Bond performance between FRP tubes and seawater sea sand concrete after exposure to seawater condition
Bond performance between FRP tubes and seawater sea sand concrete after exposure to seawater condition
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DOI：
10.1016/j.conbuildmat.2020.120342
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发表时间：
2020-12-30
影响因子：
7.4
通讯作者：
Al-Saadi, Saad
中科院分区：
文献类型：
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作者：
Bazli, Milad;Zhao, Xiao-Ling;Al-Saadi, Saad
本文研究了在海水条件下，不同纤维增强复合材料（FRP）管与海水海砂混凝土（SWSSC）粘结的耐久性。混凝土填充拉挤玻璃纤维增强聚合物（GFRP）管和纤维缠绕GFRP，碳纤维增强聚合物（CFRP）和玄武岩纤维增强聚合物（BFRP）管暴露于海水在25摄氏度和40摄氏度的1，3和6个月。通过推出试验研究了FRP管混凝土的粘结性能。计算了与参考样品相比，在机械和化学键方面的结合强度变化。结果表明，对于所有情况下，除了一个条件，具有相同的值作为参考，由于调理管的最大粘结强度增加，但是，在化学粘合断裂时刻的粘结强度下降的调理。换句话说，由于调节，样品的摩擦系数增加，而化学粘附力降低。方程提出了预测相应的滑移启动的粘结强度。(C)2020爱思唯尔有限公司保留所有权利。
In this study the durability of the bond between different fibre reinforced polymer (FRP) tubes and sea water 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 degrees C and 40 degrees 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. (C) 2020 Elsevier Ltd. All rights reserved.