TY - JOUR
T1 - Textile-cement bond enhancement
T2 - Sprinkle some hydrophilic powder
AU - Alatawna, Amr
AU - Sripada, Raghu
AU - Nahum, Lior
AU - Birenboimi, Matan
AU - Regev, Oren
AU - Peled, Alva
N1 - Funding Information:
The authors would like to acknowledge the financial support from the Israel Science Foundation (ISF) , grant number 1106/17 .
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7/1
Y1 - 2021/7/1
N2 - 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.
AB - 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.
KW - Bond strength
KW - Epoxy coating
KW - Material surface modification
KW - Single-yarn pull-out test
KW - Textile reinforced concrete
KW - Textile-cement interface
UR - http://www.scopus.com/inward/record.url?scp=85104328434&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2021.104031
DO - 10.1016/j.cemconcomp.2021.104031
M3 - Article
AN - SCOPUS:85104328434
SN - 0958-9465
VL - 120
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 104031
ER -