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Mechanical Testing of Interlayer Bonding in Asphalt Pavements

  • Francesco CanestrariEmail author
  • Gilda Ferrotti
  • Xiaohu Lu
  • Anne Millien
  • Manfred N. Partl
  • Christophe Petit
  • Annabelle Phelipot-Mardelé
  • Herald Piber
  • Christiane Raab
Chapter
Part of the RILEM State-of-the-Art Reports book series (RILEM State Art Reports, volume 9)

Abstract

Steadily increasing requirements on pavement performance properties, in terms of bearing capacity and durability, as well as new innovative developments regarding pavement materials and construction, are observed worldwide. In this context interlayer bonding at the interfaces of multi-layered bituminous systems is recognized as a key issue for the evaluation of the effects, in terms of stress-strain distribution, produced by traffic loads in road pavements. For this reason a correct assessment of interlayer bonding is of primary importance, and research efforts should be addressed in order to improve the lack of correlation and/or harmonization among test methods. Following this principle RILEM TG 4 organized an interlaboratory test in order to compare the different test procedures to assess the interlayer bonding properties of asphalt pavement. The results of the experimental research are presented with a preliminary overview of basic elements, test methods and experimental investigations on interlayer bonding. Then the RILEM TG 4 experimental activities, based on the construction of three real- scale pavement sections, are presented in detail. Each pavement section was composed of two layers, and three different interface conditions were chosen. The first pavement was laid without interface treatment and the others with two different types of emulsion. Fourteen laboratories from 11 countries participated in this study and carried out shear or torque tests on 1,400 cores. The maximum shear or torque load and the corresponding displacement were measured, and the shear or torque strength was calculated as a function of the following parameters: diameter, test temperature, test speed, stress applied normal to the interface and age of the specimen. The results of this study are presented in terms of precision and correlations regarding the parameters which results in useful information on asphalt pavement interlayer bond tests.

Keywords

Asphalt pavement Interface Interlayer bonding Repeatability Reproducibility Shear strength 

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Copyright information

© RILEM 2013

Authors and Affiliations

  • Francesco Canestrari
    • 1
    Email author
  • Gilda Ferrotti
    • 1
  • Xiaohu Lu
    • 2
  • Anne Millien
    • 3
  • Manfred N. Partl
    • 4
    • 5
  • Christophe Petit
    • 3
  • Annabelle Phelipot-Mardelé
    • 6
  • Herald Piber
    • 7
  • Christiane Raab
    • 4
    • 5
  1. 1.Università Politecnica delle MarcheAnconaItaly
  2. 2.Nynas ABNynäshamnSweden
  3. 3.University of LimogesEgletonsFrance
  4. 4.Empa. Swiss Federal Laboratories for Materials Science and TechnologyDuebendorfSwitzerland
  5. 5.KTHStockholmSweden
  6. 6.Université européenne de BretagneRennesFrance
  7. 7.Amt der Kärntner LandesregierungKlagenfurtAustria

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