International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Bond Characteristics at the Interface between HMA Surface and RCC Base

아스팔트 표층과 RCC 기층 계면에서의 부착특성 연구

  • 홍기 (강릉원주대학교 토목공학과) ;
  • 김영규 (강릉원주대학교 토목공학과) ;
  • 배석일 (삼성물산(주) 건설부문 Civil ENG팀) ;
  • 이승우 (강릉원주대학교 토목공학과)
  • Received : 2017.09.26
  • Accepted : 2017.11.22
  • Published : 2017.12.15
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Abstract

PURPOSES : A composite pavement utilizes both an asphalt surface and a concrete base. Typically, a concrete base layer provides structural capacity, while an asphalt surface layer provides smoothness and riding quality. This pavement type can be used in conjunction with rollercompacted concrete (RCC) pavement as a base layer due to its fast construction, economic efficiency, and structural performance. However, the service life and functionality of composite pavement may be reduced due to interfacial bond failure. Therefore, adequate interfacial bonding between the asphalt surface and the concrete base is essential to achieving monolithic behavior. The purpose of this study is to investigate the bond characteristics at the interface between asphalt (HMA; hot-mixed asphalt) and the RCC base. METHODS : This study was performed to determine the optimal type and application rate of tack coat material for RCC-base composite pavement. In addition, the core size effect, temperature condition, and bonding failure shape were analyzed to investigate the bonding characteristics at the interface between the RCC base and HMA surface. To evaluate the bond strength, a pull-off test was performed using different diameters of specimens such as 50 mm and 100 mm. Tack coat materials such as RSC-4 and BD-Coat were applied in amounts of 0.3, 0.5, 0.7, 0.9, and $1.1l/m^2$ to determine the optimal application rate. In order to evaluate the bond strength characteristics with temperature changes, a pull-off test was carried out at -15, 0, 20, and $40^{\circ}C$. In addition, the bond failure shapes were analyzed using an image analysis program after the pull-off tests were completed. RESULTS : The test results indicated that the optimal application rate of RSC-4 and BD-Coat were $0.8l/m^2$, $0.9l/m^2$, respectively. The core size effect was determined to be negligible because the bond strengths were similar in specimens with diameters of 50 mm and 100 mm. The bond strengths of RSC-4 and BD-Coat were found to decrease significantly when the temperature increased. As a result of the bonding failure shape in low-temperature conditions such as -15, 0, and $20^{\circ}C$, it was found that most of the debonding occurred at the interface between the tack coat and RCC surface. On the other hand, the interface between the HMA and tack coat was weaker than that between the tack coat and RCC at a high temperature of $40^{\circ}C$. CONCLUSIONS : This study suggested an optimal application rate of tack coat materials to apply to RCC-base composite pavement. The bond strengths at high temperatures were significantly lower than the required bond (tensile) strength of 0.4 MPa. It was known that the temperature was a critical factor affecting the bond strength at the interface of the RCC-base composite pavement.

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References

  1. Al-Qadi, I. L., Carpenter, S. H., Leng, Z., Ozer, H., and Trepanier, J. (2008). Tack coat optimization for HMA overlays: Laboratory testing, FHWA-ICT-08-023, Illinois Department of Transportation, Illinois.
  2. ASTM D8-02 (2004). Standard Terminology Relating to Materials for Roads and Pavements.
  3. ASTM C1435 (2008). Standard Practice for Molding Roller-Compacted Concrete in Cylinder Molds Using a Vibrating Hammer.
  4. Cho, M. J. (2013). "Investigation into bonding characteristics of tack coat materials for asphalt overlay on concrete pavement." International Journal of Highway Engineering. Vol. 15, No. 4, pp.85-94. https://doi.org/10.7855/IJHE.2013.15.4.085
  5. Kim, D., & Mun, S. (2015). "A Study for Evaluation of Hot Mixed Asphalt Mixtures with Tack-Coat Regarding High-Frequency Dynamic Resistance Performance and Bonding Property." International Journal of Highway Engineering, Vol. 17, No. 3, pp.35-47. https://doi.org/10.7855/IJHE.2015.17.3.035
  6. Korea Expressway Corporation (2015). Long-term remodeling strategy due to aging of highway concrete pavement (in Korean).
  7. KS F 4932, (2007). Waterproofing membrane coating for concrete deck of bridge, Korean Agency for Technology and Standards.
  8. Lee, S. W., & Son, H. J. (2011). "A study on the factors affecting on the life of bonded concrete overlay pavement using the LTPP data of USA." Journal of The Korean Society of Civil Engineers., Vol. 31, No. 2, pp.31-39.
  9. Liu, K., Wang, F., & Wang, X. (2012). Research on Interlaminar Instability Failure of Asphalt Overlay on Old Cement Pavement, No. 12-3150, TRB, Washington, D.C.
  10. Medina-Chavez, C.I., Choi, S. and Won, M.C., (2008). Concrete Pavement Overlays and 280 Failure Mechanisms. Center for Transportation Research, Report No. FHWA/TX-09/0-4893-2, Center for Transportation Research The University of Texas, Texas.
  11. Ministry of Land, Infrastructure, and Transport (2016). 2016-2020 Study of highway construction plan (in Korean).
  12. Mohammad et al. (2012). Optimization of Tack Coat for HMA Placement, NCHRP Report 712, TRB, Washington, D.C.
  13. Raab, C., Partl, M. N. (2004). "Interlayer Shear Performance :Experience with Different Pavement Structures.", 3th Eurasphalt & Eurobitume Congress, Vienna, Austria, Vol.1, pp.535-545.
  14. Rahman, A., Ai, C., Xin, C., Gao, X., & Lu, Y. (2017). "State-of-the-art review of interface bond testing devices for pavement layers: toward the standardization procedure." Journal of Adhesion Science and Technology, Vol. 31, No. 2, pp.109-126. https://doi.org/10.1080/01694243.2016.1205240
  15. Rao, S. P. (2013). Composite pavement systems Volum 1: HMA/PCC composite pavements report, S2-R21-RR-2, TRB, Washington, D.C.
  16. Rith, M., Kim, Y. K., Hong, S. J., & Lee, S. W. (2017). "Effect of horizontal loading on RCC-base composite pavement performance at heavy duty area.", Construction and Building Materials, Vol. 131, pp.741-745. https://doi.org/10.1016/j.conbuildmat.2016.11.028
  17. West, R. C., Zhang, J., & Moore, J. (2005). Evaluation of bond strength between pavement layers. NCAT report, 05-08, National Center for Asphalt Technology, Alabama.
  18. Xu, Q., Zhou, Q., Medina, C., Chang, G. K., & Rozycki, D. K. (2009). "Experimental and numerical analysis of a waterproofing adhesive layer used on concrete-bridge decks.", International Journal of Adhesion and Adhesives, Vol. 29, No. 5, pp.525-534. https://doi.org/10.1016/j.ijadhadh.2008.12.001