• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Cement and Concrete Research >Tensile bonding strength of epoxy coatings to concrete substrate
【24h】

Tensile bonding strength of epoxy coatings to concrete substrate

机译：环氧涂料与混凝土基材的拉伸粘结强度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, four commercially available epoxy coatings were selected to investigate their tensile "bonding characteristics to dry and wet concrete with and without 105-kPa backwater pressure. The CIGMAT CT-2 (modified ASTM jp4541-95el) and CIGMAT CT-3 (modified ASTM C321-00) tests were used to determine the tensile bonding strength of the coatings with curing time. The tests were conducted over a period of 2 years. Fifty-three CIGMAT CT-2 tests and 26 CT-3 tests were performed for the four epoxy coatings. Five failure types were identified for both the test methods based on the failure mechanisms observed during the tests. In situ bonding tests (CIGMAT CT-2, full-scale test with back pressure on) were also performed on coatings that were tested under a hydrostatic (back) pressure of 105 kPa (simulating 10 m of groundwater) for at least 6 months (full-scale test). All the coatings investigated were epoxy based, but their bonding strength and failure modes to dry and wet concrete surfaces were different. For all the coatings investigated, in situ bonding strength with dry concrete was higher than wet concrete. Epoxy-A and Epoxy-D (fiber-mat-reinforced epoxy) had good bonding strength (>1.3 MPa, 190 psi) to both dry and wet concrete surfaces during the 2 years of testing period. The bonding strength of Epoxy-B and Epoxy-C varied with time for both dry and wet concrete surfaces. Although for coatings with higher bonding strength, better correlations between the two test methods were observed, in general, the bonding strength from CIGMAT CT-3 test was higher than that from CIGMAT CT-2 test for the coatings tested.
机译：在这项研究中，选择了四种市售环氧涂料，以研究它们在有和没有105kPa回水压力的情况下对干，湿混凝土的拉伸“粘结”特性。CIGMATCT-2（改良ASTM jp4541-95el）和CIGMAT CT-3（使用改良的ASTM C321-00）测试来确定涂层的拉伸粘合强度随固化时间的变化，测试时间为2年，共进行了53次CIGMAT CT-2测试和26次CT-3测试。根据在测试过程中观察到的失效机理，确定了两种测试方法的五种失效类型，还对涂层进行了原位粘结测试（CIGMAT CT-2，背压测试）在105 kPa（模拟10 m的地下水）的静水压力（背压）下测试了至少6个月（全面测试），所有被调查的涂料都是基于环氧的，但是它们的粘合强度以及干，湿的破坏模式混凝土冲浪王牌是不同的。对于所有研究的涂料，干混凝土的原位粘结强度均高于湿混凝土。环氧A和环氧D（纤维毡增强环氧树脂）在2年的测试期间对干和湿混凝土表面均具有良好的粘结强度（> 1.3 MPa，190 psi）。在干燥和湿润的混凝土表面上，Epoxy-B和Epoxy-C的粘结强度都会随时间变化。尽管对于具有较高粘合强度的涂层，在两种测试方法之间观察到更好的相关性，但通常，CIGMAT CT-3测试的粘合强度高于CIGMAT CT-2测试的测试涂层的粘合强度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号