Mechanical Testing of Interlayer Bonding in Asphalt Pavements

Canestrari, Francesco; Ferrotti, Gilda; Lu, Xionggang; Millien, Anne; Partl, Manfred N.; Petit, Christophe; Phelipot-Mardelé, Annabelle; Piber, H; Raab, Christiane

doi:10.1007/978-94-007-5104-0_6

Cited by 62 publications

(38 citation statements)

References 21 publications

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“…The comparison of these values with the parameters a and b determined in this investigation (Fig. 2) shows that EMPA and IBDiM results, (Canestrari et al 2012). The peak envelopes of the interlayer shear strength obtained for the three interface types and for the three laboratories that investigated different normal stresses are presented in Fig.…”

Section: Results and Analysismentioning

confidence: 90%

“…The correlation between interlayer shear strength and temperature can also be represented in a semi-logarithmic plane and can be described with a relationship obtained in a previous RILEM research project on interlayer bonding of asphalt pavements (Canestrari et al 2012): …”

Section: Results and Analysismentioning

confidence: 99%

“…However, the presence of reinforcements at the interface can cause an interlayer de-bonding effect (Brown et al 2001;Canestrari et al 2012;Vanelstraete et al 1997;Zamora-Barraza et al 2010) that could affect the overall pavement behaviour. Both quasi-static (Canestrari et al 2013) and dynamic (Brown et al 2001) shear tests performed on double-layered specimens with or without the application of a constant normal stress showed that a general shear strength decrease is observed when a reinforcement is placed at the interface of asphalt concrete layers.…”

Section: Introductionmentioning

confidence: 97%

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Inter-laboratory Shear Evaluation of Reinforced Bituminous Interfaces

et al. 2015

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Over the last decades, the use of grids between asphalt layers has been gaining interest. Several test methods have been proposed in order to simulate the complex mechanical behavior of reinforced pavements and to assist practitioners in the selection of the appropriate reinforcement product. For this purpose, the Task Group 4 (Pavement Multilayer System Testing) of the RILEM technical committee TC 237-SIB (Testing and Characterization of Sustainable Innovative Bituminous Materials and Systems) organized an inter-laboratory experiment, constructing one trial test section to obtain double-layered asphalt pavement samples for the participating laboratories. The experiment placed two grid types (a glass fiber reinforced polymer grid and a carbon fiber/glass fiber pre-bituminised grid) between two asphalt layers, thereby creating two reinforced double-layered systems. As a control, an unreinforced interface was also realized. This paper presents the overall results of interlayer shear tests carried out by five participating laboratories using five different shear testing methodologies. The objective is to show the effect of two grid types on the shear behaviour of reinforced double-layered systems and to compare the findings which emerged from using different test devices and methods under different testing conditions (e.g. sample geometry, temperature, loading time, normal stress). Consistent and reliable results have been obtained through the various methodologies adopted. It has been observed that grid-reinforced samples provide lower interlayer shear strength compared with unreinforced samples. Glass-fiber grid system, which is of greater thickness and greater torsional stiffness, displayed less shear strength than carbon fiber/glass fiber-reinforced grid systems.

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Section: Results and Analysismentioning

confidence: 90%

Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Inter-laboratory Shear Evaluation of Reinforced Bituminous Interfaces

et al. 2015

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“…However, the application of normal stress makes the experiment much more complicated. Therefore, the direct shear test method without normal stress is the most utilized one [8][9][10][11]. Most of these tests are inspired from the Leutner shear test [12].…”

Section: Introductionmentioning

confidence: 99%

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

Nguyen

2020

Infrastructures

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The interface bond between layers plays an important role in the behavior of pavement structure. However, this aspect has not yet been adequately considered in the pavement analysis process due to the lack of advanced characterizations of actual condition. In many pavement design procedures, only completely bonded or unbounded interfaces between the layers are considered. For the purpose of the better evaluation of the asphalt pavement behavior, this work focused on its investigation taking into account the actual interface bonding condition between the asphalt layers. Based on the layered theory developed by Burmister (1943), the actual interaction between pavement layers was taken into account by introducing a horizontal shear reaction modulus which represents the interface bonding condition for a given state. The analytical solution was then implemented in a numerical program before doing forward calculations for sensitivity analysis which highlights the influence of the interface bonding conditions on the structural behaviors of asphalt pavement under a static load. Furthermore, the numerical program was applied through an original experimental case study where falling weight deflectometer (FWD) tests were carried out on two full-scale pavement structures with or without a geogrid at the interface between the asphalt layers. Backcalculations of the FWD measurements allowed determining field condition of the interface bond between the asphalt layers. The obtained values of the interface shear modulus in pavement structure with a geogrid are smaller than the ones in pavement structure without geogrid. Moreover, all of these values representing field performance are at the same order of magnitude as those from dynamic interlayer shear testing.

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“…Many studies reported that polymer-modified emulsions have the potential to improve interface bond strength significantly, followed by unmodified emulsions and nontacked interfaces (3,4,(9)(10)(11). In contrast, some studies showed that the improvement in interlayer adhesion property is not statistically significant when the performance of tacked interface is compared with the nontacked interface condition (4,12). Moreover, mechanical bonding between adjacent pavement layers is highly dependent on the characteristics of existing pavement surface before the construction of overlays.…”

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confidence: 99%

Development and Validation of a Model to Predict Interface Bonding Between Pavement Layers

Das

Mohammad

Elseifi

et al. 2018

Transportation Research Record: Journal of the Transportation R

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During the planning of overlay construction activities, a contractor and/or state agency may be interested in selecting a tack coat material and application rate that would provide adequate interface bonding at the site. The objective of this study was to develop an interface shear strength (ISS) predictive model to estimate interface bonding between the hot-mix asphalt (HMA) overlay and the underlying pavement layer. To achieve this objective, 10 field rehabilitation projects were selected in six states that included 33 in-service test sections representing different traffic and climatic conditions. The overlay construction used different types of tack coat at various residual application rates. Field cores were obtained to measure ISS using a direct shear test device, referred to as the Louisiana Interlayer Shear Strength Tester (LISST). Influencing factors to be included in the model were pavement surface type and mean texture depth, residual application rate, and characteristics of tack coat residues. The experimental data were complemented with test results from a recently completed study for model development and validation. Two types of statistical regression models (linear and nonlinear) were evaluated. Results of the analysis showed that the predicted ISS obtained from the proposed models were in good agreement with the measurements. Further, the developed nonlinear model showed better prediction accuracy than the linear model. The nonlinear model can be used effectively for optimum selections of tack coats given the project conditions. The results presented herein were part of NCHRP Project 9-40A, Field Implementation of the Louisiana Interface Shear Strength Test.

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Mechanical Testing of Interlayer Bonding in Asphalt Pavements

Cited by 62 publications

References 21 publications

Inter-laboratory Shear Evaluation of Reinforced Bituminous Interfaces

Inter-laboratory Shear Evaluation of Reinforced Bituminous Interfaces

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

Development and Validation of a Model to Predict Interface Bonding Between Pavement Layers

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