A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fibre pullout behaviour of fibre-reinforced UHPC with TPE-coated fibres
Highlights TPE-coating of microfibres enhances the adhesive bond between fibre and UHPC. Inclined fibre pullout tests are more significant than straight pullout tests. TPE-coating of microfibres combines the advantages of metals and plastics.
Abstract 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.
Fibre pullout behaviour of fibre-reinforced UHPC with TPE-coated fibres
Highlights TPE-coating of microfibres enhances the adhesive bond between fibre and UHPC. Inclined fibre pullout tests are more significant than straight pullout tests. TPE-coating of microfibres combines the advantages of metals and plastics.
Abstract 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.
Fibre pullout behaviour of fibre-reinforced UHPC with TPE-coated fibres
Schleiting, Maximilian (author) / Klier, Kevin (author) / Wiemer, Niels (author) / Wetzel, Alexander (author) / Zarges, Jan-Christoph (author) / Heim, Hans-Peter (author) / Middendorf, Bernhard (author)
2023-03-12
Article (Journal)
Electronic Resource
English
| DataCite | 2020
UHPC Fibre Dispersion, Rheology And Mixing Time Of Fibre Reinforced UHPC
| British Library Conference Proceedings | 2010
Single fibre pullout tests on auxetic polymeric fibres
| British Library Online Contents | 2005