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

循环荷载和风化条件下水泥基修补材料与防水卷材的粘结特性

• 批准号: 533917-2018
• 负责人: Gupta, Rishi
• 金额: $ 3.04万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719961
• 关键词: Bonding; characteristics; cementitious; repair; materials

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.

该项目将建立在 Read Jones Christofferson Ltd (RJC) 与维多利亚大学 (UVic) 创新材料和基础设施监测设施 (FIMIM) 的 Rishi Gupta 博士研究小组之间持续成功合作关系的基础上。之前完成的 NSERC Engage 赠款构成了该项目的基础。据一些研究人员报道，水泥基修复的脱粘是主要问题之一。该项目将涉及研究三种市售水泥修复材料在承受循环荷载时粘结特性的变化。除了这三种混合物外，还将开发第四种混合物，该混合物采用低水泥含量，并含有经过专利技术处理的纤维，可提高纤维与基体的粘合强度。该项目的另一个方面将涉及研究在经历显着蒸汽驱动的地面上新的和修复的结构板上使用防水膜的粘合和有效性。该项目旨在为RJC提供在不同气候条件下选择不同修复材料的指导，以实现最大的耐用性和粘合强度。该项目将提高维多利亚大学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。由于修复材料的专有性质，制造商不愿意提供其材料的完整详细信息，因此这些产品的用户可获得的信息有限，这是可以理解的。该项目将深入了解不同修复系统在不同环境条件下的正确应用，以及如何选择和修改修复组合以获得卓越性能的综合准则。该项目将填补先前研究人员在修复材料在海洋环境中实际应用方面留下的知识空白。