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1. Design of reinforced pavements with glass fiber grids: from laboratory evaluation of the fatigue life to accelerated full-scale test

Author

Pierre Hornych, Armelle Chabot, Eric Godard, Cyrille Chazallon, Laurent Brissaud, Yves Le Gal, Daniel Doligez, Mai Lan Nguyen, Medhi Sahli, Georg Koval, Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (MAST-LAMES ), Université Gustave Eiffel, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), 6D solutions, parent, Colas [Magny-les-Hameaux], COLAS, Chabot, A., Hornych, P., Harvey, J.T., Loria-Salazar, L.G. (Eds.), ANR-14-CE22-0019,SolDuGri,Pour une solution durable du renforcement des infrastructures par grilles en fibre de verre(2014), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Design, business.industry, Glass fiber, 0211 other engineering and technologies, 02 engineering and technology, Structural engineering, Bending, [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], Grid, Geogrid, Asphalt concrete, [SPI.GCIV.IT]Engineering Sciences [physics]/Civil Engineering/Infrastructures de transport, 020303 mechanical engineering & transports, 0203 mechanical engineering, Asphalt, 021105 building & construction, Ultimate tensile strength, APT, business, Damage evaluation, Beam (structure)
Abstract

International audience; In this paper we present the results of the national French project SolDuGri dealing with pavement reinforcement by glass fiber grids. In this project, an accelerated pavements test (APT) was performed on 6 pavement sections to evaluate the in situ performance of the reinforcement on their lifetime. The tests consisted in building test sections with four different types of grids, and two different compacted asphalt con-crete layers above (hot mix asphalt and warm mix asphalt). A total number of 2.2 mil-lion of 65 kN dual wheel loads was applied on these pavement sections and their per-formance was evaluated using in situ instrumentation, pavement monitoring tests and laboratory tests on recovered specimens. In parallel and in addition to static debond-ing tests, four points bending (4PB) fatigue tests were carried out in the laboratory on reinforced and non-reinforced beams. Two reference glass fiber grids were used, one with a high tensile strength of 100 kN/m and one with a lower tensile strength of 50 kN/m. Laboratory fatigue tests were performed with 2 positions of the rein-forcement in the beams to evaluate the effect of reinforcement for any position of the grid in the beam. Based on the results of the 4PB fatigue tests, a methodology is proposed to evaluate the lifetime of the full-scale test sections, and the predictions are compared with the results of the APT experiment showing good agreement.

Published
2022
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2. Development of a rational design procedure based on fatigue characterisation and environmental evaluations of asphalt pavement reinforced with glass fibre grid

Author

Mehdi Sahli, Cyrille Chazallon, Saida Mouhoubi, X. Q. Le, Daniel Doligez, M. L. Nguyen, Pierre Hornych, Eric Godard, M. Dauvergne, Laurence Lumiere, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), and Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
050210 logistics & transportation, Engineering, business.industry, 05 social sciences, Glass fiber, 0211 other engineering and technologies, 02 engineering and technology, Grid, Civil engineering, Asphalt concrete, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, Asphalt pavement, Work (electrical), 021105 building & construction, 0502 economics and business, business, Reinforcement, Life-cycle assessment, Civil and Structural Engineering
Abstract

The work presented in this paper is part of an interdisciplinary research project named SolDuGri dealing with the reinforcement of asphalt concrete pavements using glass fibre grids. We present in ...

Published
2021
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3. Laboratory and in situ damage evaluation of geogrid used in asphalt concrete pavement

Author

Pierre Hornych, Eric Godard, Laurent Brissaud, Saida Mouhoubi, Daniel Doligez, Y. Le Gal, Cyrille Chazallon, Mai Lan Nguyen, Julien Van Rompu, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
In situ, Asphalt concrete, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, business.industry, 021105 building & construction, 0211 other engineering and technologies, Environmental science, Geotechnical engineering, 02 engineering and technology, business, 021101 geological & geomatics engineering, Geogrid
Published
2020
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4. Control of poultry contamination in chlordecone-contaminated areas of the French West Indies

Author

Cyril Feidt, Stefan Jurjanz, Florence Clostre, Agnès Fournier, Eric Godard, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Agence Régionale de la Santé (ARS)

Subjects
Insecticides, Maximum Residue Limit, Health, Toxicology and Mutagenesis, West Indies, 010501 environmental sciences, Biology, 01 natural sciences, Poultry, Toxicology, Soil contamination, Abdominal fat, Environmental Chemistry, Animals, Soil Pollutants, Egg, 0105 earth and related environmental sciences, West indies, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Topsoil, SOIL EXPOSURE, General Medicine, Rearing practices, Contamination, Pollution, Chlordecone
Abstract

International audience; The consumption of private hold poultry foodstuffs, escaping of official maximum residue limit (MRL) controls in the commercial foodstuff, is an important exposure way for the local populations to chlordecone on the French West Indies. Therefore, chlordecone contamination of different tissues in 42 birds from 32 private holders was determined depending on the contamination of the soil of the outside plot but also surveying the rearing practices of these holders of both islands. Chlordecone contents in tissues increased rapidly with this of the topsoil of the site. The most sensitive tissues to chlordecone presence were egg yolk and liver, followed by abdominal fat and finally leg tissue. The rearing practices varied between the surveyed private holders of both islands. Nevertheless, practices for the distribution of feed and water as well as covering of soil were hardly protective, what would increase the exposure risk of these birds to this potentially present soil-bound contaminant. Although depuration of birds seems possible, the ongoing modelization of the necessary time to meet MRL thresholds indicates that such time lapse seems hardly compatible with acceptable delays for private holders. Therefore, very protective rearing practices are the main way to obtain poultry foodstuffs compliant to MRL, what seems possible if the topsoil is contaminated at less than 0.1 mg kg(-1) and perhaps up to 0.5 mg kg(-1) if protective practices vis-a-vis of soil exposure are very strict. Nevertheless, a higher contamination of the topsoil seems not compatible with compliant poultry foodstuffs.

Published
2020
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5. For Sustainable Reinforcements of Infrastructures with Coated Glass Fiber Grids

Author

Daniel Doligez, Cyrille Chazalon, Hervé Pelletier, Eric Godard, Pierre Hornych, Mai Lan Nguyen, Armelle Chabot, Laurence Lumiere, Maissa Gharbi, 6D solutions, parent, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA), CST COLAS, Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Département Matériaux et Structures (IFSTTAR/MAST), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Paris-Est, Département Aménagement, Mobilités et Environnement (IFSTTAR/AME), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université de Lyon-Communauté Université Paris-Est-PRES Université Nantes Angers Le Mans (UNAM), Chabot, Armelle, École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université de Lyon-PRES Université Nantes Angers Le Mans (UNAM)-Communauté Université Paris-Est

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], [PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], fatigue, recycling, [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], bond, damage, Reinforcement
Abstract

International audience; The road maintenance is a shared subject of concern worldwide and needs a substantial investment. The use of glass fiber grids, for the reinforcement of bituminous pavements and the fight against the rise of cracks, is a solution used successfully and in full development for which more and more examples show very good performance after monitoring roads for many years. The SolDuGri ANR project brings together French companies, Colas, 6D Solutions and Epsilon and public researchers ICUBE/INSA, ICS, the French state laboratory IFSTTAR in order to contribute to the optimization of the choice and the use of these grids for a better efficiency. This article presents the outline of the project and the first results obtained which consist in the study and the modelling of:-The in situ damage of the grids. The mechanical properties (monotonic, elastic modulus, fatigue) of the grids, from a full scale test section, have been studied.-The effect of their presence on the bonding with the asphalt layers. Different tests characterizing the bonding and crack propagation at the interface have been developed.-The IFSTTAR fatigue test track. A full scale test with 6 different sections of grid-reinforced pavement and its modelling have been performed and modelled. Beside these tests, 4 points bending fatigue tests are launched to compare their results with the fatigue test track ones.-The recycling possibilities and the environmental influences of such products. Life cycle assessment analyses have been performed and compared to asphalt concrete based solution. All these results will help these partners to propose recommendations for a better use of glass fiber grids and a design criterion of geogrid-reinforced pavement.

Published
2019

6. In situ damage evaluation of geogrid used in asphalt concrete pavement

Author

Pierre Hornych, Eric Godard, Laurent Brissaud, Daniel Doligez, Imad L. Al-Qadi, Andreas Loizos, Tom Scarpas, Cyrille Chazallon, T. Nguyen, Mai Lan Nguyen, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, In situ, business.industry, asphalt concrete pavement, 0211 other engineering and technologies, 02 engineering and technology, Geogrid, damage evaluation, Asphalt concrete, 020303 mechanical engineering & transports, 0203 mechanical engineering, geogrid, 11. Sustainability, 021105 building & construction, Environmental science, Geotechnical engineering, business
Abstract

International audience; In this paper we present the first results of the national French project SolDuGri dealing with pavement reinforcement by geogrids. In this project, full scale tests have been performed to evaluate the in situ damage of geogrids in asphalt concrete pavements. The tests consisted in building test sections with four different types of geogrids, and two different compacted asphalt concrete layers above. After construction, the geogrids have been recovered from different locations on the field sections, where they had been subjected to compaction only, or also to construction traffic, and their residual mechanical properties have been evaluated in the laboratory.

Published
2017
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7. Analysis of the Draft European Standard on Interlayer Bonding and Understanding of the Influencing Factors

Author

Eric Godard, Anne Dony, Bernard Yvinec, and Imade Koutiri

Subjects
Engineering, Asphalt, business.industry, Hull, Bond, Torque, Direct shear test, Structural engineering, Test method, business, Tensile testing, Test (assessment)
Abstract

The pavement lifetime depends in particular on the presence and quality of the tack coat at the interfaces. Various methods are proposed in the draft European project 12697-48:2014. The USIRF, Professional Union of the French Road Industries, by means of two internships (2012–2014) supervised by the ESTP and ENSAM, two French engineering schools, suggested analyzing the relevance of the tests of the draft standard, by realizing a literature review but also a laboratory work. The use of experimental design relieved the tests number. The tests were conducted within the Scientific Campus of Colas on bi-layer cores. The pavement structure was made up of two asphalt layers bonded with a tack coat (French BBSG 0/10 and GB 0/14). Five main factors were taken into account in experimental design: temperature, loading rate, density of the two layers, and type of emulsion, with 2 interactions. The three principal tests methods proposed by the draft standard were applied: Torque Bond Test (TBT), Shear Bond Test (SBT), Tensile Adhesion Test (TAT). The results turn out complementary between them, even sometimes contradictory, with not always the same evolution. Consequently, we have numerous questioning on the relevance of the tests proposed by the draft standard: can we select one and which? Besides, we have noticed feasibility and security problems on the manual Torque bond test described by the standard. In addition, mechanical Torque bond tests were led, with more reliable results.

Published
2016
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8. Liquid-phase hydrogenation of maleic anhydride over Pd–Sn/SiO2

Author

Seong Moon Jung, Sang Yun Jung, Kwang-Cheon Park, Jung Uk Choi, and Eric Godard

Subjects
Inorganic chemistry, chemistry.chemical_element, Maleic anhydride, General Chemistry, Heterogeneous catalysis, Catalysis, chemistry.chemical_compound, Adsorption, chemistry, Transition metal, Polymer chemistry, medicine, Carbon monoxide, Activated carbon, medicine.drug, Palladium
Abstract

Pd and Pd–Sn supported on SiO2 and active carbon were prepared and tested as catalysts in the hydrogenation of maleic anhydride. Particularly Pd–Sn/SiO2 was active and selective in the hydrogenation of maleic anhydride to γ-butyrolactone, and showed a resistance to the deactivation. The results of XPS and CO adsorption evidenced that the catalytic performance of Pd–Sn/SiO2 was related to the modification of electronic configuration of Pd due to the effective interaction between Pd and Sn.

Published
2003
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9. Liquid-phase hydrogenation of maleic anhydride over Pd/SiO2: effect of tin on catalytic activity and deactivation

Author

Kwang-Cheon Park, Sang Yun Jung, Seong Moon Jung, Eric Godard, and Jung Uk Choi

Subjects
Process Chemistry and Technology, Inorganic chemistry, Succinic anhydride, chemistry.chemical_element, Maleic anhydride, Photochemistry, Heterogeneous catalysis, Catalysis, chemistry.chemical_compound, Adsorption, Polymerization, chemistry, Physical and Theoretical Chemistry, Tin, Bimetallic strip
Abstract

The promotional effects of Sn on Pd/SiO 2 have been investigated by the comparison of Pd/SiO 2 and Pd-Sn/SiO 2 activity in the hydrogenation of maleic anhydride and succinic anhydride to γ-butyrolactone, and XPS measurement. When reduced at 200 °C, both catalysts showed a strong dependence on the reactants, and the addition of tin led to an increase of γ-butyrolactone yield. When reduction temperature was increased to 350 °C, however, the influence of the reactants in the activity disappeared in the case of Pd-Sn/SiO 2 . The disappearance of the feed effect may be suggested to be due to a decrease of the adsorption strength of maleic anhydride on active sites induced the formation of bimetallic Pd–Sn sites. A decrease of the deactivation rate found on Pd-Sn/SiO 2 can also be explained by the decreased rate of polymerization due to the diminution of the adsorption strength of maleic anhydride on Pd–Sn sites. As a result, it is proposed that Pd-Sn/SiO 2 catalyst can be an effective one-step catalyst for hydrogenation of maleic anhydride to γ-butyrolactone.

Published
2003
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10. Dynamic phenomena and catalytic reactivities of oxide surfaces

Author

Patricio Ruiz, Eric Godard, H.M. Abdel Dayem, and Eric M. Gaigneaux

Subjects
Work (thermodynamics), Reaction mechanism, Process Chemistry and Technology, Inorganic chemistry, Oxide, Heterogeneous catalysis, Catalysis, Propene, chemistry.chemical_compound, Catalytic oxidation, chemistry, Chemical physics, Stoichiometry
Abstract

Oxide catalysts undergo numerous dynamic phenomena at their surfaces under the conditions used for selective oxidation of hydrocarbons. This dynamic behavior influences catalytic performances and should thus be taken carefully into account in the understanding of the exact state of catalysts during the reaction and of phenomena like deactivations, synergetic effects, etc. This contribution reports examples in which dynamic behaviors of oxide surfaces under oxidation conditions dramatically dictate performances. It is concluded that the crucial key to maximize performances is to stabilize catalytic surfaces in slightly reduced suboxidic states. Such states allow catalytic oxidation cycles to proceed with high frequencies and favor reconstruction of catalysts and creation of active sites. Contrary, dynamic behaviors leading catalysts to more reduced or more oxidized states result in lower performances. Next to the tuning of O-2 and hydrocarbon partial pressures in the feed, adjustments of the stoichiometries and uses of the remote control mechanism and spillover oxygen appear as efficient approaches to master the dynamism of catalysts 'at work' and thus to optimize their performances. Finally, implications and perspectives of the understanding of dynamic phenomena at the surface of oxides are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.

Published
2000
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11. Consommation locale et exposition des consommateurs à la chlordécone

Author

Magalie Lesueur Jannoyer, Clostre, F., Carles, C., Béatrice TURPIN, Eric Godard, Thalmensy, G., Yves-Marie Cabidoche, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Pôle de Recherche Agro-Environnementale de la Martinique, Partenaires INRAE, Agence Régionale de la Santé (ARS), Agrosystèmes tropicaux (ASTRO), Institut National de la Recherche Agronomique (INRA), Agence Régionale de Santé de Guadeloupe (ARS Guadeloupe). GLP., and Cellule de l'InVS en région Antilles Guyane (Cire AG). FRA.

Subjects
biocontamination, [SDV.SA]Life Sciences [q-bio]/Agricultural sciences, antilles, pollution de l'eau, martinique, enquête, préparation des aliments, ipomoea batatas, indicateur de pollution, sciences du sol, fruit et légume, guadeloupe, zone tropicale, andosol, sol tropical, capacité d'absorption, risque de pollution, Caraïbes, ComputingMilieux_MISCELLANEOUS, giraumon, chlordecone, aide à la décision, composé organochloré, choix de culture, pollution du sol, niveau de contamination, Agricultural sciences, colocasia esculenta, sensibilité à la pollution, méthode, résidu de pesticide, bioaccumulation, insecticide organochlore, dioscorea, transfert de polluant, sécurité alimentaire, concombre, nitisol, contamination des aliments, persistance des pesticides, Sciences agricoles
Abstract

International audience

Published
2012

12. Contamination of some aquatic species with the organochlorine pesticide chlordecone in Martinique

Author

Eric Godard, Sophie Coat, and Gilles Bocquene

Subjects
Persistent organic pollutant, 010504 meteorology & atmospheric sciences, Ecology, Food web, 010501 environmental sciences, Aquatic Science, Biology, Pesticide, Contamination, 01 natural sciences, Caribbean Islands, 6. Clean water, W Atlantic, Aquatic organisms, 13. Climate action, Chlordecone, Bioaccumulation, Ecosystem, 14. Life underwater, Pesticides, Water pollution, Martinique, 0105 earth and related environmental sciences
Abstract

Martinique is a French overseas department whose economy relies heavily on agriculture. Organochlorine pesticides, mainly chlordecone, were used for banana cultivation to eradicate banana weevil over a period of 40 years. Chlordecone is chemically stable,and has a strong affinity for fatty tissues. It is therefore able to bioaccumulate in an- imals and thereby represent a threat to ecosystems and man. Soils from banana plantations in Martinique are heavily contaminated with chlordecone. Possible transfer of these molecules from agricultural watersheds to the aquatic en- vironment and the organisms that live in it is feared. The hypothesis that ecosystems of Martinique might be highly contaminated with this organochlorine pesticide was investigated. Chlordecone levels were measured in various fresh- water and marine species. Data show a heavy contamination of many carnivorous and detritivorous species (fish and prawns). Concentrations measured in wild or farmed tilapia are among the highest ever reported in the literature. Some coastal species (fish and lobster) were also found to be contaminated, although to a lesser extent. Given the biogeo- chemical behavior of chlordecone, the most likely route of contamination is food. Detected concentrations in marine organisms are below the tolerated limits established by authorities, however, the impact of other sources of exposure, namely, contaminated water and root vegetables, remains to be investigated.

Published
2006

13. Adsorption chemistry of sulfur dioxide in hydrated Na-Y zeolite

Author

Christine E. A. Kirschhock, Eric Godard, Asima Sultana, and Johan A. Martens

Subjects
chemistry.chemical_compound, Adsorption, Chemistry, X-ray crystallography, Inorganic chemistry, chemistry.chemical_element, General Medicine, General Chemistry, Zeolite, Nitrogen oxides, Sulfur, Catalysis, Sulfur dioxide
Published
2004

14. Reversible NOx storage over Ru/Na–Y zeolite

Author

Christine E. A. Kirschhock, Moniek Tromp, Kenneth Villani, Sylvia Smeekens, Johan A. Martens, Jin Won Seo, M. DeMarco, Steven Heylen, Eric Godard, and Kristof Houthoofd

Subjects
inorganic chemicals, Inorganic chemistry, chemistry.chemical_element, General Chemistry, Catalysis, Ruthenium, Adsorption, Transition metal, chemistry, Oxidation state, Desorption, cardiovascular system, Zeolite, NOx
Abstract

Ruthenium loaded Na–Y zeolite was found to be an efficient adsorbent for achieving NOx adsorption–desorption cycles comprising adsorption under oxidizing and desorption under reducing conditions. The speciation of ruthenium was investigated using TEM, EXAFS, 99Ru Mossbauer spectroscopy and XRD in combination with Rietveld refinement. The sodium cation siting was monitored using 23Na MAS NMR. Characterization of the Ru/Na–Y adsorbent in NOx saturated and regenerated state revealed a unique cooperation of supported ruthenium nano metal particles and isolated Ru atoms in framework cavities affecting the sodium cations. Supported ruthenium nanoparticles assume a catalytic role in NO oxidation. Ruthenium atoms in framework cavities undergo switching of oxidation state during adsorption–desorption cycles. It triggers reversible sodium cation migrations from coordination with the framework in the regenerated state to coordination in sodium–water networks in supercages providing adsorption sites for NOx during adsorption. The peculiar ruthenium organization is naturally obtained upon lean–rich cycling. Ru/Na–Y adsorbent is insensitive to SOx and to the presence of CO during reductive regeneration.

Published
2010
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16. Contamination of some aquatic species with the organochlorine pesticide chlordecone in Martinique.

Author

Sophie Coat, Gilles Bocquen?, and Eric Godard

Subjects
CHLORDECONE, INSECTICIDES, BIOTIC communities, MARINE biology
Abstract

Martinique is a French overseas department whose economy relies heavily on agriculture. Organochlorine pesticides, mainly chlordecone, were used for banana cultivation to eradicate banana weevil over a period of 40 years. Chlordecone is chemically stable,and has a strong affinity for fatty tissues. It is therefore able to bioaccumulate in animals and thereby represent a threat to ecosystems and man. Soils from banana plantations in Martinique are heavily contaminated with chlordecone. Possible transfer of these molecules from agricultural watersheds to the aquatic environment and the organisms that live in it is feared. The hypothesis that ecosystems of Martinique might be highly contaminated with this organochlorine pesticide was investigated. Chlordecone levels were measured in various freshwater and marine species. Data show a heavy contamination of many carnivorous and detritivorous species (fish and prawns). Concentrations measured in wild or farmed tilapia are among the highest ever reported in the literature. Some coastal species (fish and lobster) were also found to be contaminated, although to a lesser extent. Given the biogeochemical behavior of chlordecone, the most likely route of contamination is food. Detected concentrations in marine organisms are below the tolerated limits established by authorities, however, the impact of other sources of exposure, namely, contaminated water and root vegetables, remains to be investigated. [ABSTRACT FROM AUTHOR]

Published
2006

17. Pour une solution durable du renforcement des infrastructures par grilles en fibre de verre

Author

Cyrille Chazallon, Eric Godard, Daniel Doligez, Maïssa Gharbi, Pierre Hornych, Armelle Chabot, Mai Lan Nguyen, Hervé Pelletier, Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA), Colas [Magny-les-Hameaux], COLAS, 6D solutions, parent, Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (IFSTTAR/MAST/LAMES), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), and RP2-J14155 ANR SOLDUGRI (10/12/2014 - 31/12/2099)

Subjects
RENFORCEMENT DE LA CHAUSSEE, CHAUSSEE (CORPS DE), CHAUSSEE, MATERIAU, FIBRE, ROUTE, RENFORCEMENT (CHAUSSEE), ROAD PAVEMENTS, CHAUSSEE ROUTIERE, GLASS FIBER GRIDS, FIBRE DE VERRE, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

12ème Rencontres Géosynthétiques , NANCY, FRANCE, 11-/03/2019 - 13/03/2019; The use of glass fiber grids for the reinforcement of bituminous pavements and the fight against the rise of cracks is a solution used successfully and in full development. The SolDuGri ANR project brings together industrialists and public researchers in order to contribute to the optimization of the choice and the use of these grids for a better efficiency. This article presents the outline of the project and the first results obtained which consist in the study and the modeling of the in situ damage of the grids, the effect of their presence on the bonding with the asphalt layers.; L'emploi de grilles de verre pour le renforcement des chaussées bitumineuses et la lutte contre la remontée des fissures est une solution employée avec succès et en plein développement. Le Projet ANR SolDuGri rassemble des industriels et des chercheurs publics dans le but de contribuer à l'optimisation du choix et de l'utilisation de ces grilles pour une meilleure efficacité. Cet article présente les grandes lignes du projet et les premiers résultats obtenus qui consistent en l'étude et la modélisation de l'endommagement à la mise en oeuvre des grilles, de l'effet de leur présence sur le collage des couches d'enrobés bitumineux.

18. Projet Soldugri: Avancement de l'étude du renforcement des enrobés bitumeux par des grilles de verre

Author

Eric Godard, Cyrille Chazallon, Mai Lan Nguyen, Armelle Chabot, Pierre Hornych, Daniel Doligez, Herve Pelletier, Michel Dauvergne, Laurence Lumiere, Laurent Brissaud, Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (IFSTTAR/MAST/LAMES), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Département Matériaux et Structures (IFSTTAR/MAST), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Paris-Est, 6D solutions, parent, and ANR 'SolDuGri' (ANR-14-CE22-0019)

Subjects
renforcement chaussée, essais accélérés, accélérateur de traffic routier, Construction - Matériaux, [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], collage structural
Abstract

National audience; Le projet ANR SolDuGri, qui a déjà fait l’objet d’un article dans la RGRA en 2017, a enregistré bon nombre d’avancées, notamment sur le comportement des grilles de verre lors de la mise en œuvre, leur collage, leur endommagement. Différents produits ont été testés sur le manège de fatigue de l'Ifsttar à Nantes. Cette expérimentation livre ses premiers résultats.

19. Projet ANR SolDuGri : Pour une solution durable du renforcement des infrastructures par grilles en fibre de verres

Author

Eric Godard, Cyrille Chazallon, Pierre Hornych, Armelle Chabot, Mai Lan Nguyen, Daniel Doligez, Hervé Pelletier, Colas [Magny-les-Hameaux], COLAS, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (IFSTTAR/MAST/LAMES), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), 6D solutions, parent, Institut National des Sciences Appliquées (INSA), RP2-J14155 ANR SOLDUGRI (10/12/2014 - 31/12/2099), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and ANR-14-CE22-0019,SolDuGri,Pour une solution durable du renforcement des infrastructures par grilles en fibre de verre(2014)

Subjects
[SPI]Engineering Sciences [physics], CHAUSSEE, RENFORCEMENT, GRILLE DE VERRE, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

National audience; Pour renforcer les chaussées bitumineuses et lutter contre la remontée des fissures, l'utilisation des grilles en fibre de verre est une solution en plein développement. Le projet SolDuGri rassemble des industriels et des chercheurs publics afin de contribuer à l'optimisation du choix et de l'utilisation de ces grilles. Cet article présente les grandes lignes du projet et les premiers résultats obtenus.

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