONSTRUCTION AND BUILDING MATERIALS, 2021, 294

[9]

DAfStb-Richtlinie: Stahlfaserbeton, 2008, 1045 DIN

[10] Steel Fiber-Matrix Interfacial Bond in Ultra-High Performance Concrete: A Review [J].

Deng, Yulin ;

Zhang, Zuhua ;

Shi, Caijun ;

Wu, Zemei ;

Zhang, Chaohui .

ENGINEERING, 2023, 22 :215-232

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