KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Revision of Repair Materials Performance Requirement for Concrete Structures

콘크리트 구조물 단면복구공사 보수재료 품질기준개선

  • 이일근 (한국도로공사 도로교통연구원) ;
  • 김기환 (한국도로공사 도로교통연구원) ;
  • 김홍삼 (한국도로공사 도로교통연구원) ;
  • 윤성환 (한국도로공사 도로교통연구원) ;
  • 김우석 (충남대학교 토목공학과)
  • Received : 2022.11.24
  • Accepted : 2023.01.12
  • Published : 2023.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

For highway concrete structures, the deterioration of the structure is accelerated due to the increase in the use of deicing materials, and sectional 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 material requirements were first analyzed, and present domestic requirements were improved repair material performance through field surveys of common concrete structures, laboratory experiments, and test construction on a disused concrete bridge. In addition, performancebased quality requirements were presented so that all materials that meet the required performance can be applied, and different test methods for each material were unified into concrete test methods for consistent test results analysis. The considered performance requirements were compression strength, bending strength, and bond strength for structural properties, and length change rate, crack resistance, thermal expansion coefficient, and elasticity coefficient were for dimensional behavior. For resistance to chloride penetration resistance and freeze-thaw resistance were presented as durability. The proposed requirements for concrete repair materials are expected to contribute to the improvement of the quality of concrete sectional repair work in Korea.

고속도로 콘크리트 구조물은 제설제 사용량 증가로 구조물의 열화가 가속되고 있어 성능회복을 위해 단면복구공사를 실시하고 있다. 하지만, 보수공사 이후 보수부위에 균열, 들뜸 및 부착성능 저하 등의 재손상이 나타나고 있다. 본 연구에서는 먼저 해외 기준을 분석하였고, 공용 중인 콘크리트 구조물의 현장조사, 실내실험, 폐교량에 대한 시험시공을 통해 균열 방지 및 부착성능향상을 위해 강화된 기준을 제시하였다. 요구성능이 충족되는 재료는 모두 적용이 가능하도록 성능기반의 품질기준을 제시하였고, 재료별 상이한 시험방법도 일관성 있는 시험결과 분석을 위해 콘크리트 시험법으로 통일하여 제시하였다. 고려된 품질기준은 하중 저항을 위해 역학특성 분야로는 압축강도, 휨강도, 부착강도 기준을 마련하였고, 체적안정성을 위해 길이변화율, 균열저항성, 열팽창계수, 탄성계수를 기준을 마련하였다. 제설염해에 대한 저항성을 위해 내구성능 분야로는 염분침투저항성과 동결융해저항성 기준을 제시하였다. 본 연구에 의해 제시된 콘크리트 보수재료의 기준은 국내의 단면복구공사 품질향상에 기여할 것으로 기대된다.

Keywords

Acknowledgement

본 연구는 한국도로공사의 지원을 받아 수행된 연구입니다. 본 논문은 2022 CONVENTION 논문을 수정·보완하여 작성되었습니다.

References

  1. AASHTO T 334-08 (2020). Standard method of test for estimating the cracking tendency of concrete, American Association of State Highway and Transportation Officials (AASHTO), Washington DC, USA.
  2. AASHTO T 336-15 (2019). Standard method of test for coefficient of thermal expansion of hydraulic cement concrete, American Association of State Highway and Transportation Officials (AASHTO), Washington DC, USA.
  3. ACI (2013). Concrete repair manual, 4th Edition, American Concrete Institute (ACI), Garmington Hills, Michigan, USA.
  4. ACI 546.3R (2014). Guide to materials selection for concrete repair, ACI Committee 546, American Concrete Institute (ACI), Garmington Hills, Michigan, USA.
  5. ASTM C1042 (1999). Standard test method for bond strength of latex systems used with concrete by slant shear (Withdrawn 2008), American Society of Testing Materials (ASTM), West Conshohocken, PA, USA.
  6. ASTM C1404 (2003). Standard test method for bond strength of adhesive systems used with concrete as measured by direct tension (Withdrawn 2010), American Society of Testing Materials (ASTM), West Conshohocken, PA, USA.
  7. ASTM C1581 (2018). Standard test method for determining age at cracking and induced tensile stress characteristics of mortar and concrete under restrained shrinkage, USA, American Society for Testing Materials (ASTM), West Conshohocken, PA.
  8. ASTM C1583 (2020). Standard test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension (Pull-off Method), American Society of Testing Materials (ASTM), West Conshohocken, PA, USA.
  9. ASTM C882 (2020). Standard test method for bond strength of epoxy-resin systems used with concrete by slant shear, American Society of Testing Materials (ASTM), West Conshohocken, PA, USA.
  10. CSA A23.2-6B (2014). Method of test to determine adhesion by tensile load, Canadian Standard Association (CSA), Toronto, ON, Canada.
  11. EN 12617-4 (2002). Products and systems for the protection and repair of concrete structures-Test methods - Part 4: Determination of shrinkage and expansion, European Committee for Standardization; European Standard (EN).
  12. EN 13687-1 (2002). Products and systems for the protection and repair of concrete structures-Test methods - Determination of thermal compatibility - Part 1: Freez-thaw cycling with de-icing salt immersion, European Committee for Standardization; European Standard (EN).
  13. EN 13687-2 (2002). Products and systems for the protection and repair of concrete structures-Test methods - Determination of thermal compatibility - Part 2: Thunder-shower cycling, European Committee for Standardization; European Standard (EN).
  14. EN 13687-4 (2002). Products and systems for the protection and repair of concrete structures-Test methods - Determination of thermal compatibility - Part 4: Dry thermal cycling, European Committee for Standardization; European Standard (EN).
  15. EN 1504 (2005). Products and systems for the protection and repair of concrete structures-defintions, requirements, quality control an evaluation of conformity, European Committee for Standardization; European Standard (EN).
  16. EN 1542 (2005). Products and systems for the protection and repair of concrete structures-Test methods-Measurement of bond strength by pull-off, European Committee for Standardization; European Standard (EN).
  17. EXCS 44 50 15 (2021). Cement concrete pavement construction, korea expressway corporation (KEC), Gimcheon, Kyungbuk, Republic of Korea (in Korean).
  18. EXCS 44 99 30 (2021). Whole/partial section repair, Korea Expressway Corporation (KEC), Gimcheon, Kyungbuk (in Korean).
  19. ICRI 210.3R (2022). Guide for using in-situ tensile pulloff tests to evaluate bond of concrete surface materials, International Concrete Repair Institute (ICRI), St. Paul, Minnesota, USA.
  20. ICRI 320.2R (2018). Guide for selecting and specifying materials for repair of concrete surfaces, International Concrete Repair Institute (ICRI), St. Paul, Minnesota, USA.
  21. Jeong, Y. S., Lee, I. K., Min, G. H., Kim, K. H. and Kim, W. S. (2023). "Removal area of deteriorated concretes for concrete repairs." Journal of the Korea Concrete Institute, Vol. 35, No. 1 (in Korean).
  22. KS F 2405 (2022). Standard test method for compressive strength of concrete, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  23. KS F 2408 (2021). Standard test method for flexural strength of concrete, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  24. KS F 2424 (2020). Standard test method for length change of mortar and concrete, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  25. KS F 2438 (2022). Standard test method for static modulus of elasticity and poisson's ratio in compression of cylindrical concrete specimens, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  26. KS F 2456 (2018). Standard test method for resistance of concrete to rapid freezing and thawing, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  27. KS F 2476 (2019). Standard test method for polymer-modified cement mortar, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  28. KS F 2608 (2022). Standard test method for measuring of linear thermal expansion for building materials, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  29. KS F 2711 (2022). Standard test method for resistance of concrete to chloride ion penetration by electrical conductance, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  30. KS F 2762 (2021). Standard test method for the bond strength of concrete repair and overlay materials by pull-off method, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  31. KS F 4042 (2022). Polymer modified cement mortar for maintenance in concrete structure, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  32. KS F 4043 (2018). Epoxy resin martar for restoration in concrete structure, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  33. KS F 4716 (2022). Cement filling compound for surface preparation, Korea Agency for Technology and Standards (KATS), Korea Standard Association (KSA), Seoul, Korea (in Korean).
  34. Min, G. H., Lee, I. K., Jeong, Y. S. and Kim, W. S. (2021). "Proposals for enhancing performance of repair of deteriorated concrete structures." Journal of the Korea Concrete Institute, Vol. 33, No. 6, pp. 579-587 (in Korean). https://doi.org/10.4334/JKCI.2021.33.6.579