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

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