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首页> 外文会议>Pipeline Division Specialty Conference >Bonding Strength of Epoxy Coatings Used to Protect Concrete in Wastewater Facilities and 3-D FEM Analyses
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Bonding Strength of Epoxy Coatings Used to Protect Concrete in Wastewater Facilities and 3-D FEM Analyses

机译：用于保护混凝土的环氧涂层的粘合强度和3-D有限元分析

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摘要

In this study, three commercially available epoxy-based coatings were selected to determine the changes in bonding strengths to concrete with curing time. The CIGMAT CT-2 (modified ASTM D 4541) test was used to determine the bonding strengths of the coatings to dry and wet concrete surfaces. The tests were conducted over a period of two years. A total of 33 CIGMAT CT-2 tests (laboratory and in-situ tests) were performed on the three epoxy coatings. Five failure types were identified. Test results showed that although all of the coatings were epoxy based, the bonding strength of the coatings to the dry and wet concrete surfaces were different. Epoxy-A (pure epoxy) and Epoxy-B (glass fiber reinforced epoxy) had good bonding strength ( > 1.4 MPa, 200 psi) on both dry and wet concrete surfaces; Epoxy-C (cementitous based epoxy coating) had poor cohesive bonding strength ( < 0.7 MPa, 100 psi) between the topcoat (epoxy) and the base material. A 3-D FEM analysis was performed to determine the effects of coating modulus and thickness on the stress distribution in the coating, coating to concrete interface and concrete.
机译：在该研究中，选择三种可商购的环氧基涂层以确定粘合强度与固化时间混凝土的变化。 CIGMAT CT-2（改进的ASTM D 4541）试验用于确定涂层的粘合强度与干燥和湿混凝土表面。测试是在两年的时间内进行的。在三种环氧涂层上进行总共33种CIGMAT CT-2测试（实验室和原位试验）。确定了五种故障类型。测试结果表明，尽管所有涂层都是环氧树脂的，但涂层的粘合强度与干燥和湿混凝土表面不同。环氧-A（纯环氧）和环氧-B（玻璃纤维增​​强环氧树脂）在干燥和湿混凝土表面上具有良好的粘合强度（> 1.4MPa，200 psi）;环氧-C（基于碳酸环氧涂层）在面涂层（环氧）和基材之间具有差的内聚粘合强度（<0.7MPa，100psi）。进行3D有限元分析以确定涂层模量和厚度对涂层中应力分布的影响，混凝土界面和混凝土的应力分布。

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