Enhancement of fabric–mortar interfacial adhesion by particle decoration: insights from pull-off measurements

Matan Birenboim; Amr Alatawna; Raghu Sripada; Lior Nahum; Lucas Luciano Cullari; Alva Peled; Oren Regev

doi:https://doi.org/10.1617/s11527-021-01789-5

Enhancement of fabric–mortar interfacial adhesion by particle decoration: insights from pull-off measurements

Matan Birenboim, Amr Alatawna, Raghu Sripada, Lior Nahum, Lucas Luciano Cullari, Alva Peled, Oren Regev

Ben-Gurion University of the Negev

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

Abstract

Polymer-impregnated carbon fabric is used as an alternative to metallic reinforcement bars in cementitious materials, which is then termed textile-reinforced concrete (TRC). In this study, the bond strength between the cement-based matrix and the fabric was enhanced by decorating the polymer (an epoxy) coating the carbon fabric with hydrophilic micron-size particles (cement or silica) or nanocarbons (functionalized carbon nanotubes or graphene oxide). Cement powder decoration led to a 25% increase in the bond strength (measured by a pull-off test) and a 30% improvement in the mechanical properties of the composite. At the micron scale, the decoration resulted in the formation of a 100-μm thick interlayer between the decorated fabric and the cement-based matrix. Unexpectedly, exposure of the cement-decorated samples to a NaCl environment (as in off-shore constructions) resulted in enhanced bond strength due to the growth of salt crystals at the fabric–matrix interface.

Original language	American English
Article number	200
Journal	Materials and Structures/Materiaux et Constructions
Volume	54
Issue number	6
DOIs	https://doi.org/10.1617/s11527-021-01789-5
State	Published - 1 Dec 2021

Keywords

Adhesion
Carbon fiber
Surface treatments
Textile-reinforce-concrete

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Building and Construction
General Materials Science
Civil and Structural Engineering

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https://doi.org/10.1617/s11527-021-01789-5

Cite this

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title = "Enhancement of fabric–mortar interfacial adhesion by particle decoration: insights from pull-off measurements",

abstract = "Polymer-impregnated carbon fabric is used as an alternative to metallic reinforcement bars in cementitious materials, which is then termed textile-reinforced concrete (TRC). In this study, the bond strength between the cement-based matrix and the fabric was enhanced by decorating the polymer (an epoxy) coating the carbon fabric with hydrophilic micron-size particles (cement or silica) or nanocarbons (functionalized carbon nanotubes or graphene oxide). Cement powder decoration led to a 25% increase in the bond strength (measured by a pull-off test) and a 30% improvement in the mechanical properties of the composite. At the micron scale, the decoration resulted in the formation of a 100-μm thick interlayer between the decorated fabric and the cement-based matrix. Unexpectedly, exposure of the cement-decorated samples to a NaCl environment (as in off-shore constructions) resulted in enhanced bond strength due to the growth of salt crystals at the fabric–matrix interface.",

keywords = "Adhesion, Carbon fiber, Surface treatments, Textile-reinforce-concrete",

author = "Matan Birenboim and Amr Alatawna and Raghu Sripada and Lior Nahum and Cullari, {Lucas Luciano} and Alva Peled and Oren Regev",

note = "Funding Information: This work was supported by the Israel Science Foundation (ISF) [Grant 1106/17] and the ReSHEALience project (Rethinking coastal defence and Green-energy Service infrastructures through enHancEd-durAbiLity high-performance cement-based materials), which received funding from the European Union{\textquoteright}s Horizon 2020 research and innovation program under grant agreement No. 760824. The information and views set out in this publication do not necessarily reflect the official opinion of the European Commission. Publisher Copyright: {\textcopyright} 2021, The Author(s).",

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AU - Nahum, Lior

AU - Cullari, Lucas Luciano

AU - Peled, Alva

AU - Regev, Oren

N1 - Funding Information: This work was supported by the Israel Science Foundation (ISF) [Grant 1106/17] and the ReSHEALience project (Rethinking coastal defence and Green-energy Service infrastructures through enHancEd-durAbiLity high-performance cement-based materials), which received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 760824. The information and views set out in this publication do not necessarily reflect the official opinion of the European Commission. Publisher Copyright: © 2021, The Author(s).

PY - 2021/12/1

Y1 - 2021/12/1

N2 - Polymer-impregnated carbon fabric is used as an alternative to metallic reinforcement bars in cementitious materials, which is then termed textile-reinforced concrete (TRC). In this study, the bond strength between the cement-based matrix and the fabric was enhanced by decorating the polymer (an epoxy) coating the carbon fabric with hydrophilic micron-size particles (cement or silica) or nanocarbons (functionalized carbon nanotubes or graphene oxide). Cement powder decoration led to a 25% increase in the bond strength (measured by a pull-off test) and a 30% improvement in the mechanical properties of the composite. At the micron scale, the decoration resulted in the formation of a 100-μm thick interlayer between the decorated fabric and the cement-based matrix. Unexpectedly, exposure of the cement-decorated samples to a NaCl environment (as in off-shore constructions) resulted in enhanced bond strength due to the growth of salt crystals at the fabric–matrix interface.

AB - Polymer-impregnated carbon fabric is used as an alternative to metallic reinforcement bars in cementitious materials, which is then termed textile-reinforced concrete (TRC). In this study, the bond strength between the cement-based matrix and the fabric was enhanced by decorating the polymer (an epoxy) coating the carbon fabric with hydrophilic micron-size particles (cement or silica) or nanocarbons (functionalized carbon nanotubes or graphene oxide). Cement powder decoration led to a 25% increase in the bond strength (measured by a pull-off test) and a 30% improvement in the mechanical properties of the composite. At the micron scale, the decoration resulted in the formation of a 100-μm thick interlayer between the decorated fabric and the cement-based matrix. Unexpectedly, exposure of the cement-decorated samples to a NaCl environment (as in off-shore constructions) resulted in enhanced bond strength due to the growth of salt crystals at the fabric–matrix interface.

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Enhancement of fabric–mortar interfacial adhesion by particle decoration: insights from pull-off measurements

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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