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A Study of Evaluation for Optimum Content and Bond Strength Properties of Bituminous Materials applied for preventing Separation of Asphalt Pavement Layers

아스팔트 포장층 분리억제용 역청재료의 부착성능 및 최적함량 평가에 대한 연구

  • 김도완 ((주)건화 도로공항부) ;
  • 이상염 (인덕대학교 건설정보과) ;
  • 문성호 (서울과학기술대학교 건설시스템공학과)
  • Received : 2016.11.24
  • Accepted : 2016.11.30
  • Published : 2016.12.15

Abstract

OBJECTIVES : Bituminous materials, such as tack coat, are utilized between pavement layers for improving the bond strength in pavement construction sites. The standards regarding the application of bituminous material are not clearly presented in the Korean construction guideline without RS(C)-4. Hence, the objective of this study is to determine the optimum content of bituminous materials by analyzing interlayer shear strength (ISS) from the direct shear tester, which was developed in this research. The shear strength of tack coat was defined with the sort of bituminous materials. METHODS : The mixtures for the shear test were made using marshall mix design. The specimens were vertically and horizontally separated for the direct shear test. The separated specimens were bonded using bituminous material. The objectives of the experiment are to determine the performance of bond and shear properties resulting from slippage, rutting, shovel, and corrugation of asphalt pavements. A machine based on the Louisiana interlayer shear strength tester (LISST) of NCHRP Report-712 was developed to determine the ISS. The applied types of tack coat were RS(C)-4, AP-3, QRS-4, and BD-coat with contents of $0.3{\ell}/m^2$, $0.45{\ell}/m^2$, $0.6{\ell}/m^2$, and $0.8{\ell}/m^2$, respectively. RESULTS : Table 2 gives the results of the direct shear test using the developed shear machine. The BD-coat type indicated the highest average ISS value compared to the others. Between the surface and binder course, optimum tack coat application rates for AP-3, RS(C)-4, QRS-4, and BD-Coat were $0.6{\ell}/m^2$, $0.3{\ell}/m^2$, $0.6{\ell}/m^2$, and $0.45{\ell}/m^2$, respectively. These optimum contents were determined using the ISS value. CONCLUSIONS : The ISS values of AP-3, RS(C)-4, and QRS-4 showed similar tendencies when ISS increased in the range $0.3{\sim}0.6{\ell}/m^2$, while ISS decreased when the applied rate exceeded $0.6{\ell}/m^2$. Similarly, the highest ISS value of the BD-coat was observed when the applied rate was $0.45{\ell}/m^2$. However, shear strength was similar to the maximum value of ISS when the tack-coat application rate of BD-Coat exceeded $0.45{\ell}/m^2$.

Keywords

References

  1. Dowan Kim, Sungho Mun. (2015) "A Study for Evaluation of Hot Mixed Asphalt Mixtures with Tack-Coat Regarding High-Frequency Dynamic Resistance Performance and Bonding Property", Internaltional Journal of Highway Engineering, Vol. 17, No. 3, pp. 35-47.
  2. Kim, Nak-Suk. (2001) "Evaluation of Slant Shear Strength of Recycled Asphalt Mixture with Different Tack Coat Applications", Journal of the Korean Institute of Resources Recycling, Vol. 10, No. 1, pp. 32-41.
  3. Korea Expressway Corporation. (2012) "Expressway Construction Guide Specification".
  4. Ministry of Construction & Transportation. (2007) "Site Construction Quality Control of Asphalt Pavement".
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  6. Ministry of Land, Transport and Maritime Affairs. (2011) "Bridgedecks Surfacing Design & Construction Provisionally Guide".
  7. Ministry of Land, Infrastructure, and Transport. (2014) "Guide for the reduction of pothole in asphalt concrete mixture".
  8. Tae-Soon Park, Nak-Suk Kim. (2002) "Evaluation of Bonding Strength of Non-woven Paving Fabric U sing Different Tack Coats by Slant Shear Test", The Spring 2002 Geosynthetics Conference, pp. 55-68.

Cited by

  1. Evaluation of Interlayer Shear Properties and Bonding Strengths of a Stress-Absorbing Membrane Interlayer and Development of a Predictive Model for Fracture Energy vol.20, pp.1, 2018, https://doi.org/10.7855/IJHE.2018.20.1.087