Recommendation of RILEM TC 241-MCD on interface debonding testing in pavements

Abstract

The following recommendations are based on the chapter III of a State of the Art review conducted by the Task Group 2 of the RILEM Technical Committee 241-MCD ''Mechanisms of cracking and debonding in asphalt and composite pavements'' (Petit et al in Mechanisms of cracking and debonding in asphalt and composite pavements. Chapter III of the State-of-the-Art report of the RILEM technical committee 241-MCD series, vol 28. Springer, New York, pp 103-154. ISBN 978-3-319-76848-9 2018). The recommendations mostly concern "pure" fracture mode test methods that are currently used worldwide and even standardized, while mixed mode test methods developed by few research teams have not received full attention. This paper intends to give guidance for the application and characterization of interlayer bond testing, looking at the appropriate test methods and the importance of influencing parameters.

Numerical and Experimental Investigations of Asphalt Pavement Behaviour, Taking into Account Interface Bonding Conditions

“…However, as the geogrid could delay the reflective cracking, if properly installed, it can contribute to the long-term performance of the pavement. Furthermore, one can note that the experimental K s values obtained for both pavement structures in this case study are at the same order of magnitude as those from dynamic shear tests [15,16] than from quasi-static shear tests [6,14]. This result confirms the position, as stated in [25] that dynamic tests represent better the field condition of interface bonding than static tests and hence are more suitable for characterization, modelling and design studies of the structural behaviors of pavements.…”

“…Most of these tests are inspired from the Leutner shear test [12]. With monotonic loading, they allow us to rapidly evaluate the influence of different factors on bond strength at the interfaces between pavement layers [13,14]. In parallel to these quasi-static tests, several dynamic shear tests developed recently [15,16] should lead to more reliable field performance characteristics.…”

Towards improved testing of modern asphalt pavements

“…During the last 50 years, Rilem has contributed considerably to the numerous attempts of understanding and characterizing asphalt and its binder, trying to provide a platform for international voluntary knowledge exchange and evaluation of different experimental and modelling approaches in interlaboratory comparison initiatives. Rilem has produced numerous recommendations [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], state-of-the-art reports [28][29][30][31][32][33] and conference/symposia proceedings .…”

Interlaminar Mode-I Fracture Characterization Underwater of Reinforced Bituminous Specimens

“…This condition is essential, especially when using grids inside top pavement layers. Along with rolling loads and temperature variations, the presence of water near the interface must be considered in studying debonding mechanisms [4]. To better understand the interlaminar mode I fracture behavior of pavements, Wedge Splitting Tests (WST) have been developed, whether underwater or not, for specimens extracted directly from road sections [5][6].…”