International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Bond Strength Characteristics of Bonded Concrete Overlay

접착식 콘크리트 덧씌우기의 부착강도 특성 분석

  • 박종원 (강릉원주대학교 토목공학과) ;
  • 김영규 (강릉원주대학교 토목공학과) ;
  • 이승우 (강릉원주대학교 토목공학과) ;
  • 한승환 (한국도로공사 도로교통연구원)
  • Received : 2013.02.26
  • Accepted : 2013.07.23
  • Published : 2013.08.16
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Abstract

PURPOSES : Bonded concrete overlay is a favorable maintenance method since the material properties are similar to existing concrete pavements. In addition, bonded concrete overlay has advantage of structural performance since the overlay layer and the existing pavement perform as a monolithic layer. It is important to have suitable bond strength criteria to secure the performance of bonded concrete overlay. This study aimed to investigate the factors influencing bond strength characteristics between existing concrete pavement and overlay material. METHODS: Bond strength between overlay and existing pavement are measured and analyzed for various conditions such as the type of overlay materials, compressive and flexure strength of overlay and existing pavement, and deterioration status of existing pavement. RESULTS: The strength of overlay material does not significantly influence the bond strength. The overlay of ultra-rapid hardening cement generally gives low bond strength. However, ultra rapid hardening polymer modified concrete gives robust bond strength. The deterioration of existing concrete significantly decrease the bond strength. CONCLUSIONS: Bond strength of bonded concrete overlay highly depends on condition of existing concrete pavement rather than overlay material.

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References

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