Michael BroutinFrench civil aviation technical center · Airfield pavement
Michael Broutin
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30
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Publications
Publications (30)
L'auscultation régulière de l'état des chaussées est la clé de leur bonne gestion puisqu'elle permet d'anticiper et d'optimiser les travaux d'entretien ou de réhabilitation. En particulier, l'état du collage des interfaces entre couches de matériaux est à évaluer pour comprendre le comportement mécanique de ces structures en flexion et leur durée d...
Regular pavement condition evaluation is the key to ensuring a good asset management of in-service pavements, because it allows anticipating and optimizing maintenance or rehabilitation works. In particular, interface bonding conditions between asphalt concrete layers are of major concern because in most cases, structural problems come from interfa...
Pavement layer interfaces have a major influence on pavement structure service life and bearing capacity. This study aims at understanding how interfaces behaviour can affect the pavement response in the frame of airfield pavement assessment with the Heavy Weight Deflectometer device. Based on laboratory viscoelastic characterisation of an interfac...
This paper presents a study in which an advanced constitutive model the viscoelastic behaviour of pavement layer interfaces is implemented in a pavement structure simulation. In particular, the study focuses on the effects of frequency and temperature-dependent behaviour of pavement layer interface. The airfield pavement response under Heavy Weight...
A new type of distresses, not taken into account in the frame of the French airfield flexible pavement design method, has appeared for some years on several pavement structures: this is top-down cracking, under the pass of heavy aircraft landing gears. It is actually considered in the design methods that the cracking is supposed to initiate at the...
![Fig. 1 The Ovalisation principle [5]: a) Diameter variation of the...](profile/Armelle-Chabot/publication/355154394/figure/fig1/AS:1076995580526603@1633787164970/The-Ovalisation-principle-5-a-Diameter-variation-of-the-cylindrical-cavity-under_Q320.jpg)
Non-destructive techniques (NDT) have emerged for the last decades to in-situ evaluate the pavement materials and interface conditions. These techniques turn out to be valuable tools to evaluate pavement bearing capacity, but present limitations to provide, on their own, reliable information about the interface bonding conditions. Developed in the...
The Heavy Weight Deflectometer (HWD) is a nondestructive testing device widely used for airfield pavement assessment. The HWD test consists in applying a wheel-representative load, generated by a falling mass, at the pavement surface. Deflections time histories are recorded by geophones located at several distances from the applied load. Inverse an...
Heavy weight deflectometer (HWD) backcalculated moduli for subgrade materials appear from experience to be always overestimated in comparison with commonly expected values used in design methods. This can be explained by the dynamical loading applied to the pavement whereas the tests used during the construction phase for the characterization of th...
Falling (or Heavy) Weight Deflectometer (F/HWD) is a widely used non-destructive device for pavement evaluation. The falling mass system of this device can generate a load representative of a wheel. Deflections are monitored by geophones at several distances from the loading centre. Interpretation of F/HWD deflections is classically done using a st...
The STAC (French Civil Aviation Technical Center) elaborated a methodology for flexible pavements assessment using HWD. It is described in a technical guidance, released in 2014. It emphasizes the importance of complementary operations to be performed during the survey, especially temperature measurements in the asphalt materials. Backcalculated pa...
Armed with its experience of the flexible airfield pavement testing for which an advanced dynamical method was developed and a technical guidance released in 2014, STAC took on the challenge of transposing the methodology to rigid pavements.
Usual Falling or Heavy Weight Deflectometer (F/HWD) backcalculation methods assume that pavement layers are fully bonded. In order to assess the ability of HWD testing to detect debonding of the interfaces between pavement layers, the French civil Aviation technical center (STAC) performed an HWD campaign on the circular Accelerated Pavement Testin...
The new French rational procedure for flexible airfield pavement design was recently released (2014). This method includes the consideration of a phenomenon observed in aviation that is aircraft lateral wander, corresponding to the lateral offset of aircraft from the centerline of the pavement. Little data are available regarding the characterizati...
Empirical procedures based on the CBR method for the design of flexible airfield pavements have shown many limitations in the past decades. Much effort has been made to overcome them, leading to the development of new methodologies associated with new computer programs (APSDS, FAARFIELD, PAVERS…). The French Civil Aviation Technical Center released...
This paper presents the technical guidance released in 2014 by the STAC (Service Technique de l’Aviation Civile : French Civil Aviation Technical Center), relative to Flexible Airfield Pavement Assessment using Heavy Weight Deflectometer (HWD) which aims at providing all airport technical managers with a methodology for pavement testing using HWD....
This paper presents the modeling of a multilayered structure for the purpose of simulating
the dynamic behavior of a flexible airfield pavement under the effect the loading
applied by a non-destructive pavement assessment device: the heavy weight deflectometer
(HWD). A Huet-Sayegh model is considered to describe the mechanical
behavior of bituminou...
Modeling of a multilayered structure is presented in this paper. It allows simulating the dynamic behavior of flexible airfield pavement under the effect the loading applied by a nondestructive pavement assessment device: the Heavy Weight deflectometer (HWD). A Huet-Sayegh model is considered for the mechanical behavior of the bituminous layers. Be...
The current design procedure for airfield pavements used in France has shown limitations in the past decades. This empirical-based approach does not consider correctly new material performances, temperature effects, or new complex landing gear configurations. For flexible pavements, on which this paper is focused, the empirical California Bearing R...
A dynamical finite elements modeling has been developed by the STAC (French civil Aviation technical center) to improve the analysis of the flexible pavement response under dynamical loadings, typically Heavy Weight Deflectometers (HWD) impulse loadings.
The usual analysis methods rely actually on a pseudo-static backcalculation process using the d...
This paper presents the full-scale instrumented test facility of the STAC (French civil Aviation technical center). This test site is aimed at improving the pavement behavior modeling under heavy loading. It is also a privileged tool for the assessment of pavement testing devices or methods. It actually provides on the one
hand reference structures...
Evolved from the French “déflectomètre à boulet”, the Heavy Weight Deflectometer (HWD) is today viewed worldwide as the most appropriate device to assess the bearing capacity of airport pavements. Its principle consists in applying a transient impulsive load simulating the weight effect of an aircraft rolling wheel, onto a stationary load plate pla...
Descendant du déflectomètre à boulet du Laboratoire Central des Ponts et Chaussées (LCPC), le Heavy Weight Deflectometer (HWD) est devenu aujourd'hui l'appareil de référence international pour la détermination de la portance des chaussées aéronautiques. Il est composé d'une masse tombante qui engendre à la surface de la chaussée, par l'intermédiair...
Projects
Project (1)
The development of the measurement device inspired by the ovalization system invented in the 1970s by the Laboratoires des Ponts et Chaussées, which consists of measuring the diameter variation of a core-hole in three horizontal directions (longitudinal, transverse, and 45°) during the passage of a rolling-wheel.
The main purposes of this project are to better understand interfaces mechanical behavior and evolution for research purposes and to have at our disposal an operational tool to evaluate the interface bonding condition of in-service airfield pavements.
