EIFFAGE Travaux Publics


EIFFAGE Travaux Publics

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Pouget S.,EIFFAGE Travaux Publics | Sauzeat C.,University of Lyon | Benedetto H.D.,University of Lyon | Olard F.,EIFFAGE Travaux Publics
Journal of Materials in Civil Engineering | Year: 2012

The present paper deals with the energy dissipation induced by the viscous behavior of bituminous materials constituting pavement. An approach to take into account viscous properties of bituminous layers and to quantify this dissipation is explained. First, the behavior of different bituminous materials is investigated. Linear viscoelastic modeling is then proposed using a rheological model previously developed at the Civil Engineering and Buildings Department (DGCB) of the University of Lyon / ENTPE (Ecole Nationale des Travaux Publics de l'Etat). Second, this model is implemented in a finite-element code, which enables simulation of the behavior of any pavement structures under any rolling load. In this paper, these developments, previously validated for orthotropic steel bridge and mix surfacing structures, are applied on a classical French pavement structure. In addition, the calculation of energy dissipation due to the viscous properties of the bituminous materials is allowed. Then an estimation of corresponding fuel consumption excess is given considering a 40-ton truck for different temperatures and speeds. The influence of the base course thickness is investigated as well. The simulation results show that energy dissipation in bituminous pavement due to the rolling weight of the considered 40-ton truck may induce a fuel consumption excess of a few percents age points in very unfavorable climatic conditions. © 2012 American Society of Civil Engineers.

Pouget S.,EIFFAGE Travaux Publics | Sauzeat C.,University of Lyon | Di Benedetto H.,University of Lyon | Olard F.,EIFFAGE Travaux Publics
Materials and Structures/Materiaux et Constructions | Year: 2012

This paper deals with the influence of a bituminous mix surfacing on the orthotropic deck bridges. These researches are part of a French national project "Orthoplus", which is briefly introduced. The approach to take into account the surfacing and to develop calculation tools is explained. First the behavior of the different bituminous constituent materials is investigated. A linear visco-elastic modeling is proposed with a rheological model, previously developed at the Civil Engineering and Buildings Department ("DGCB") of University of Lyon/ENTPE. This model was implemented in a Finite Elements code, which enables the simulation of any orthotropic structures. In order to validate these developments, two orthotropic structures are studied, including the highest bridge in the world, the Millau Viaduct (France). In situ measurements were especially carried out on the Millau Viaduct. The analysis is also performed on the French five-point bending fatigue test used at the EIFFAGE Travaux Publics research center in parallel to the construction, in 2004, of the Millau Viaduct. Focus is made on comparisons between experimental data and simulations results. © RILEM 2011.

Aubert J.E.,CNRS Materials and Construction Durability Laboratory | Segui P.,CNRS Materials and Construction Durability Laboratory | Husson B.,CNRS Materials and Construction Durability Laboratory | Measson M.,Eiffage Travaux Publics
Cement and Concrete Composites | Year: 2012

This paper presents an original method developed to quantify the reactivity of mineral additions based on the measurement of the lime (CaO) and gypsum (CaSO 4, 2H 2O) consumed by mineral additions in a paste. Three mineral additions were tested: a Siliceous Filler (SF), a natural pozzolan (Poz) and a Wastepaper Sludge Ash (WSA). The results obtained on SF, considered as a reference, show the efficiency of this method. Its application to Poz and WSA permits the quantity of lime and gypsum consumed by these additions to be evaluated and, thus, the amount of each component to be optimized in Hydraulic Road Binders. © 2012 Elsevier Ltd. All rights reserved.

Olard F.,EIFFAGE Travaux Publics
Road Materials and Pavement Design | Year: 2012

Aggregate packing concepts developed in the field of high-performance cement concretes, initially by Caquot (1937) then by contemporary researchers since the 1970s, were transposed to the field of asphalt concretes. These concepts, associated with the use of the gyratory compactor on aggregates only, enabled the development of a new laboratory design procedure of dense high-modulus asphalt concretes. These mixes are characterized by single or double gap-graded curves, great coarse aggregate interlock and no need for low penetration grade bitumens to fulfil the European EME2 specification requirements, in particular the 14,000 MPa stiffness modulus value at 15°C. In addition, the use of polymer modified binders (PMBs), at a content of about 4% up to 4.5%, combined with such an optimized aggregate packing leads to the design of the so-called high-performance asphalt concretes (HPAs) characterized by great compactability, very high stiffness modulus and high fatigue resistance in a single formulation, allowing for reduced pavement thickness and increased longevity. Moreover, the proposed mix design and the 4-4.5% binder content makes PMBs use affordable in base courses. Laboratory assessment of such materials consisted in the evaluation of compactability, moisture resistance, rutting resistance at 60°C, complex stiffness modulus at 15°C and fatigue resistance at 10°C. Apart from these results, the paper also addresses the successful application of this new material on different job sites, located mainly in France. The proposed HPA material may be potentially considered as a relevant solution for sustainable long life pavements that do not deteriorate structurally, needing only timely surface maintenance. © 2012 Taylor & Francis.

Olard F.,EIFFAGE Travaux Publics | Perraton D.,University of Québec
Road Materials and Pavement Design | Year: 2010

In the framework of a partnership between the European EIFFAGE Travaux Publics Group and the Ecole de Technologie Supérieure (ETS) from Montreal (Québec), some basic concepts associated with granular combinations and aggregate packing characteristics enabled the development and design of high-performance self-blocking asphalt concretes. The aggregate packing methods first developed in the field of highperformance cement concretes were successfully transposed to the field of asphalt concretes. Laboratory assessment in both laboratories of the ETS and EIFFAGE Travaux Publics consisted in the evaluation of the compacting ability using the French gyratory shear compactor (GSC), the resistance to moisture using the so-called Duriez test, the resistance to rutting thanks to the French wheel tracking tester at 60°C, the secant stiffness modulus at 15°C and the fatigue resistance at 10°C. The paper concludes that the grading analysis concepts allow the design engineer new insights into the structure of aggregates. The proposed principles can be used to develop more specific guidelines for aggregate structure selection of high-performance asphalt concretes. © 2010 Lavoisier, Paris.

Pouget S.,EIFFAGE Travaux Publics | Loup F.,EIFFAGE Travaux Publics
Road Materials and Pavement Design | Year: 2013

The objective of the presented study is to develop an approach to assess the linear viscoelastic (LVE) properties and the low-temperature behaviour during thermal ageing of semi-coarse asphalt concrete (SCAC) containing bio-binders. The investigation is part of a wider ongoing research project in EIFFAGE Travaux Publics Research Center. Tension/compression complex modulus tests, direct tensile strength tests at low temperatures and thermal stress-restrained specimen tests were performed on SCAC, containing three different clear binders. The first one is a reference petroleum-based clear binder, the two others are bio-binders, manufactured from renewable raw materials and fit in with the ideas of sustainable development. The analogical LVE 2S2P1D model (2 springs, 2 parabolic elements, 1 dashpot) was used to fit experimental data for the three mixtures. This method seems to be very relevant to compare rheological properties of mixtures made with bio-binders, for which evolution of low-temperature behaviour with ageing is very discriminatory. © 2013 Copyright Taylor and Francis Group, LLC.

Eiffage Travaux Publics | Date: 2011-03-22

The invention relates to coated material for the base layer of road pavement, made up of aggregate coated with a hydrocarbon binder, wherein the aggregate is more than 95 wt % of the coated material; wherein the aggregate includes a granular structure, which includes a plurality of granular fractions d/D; one intermediate fraction of which is less than 15% of the granules; wherein the hydrocarbon binder is less than 5 wt % of the coated material; wherein the coated material includes, after compacting, a void fraction of less than 8%; wherein the hydrocarbon binder is a hydrocarbon binder modified by adding polymers or oil, or modified by foaming or by emulsion, by means of which the modulus of rigidity of the coated material, once compacted, is higher than 9000 MPa.

Eiffage Travaux Publics | Date: 2013-12-03

Disclosed is a bituminous composition in the form of granules, each granule including a core and a coating and having a mass for approximately one hundred particles of from 0.5 g to 2 g, the core including from 40 wt. % to 60 wt. % of a binder matrix; from 30 wt. % to 40 wt. % of a polymer; from 4 wt. % to 6 wt. % of a compatibilizing agent; and from 2 wt. % to 15 wt. % of an anti-adhesive filler; and the coating including an anti-sticking agent. The invention relates also to a method for preparing the composition, and to the use thereof in bitumen plants.

Eiffage Travaux Publics and National Graduate School of Chemistry, Rennes | Date: 2010-04-29

The invention relates to surfactant compositions made from esters or amides of the betaine glycine, produced by reaction of the glycine betaine with a sulphonic acid and an alcohol or a fatty-chain amine derived from vegetable oils. The invention further relates to a cosmetic comprising said surfactant composition, in particular, liquid soap, bath foam, shower gel or shampoo.

The present invention relates to a granule comprising:

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