Bonding characteristics of cementitious repair materials and waterproofing membrane exposed to cyclic loading and weathering conditions

该项目将建立在Read Jones Christofferson Ltd(RJC)和Rishi Gupta博士在维多利亚大学(UVic)创新材料和基础设施监测设施(FIMIM)的研究小组之间持续合作的成功基础上。之前完成的NSERC Engage赠款构成了这个项目的基础。据报道，水泥基修复的脱粘是几位研究人员提出的主要问题之一。本项目将研究三种市售水泥修补材料在循环荷载作用下粘结特性的变化。除了这三种混合料外，还将开发第四种混合料，该混合料利用低水泥含量，并包含采用专利技术处理的纤维，该技术可以提高纤维与基质的粘合强度。该项目的另一个方面将涉及研究在新的和修复的结构楼板上使用防水薄膜的粘结性和有效性，这些结构楼板经历了大量的蒸汽驱动。本项目旨在为RJC在不同气候条件下选择不同的修补材料提供指导，以实现最大的耐久性和粘结强度。该项目将提高UVIC研究小组彻底评估不同混凝土修复系统的可行性和有效性的能力。由于维修材料的专有性质，制造商不愿提供其材料的完整细节是可以理解的，因此这些产品的用户可获得的信息有限。该项目将深入了解不同维修系统在不同环境条件下的正确应用，以及如何选择和修改维修组合以获得更好的性能的综合问题。该项目将填补以前研究人员在海洋环境中实际应用修复材料方面留下的知识空白。

This project will build on the success of the ongoing relationship between Read Jones Christofferson Ltd (RJC) and Dr. Rishi Gupta's research group at the Facility for Innovative Materials and Infrastructure Monitoring (FIMIM) at University of Victoria (UVic). The previously completed NSERC Engage grants form the foundation for this project. Debonding of cement-based repairs has been reported to be one of the major issues by several researchers. This project will involve studying the change in the bonding characteristics of three commercially available cementitious repairs materials when exposed to cyclic loading. In addition to the three mixes a 4th mix will be developed that utilizes low cement content and contains fibers treated with a patented technology that improves the bond strength of fibers with the matrix. Another aspect of this project will involve studying the bonding and effectiveness of using waterproofing membranes on new and repaired structural slabs on grade that experience significant vapor drive. This project aims to provide RJC with guidance on selecting different repair materials applied in different climate conditions so as to achieve maximum durability and bonding strength. This project will improve the ability of the research group at UVic for thoroughly evaluating the feasibility and effectiveness of different concrete repair systems. Due to the proprietary nature of repair materials, manufacturers are understandably reluctant to provide complete details of their materials and thus there is limited information available to users of these products. This project will give an insight into the proper application of different repair systems in different environmental conditions and into a comprehensive rubric on how to select and modify the repair mix for a superior performance. This project will fill the knowledge gaps left by previous researchers on real application of repair materials in marine environments.