Search results for "RECYCLAGE"

Interactions surface continentale/atmosphère : l'expérience HAPEX-Sahel

1994

L'évolution saisonnière des termes du bilan radiatif, du bilan d'énergie et la production primaire d'une savane humide d'Afrique de l'Ouest (Lamto, Côte d'Ivoire) a été suivie dans le cadre du programme SAvanes à Long Terme (SALT). Ces données ont permis de développer un modèle de simulation des échanges surface/atmosphère en savane humide, basé sur les relations fonctionnelles existant entre la production et la phénologie de la savane d'une part, et les bilans d'énergie et hydrique de ce type de surface d'autre part. Ce modèle est issu du couplage de deux sous-modèles fonctionnant au pas de temps journalier et utilisant des variables climatiques standard en entrée : le modèle de bilan d'én…

Fossilized Bronze, Invisible Bronze

2023

The systematic field surveys carried out since the beginning of the 2000s around the fortified site of the Camp du Château at Salins-les-Bains (Jura, France) have led to the discovery of 74 Bronze Age hoards, a density rarely observed in France. Dating from the beginning of the Middle Bronze Age to the Late Bronze Age, this dataset is unique as it provides detailed information on the composition of the hoards and their distribution within a defined territorial and chronological framework.These hoards are mainly made up of fragments, as around 90% of the objects are broken. This is deliberate and seems to correspond to a codified ritual of destruction which could be related to the notion of …

Récupération et recyclage sur la villa de Burgille (25) : l'exemple du plomb

2010

Effect of two novel bio-based rejuvenators on the performance of 50% RAP mixes - a statistical study on the complex modulus of asphalt binders and as…

2019

An experimental study was conducted to evaluate the effectiveness of two bio-additives as rejuvenators on the properties of asphalt mixtures containing 50% RAP and their binder constituents containing 37% RAP binder. Before mixing, the rejuvenators were blended with fresh bitumen and the extracted and recovered RAP bitumen, and changes in the rheological properties of the binders were assessed using performance grading (PG) criteria. The results showed that both rejuvenators could improve the low-temperature performance of the aged RAP binder and restore its low-temperature properties. Master curves for the unaged, RTFO-aged, and PAV aged blends were constructed using both the Christensen-A…

IL RUOLO DEL PATRIMONIO NEL PROGETTO URBANO MARSIGLIA E TUNISI, CITTÁ DEL MEDITERRANEO

La ricerca si occupa del rapporto tra le nuove modalità di trasformazione della città mediterranea e le nuove strategie di rigenerazione e valorizzazione del patrimonio materiale e immateriale. Comprendere qual è il ruolo del patrimonio nel processo di trasformazione e crescita della città mediterranea, attraverso la pratica del progetto urbano, è la questione principale della tesi, che si inserisce nel campo delle ricerche sulle modalità di trasformazione della città contemporanea. La ricerca si interroga, inoltre, su quale sia il rapporto che oggi lega il patrimonio e la sviluppo sostenibile, ambiti non più antitetici ma complementari, in una costruzione reciproca di simbologie e differen…

Life cycle assessment of low temperature asphalt mixtures for road pavement surfaces: A comparative analysis

2018

The increasing fuel consumption demand, the accelerated pressure imposed by the depletion of 5 scarce raw materials and the urgent environmental protection requirements are forcing the change of 6 pavement industry and academia community’s research endeavors towards the development of low 7 emissions road paving technologies able to significantly reduce mixing and compaction temperature as 8 well as the consumption of virgin raw materials. One set of relatively recent technologies in the field of 9 pavement materials that aims at addressing those concerns are the warm mix asphalt (WMA). In fact, 10 they have the potential to allow the reduction of energy consumption and airborne emissions d…

Développement d'un procédé électrochimique pour le recyclage du néodyme à partir de déchets électroniques

2018

Neodymium belongs to the lanthanide’s serie of the period system and is the key component of the permanent magnets Nd2Fe14B which are implemented in electronic devices and “green” technologies like wind turbines or electric cars and bicycles. Nowadays, only one percent of the neodymium in electronic scraps is recycled. Due to the geopolitical considerations and a strong increase of the use of permanent magnets, there is an impoverishment of the raw material resources leading to an instable market.Since some decades, few recycling processes have been developed on a lab scale without any upscaling to the industrial scale. The existing processes have several drawbacks like multiple steps to ob…

Elaboration et caractérisation d’une structure composite (sable et déchets plastiques recyclés) : Amélioration de la résistance par des charges en ar…

2018

This project aims at conceiving(designing) one paves with plastic waste got back in the discharges and with mixture of sand and gravel. This pavement that must be of use to the realization of pavements and public highways, must thus be capable of answering the technical conditions of its use. However, the fabrication method and the used material(equipment) must be rather simple to allow its fast handling by little qualified workers and a low(weak) production cost to be economically competitive. Pavements will thus be tested to identify their performance at the same time mechanical and physical then used on life-size to understand(include) their ageing because of their wear. Finally, an equi…

Implementation and optimization of the properties of a sandwich structure in biobased materials (fibres and Hemp wood) with an expanded polystyrene m…

2017

Due to the rapidly improving functionality of building materials, and increasingly complicated human resource management issues, the traditional cement-based building materials of the past are becoming less and less desirable.These outdated materials are being replaced by new structures of wall that better optimize choices of materials and their layouts. In this study, we propose a multi-function structure to be the unit of a typical wall (individual house), which can be produced via the use of inexpensive materials and classic manufacturing processes. To achieve this, we chose the renewable agricultural source of the hemp plant (hemp yarns and hemp shive particles), along with recycled exp…

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders

2017

The use of high Reclaimed Asphalt (RA) content mixtures together with binders produced from renewable resources (biobinders) is one of the current challenges in pavement engineering research. On the one hand, RA has been used for decades, but there are still some concerns about its performance, especially when high contents are used (>30%). On the other hand, biobinders are relatively new materials, which have to be deeply characterised and studied in order to develop good practices for their use. In this paper, linear viscoelastic properties of biobinders and bio-mixtures manufactured with high RA content and biobinders are analysed and discussed. High-modulus mixtures with 50% RA were…