Textile-cement bond enhancement: Sprinkle some hydrophilic powder

Amr Alatawna, Raghu Sripada, Lior Nahum, Matan Birenboimi, Oren Regev, Alva Peled

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Textile reinforced concrete (TRC) has recently gained significant attention in the field of construction. The textile is made of multifilament yarns that exhibit telescopic pull-out behavior reducing its reinforcing efficiency. The remedy lies in epoxy coating, which facilitates full utilization of all filaments within the yarn during loading. Nevertheless, the obtained interfacial bonding between the hydrophilic cementitious matrix and hydrophobic epoxy coating is rather weak. In this study, several coating strategies were employed to enhance the interface bonding by modifying the textile surface with graphene oxide or cement powder. The effect of these coatings on the pull-out behavior of a single multifilament yarn from a cementitious matrix was systematically investigated and compared to that of plain or neat epoxy-coated yarns. The pull-out mechanism was found to involve adhesion followed by friction. The best adhesion between the epoxy-coated yarn and the cementitious matrix was obtained for cement powder sprinkled over freshly coated epoxy yarn, yielding an enhancement in chemical debonding energy of 472% compared to a plain yarn. The highest slippage energy (indicating friction) was obtained for a coated epoxy surface decorated with a small amount of cement or graphene oxide particles, which provided improved mechanical anchoring.

Original languageEnglish
Article number104031
JournalCement and Concrete Composites
Volume120
DOIs
StatePublished - 1 Jul 2021

Keywords

  • Bond strength
  • Epoxy coating
  • Material surface modification
  • Single-yarn pull-out test
  • Textile reinforced concrete
  • Textile-cement interface

Fingerprint

Dive into the research topics of 'Textile-cement bond enhancement: Sprinkle some hydrophilic powder'. Together they form a unique fingerprint.

Cite this