TY - JOUR
T1 - Bond performance between FRP tubes and seawater sea sand concrete after exposure to seawater condition
AU - Bazli, Milad
AU - Zhao, Xiao-Ling
AU - Singh Raman, R. K.
AU - Bai, Yu
AU - Al-Saadi, Saad
PY - 2020/12/30
Y1 - 2020/12/30
N2 - In this study the durability of the bond between different fibre reinforced polymer (FRP) tubes and seawater sea sand concrete (SWSSC) under seawater condition is investigated. Concrete filled pultruded glass fibre reinforced polymer (GFRP) tubes and filament winding GFRP, carbon fibre reinforced polymer (CFRP) and basalt fibre reinforced polymer (BFRP) tubes were exposed to seawater at 25 °C and 40 °C for 1, 3 and 6 months. Push-out tests were carried out to study the bond performance of concrete filled FRP tubes (CFFT). The bond strength changes compared to the reference samples, in terms of the mechanical and chemical bonds, were calculated. The results showed that for all cases except one condition that had the same value as the reference, the maximum bond strength of the tubes increased due to the conditioning, however, the bond strength at the chemical adhesion breaking moment decreased by the conditioning. In other words, the friction coefficients of the samples increased due to conditioning, while the chemical adhesion decreased. Equations are proposed to predict the bond strength corresponding to slip initiations.
AB - In this study the durability of the bond between different fibre reinforced polymer (FRP) tubes and seawater sea sand concrete (SWSSC) under seawater condition is investigated. Concrete filled pultruded glass fibre reinforced polymer (GFRP) tubes and filament winding GFRP, carbon fibre reinforced polymer (CFRP) and basalt fibre reinforced polymer (BFRP) tubes were exposed to seawater at 25 °C and 40 °C for 1, 3 and 6 months. Push-out tests were carried out to study the bond performance of concrete filled FRP tubes (CFFT). The bond strength changes compared to the reference samples, in terms of the mechanical and chemical bonds, were calculated. The results showed that for all cases except one condition that had the same value as the reference, the maximum bond strength of the tubes increased due to the conditioning, however, the bond strength at the chemical adhesion breaking moment decreased by the conditioning. In other words, the friction coefficients of the samples increased due to conditioning, while the chemical adhesion decreased. Equations are proposed to predict the bond strength corresponding to slip initiations.
KW - Bond strength
KW - Chemical bond
KW - Concrete filled FRP tubes
KW - Durability
KW - Seawater
KW - Seawater sea sand concrete
UR - http://www.scopus.com/inward/record.url?scp=85088904033&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.120342
DO - 10.1016/j.conbuildmat.2020.120342
M3 - Article
AN - SCOPUS:85088904033
SN - 0950-0618
VL - 265
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 120342
ER -