Fiber-to-mortar bond behavior in TRM composites: Effect of embedded length and fiber configuration

Ali Dalalbashi; Bahman Ghiassi; Daniel V. Oliveira; Ana Freitas

doi:10.1016/j.compositesb.2018.06.014

Fiber-to-mortar bond behavior in TRM composites: Effect of embedded length and fiber configuration

Ali Dalalbashi^*, Bahman Ghiassi, Daniel V. Oliveira, Ana Freitas

^*Corresponding author for this work

Civil Engineering

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

The use of Textile Reinforced Mortar (TRM) composites for Externally Bonded Reinforcement (EBR) of reinforced concrete (RC) and masonry structures has attracted several attentions during the last years. The effectiveness of these composites in structural reinforcement is significantly dependent on the TRM-to-substrate and the fiber-to-mortar bond behavior. Despite the importance of the latter, that controls the crack distribution on these composites, have received few attentions and is relatively unknown. This paper presents a combined experimental and analytical study on the effect of fiber-embedded length and configuration on the pull-out response. From the obtained results, bond-slip laws are proposed for TRM composites made of unidirectional and bidirectional grids. The tests are performed on a (unidirectional) steel-based and a (bidirectional) glass-based TRM composite as common reinforcing systems. A comparison is also made between the results obtained from single-fiber pull-out tests and conventional single-lap shear bond tests to highlight the differences/similarities between these two test methods.

Original language	English
Pages (from-to)	43-57
Number of pages	15
Journal	Composites Part B: Engineering
Volume	152
DOIs	https://doi.org/10.1016/j.compositesb.2018.06.014
Publication status	Published - 1 Nov 2018

Bibliographical note

Funding Information:
This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633. The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531. In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers.

Funding Information:
This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633 . The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531 . In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

Analytical modeling
Fiber/matrix bond
Mechanical testing
Pull-out testing

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.compositesb.2018.06.014

Cite this

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title = "Fiber-to-mortar bond behavior in TRM composites: Effect of embedded length and fiber configuration",

abstract = "The use of Textile Reinforced Mortar (TRM) composites for Externally Bonded Reinforcement (EBR) of reinforced concrete (RC) and masonry structures has attracted several attentions during the last years. The effectiveness of these composites in structural reinforcement is significantly dependent on the TRM-to-substrate and the fiber-to-mortar bond behavior. Despite the importance of the latter, that controls the crack distribution on these composites, have received few attentions and is relatively unknown. This paper presents a combined experimental and analytical study on the effect of fiber-embedded length and configuration on the pull-out response. From the obtained results, bond-slip laws are proposed for TRM composites made of unidirectional and bidirectional grids. The tests are performed on a (unidirectional) steel-based and a (bidirectional) glass-based TRM composite as common reinforcing systems. A comparison is also made between the results obtained from single-fiber pull-out tests and conventional single-lap shear bond tests to highlight the differences/similarities between these two test methods.",

keywords = "Analytical modeling, Fiber/matrix bond, Mechanical testing, Pull-out testing",

author = "Ali Dalalbashi and Bahman Ghiassi and Oliveira, {Daniel V.} and Ana Freitas",

note = "Funding Information: This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633. The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531. In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers. Funding Information: This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633 . The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531 . In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers. Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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doi = "10.1016/j.compositesb.2018.06.014",

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AU - Dalalbashi, Ali

AU - Ghiassi, Bahman

AU - Oliveira, Daniel V.

AU - Freitas, Ana

N1 - Funding Information: This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633. The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531. In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers. Funding Information: This work was partly financed by FEDER funds through the Competitively Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633 . The support to the first author through grant SFRH/BD/131282/2017 is acknowledged. The second author acknowledges the financial support of the European Union's Marie Curie Individual Fellowship program under REA grant agreement No. 701531 . In addition, authors would like to thank the Kerakoll Company for supplying the GeoCalce Fino mortar as well as GeoSteel G600 fibers. Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/11/1

Y1 - 2018/11/1

N2 - The use of Textile Reinforced Mortar (TRM) composites for Externally Bonded Reinforcement (EBR) of reinforced concrete (RC) and masonry structures has attracted several attentions during the last years. The effectiveness of these composites in structural reinforcement is significantly dependent on the TRM-to-substrate and the fiber-to-mortar bond behavior. Despite the importance of the latter, that controls the crack distribution on these composites, have received few attentions and is relatively unknown. This paper presents a combined experimental and analytical study on the effect of fiber-embedded length and configuration on the pull-out response. From the obtained results, bond-slip laws are proposed for TRM composites made of unidirectional and bidirectional grids. The tests are performed on a (unidirectional) steel-based and a (bidirectional) glass-based TRM composite as common reinforcing systems. A comparison is also made between the results obtained from single-fiber pull-out tests and conventional single-lap shear bond tests to highlight the differences/similarities between these two test methods.

AB - The use of Textile Reinforced Mortar (TRM) composites for Externally Bonded Reinforcement (EBR) of reinforced concrete (RC) and masonry structures has attracted several attentions during the last years. The effectiveness of these composites in structural reinforcement is significantly dependent on the TRM-to-substrate and the fiber-to-mortar bond behavior. Despite the importance of the latter, that controls the crack distribution on these composites, have received few attentions and is relatively unknown. This paper presents a combined experimental and analytical study on the effect of fiber-embedded length and configuration on the pull-out response. From the obtained results, bond-slip laws are proposed for TRM composites made of unidirectional and bidirectional grids. The tests are performed on a (unidirectional) steel-based and a (bidirectional) glass-based TRM composite as common reinforcing systems. A comparison is also made between the results obtained from single-fiber pull-out tests and conventional single-lap shear bond tests to highlight the differences/similarities between these two test methods.

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VL - 152

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JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

ER -

Fiber-to-mortar bond behavior in TRM composites: Effect of embedded length and fiber configuration

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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