| Title |
Revision of Repair Materials Performance Requirement for Concrete Structures |
| Authors |
이일근(Lee, Il Keun) ; 김기환(Kim, Ki Hwan) ; 김홍삼(Kim, Hong Sam) ; 윤성환(Yun, Sung Hwan) ; 김우석(Kim, Woo Seok) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.1.0009 |
| Keywords |
콘크리트; 단면복구공사; 보수재료; 품질기준 Concrete; Sectional repair; Repair material; Performance requirement |
| Abstract |
For highway concrete structures, the deterioration of the structure is accelerated due to the increase in the use of deicing materials, andsectional repair work is being frequently carried out to restore performance. However, after the repair work, re-damage such as cracks,delamination, and poor bond performance is exhibited in the repaired sectional area. In this study, overseas repair materialrequirements were first analyzed, and present domestic requirements were improved repair material performance through field surveysof common concrete structures, laboratory experiments, and test construction on a disused concrete bridge. In addition, performance-based quality requirements were presented so that all materials that meet the required performance can be applied, and different testmethods for each material were unified into concrete test methods for consistent test results analysis. The considered performancerequirements were compression strength, bending strength, and bond strength for structural properties, and length change rate, crackresistance, thermal expansion coefficient, and elasticity coefficient were for dimensional behavior. For resistance to chloride penetrationresistance and freeze-thaw resistance were presented as durability. The proposed requirements for concrete repair materials areexpected to contribute to the improvement of the quality of concrete sectional repair work in Korea. |