References of "Courard, Luc"
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See detailEvaluation du cursus  Sciences industrielles et de l’ingénieur industriel
Courard, Luc ULg

Conference given outside the academic context (2016)

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See detailMEASUREMENT OF MOISTURE DIFFUSIVITY BY INVESTIGATION OF SORPTION ISOTHERM AND MODELING MOISTURE TRANSFER OF MORTAR SUBMITED TO CONVECTIVE DRYING
Kahlerras, Loubna ULg; BELHAMRI, Azeddine; Fraikin, Laurent ULg et al

in Proceedings of The 20th International Drying Symposium (IDS 2016) (2016, August 08)

This work reports the results of experimental study concerning convective drying of cement mortar and the influence of water-to cement ratios (W/C) used for the preparation of mortar, on moisture changes ... [more ▼]

This work reports the results of experimental study concerning convective drying of cement mortar and the influence of water-to cement ratios (W/C) used for the preparation of mortar, on moisture changes. The first experimental campaign was a convective dryer; in the purpose to obtain the drying curves of mortar and the influence of water to cement ratios (W/C) on drying kinetics. A second experimental campaign aims to characterize from textural and hydric point of view, the materials, by mean of DVS (dynamic vapor sorption) In order to obtain sorption cycles and identify the moisture diffusivity coefficient of mortar. The pore size distribution is obtained from sorption cycles and completed by MIP. The contribution of each components of the microstructure to the diffusion is studied. Finally X-ray microtomography is used to measuring the moisture content in the internal structure of mortars during drying. [less ▲]

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See detailRéparation des bétons: principes, matériaux et techniques
Courard, Luc ULg

Scientific conference (2016, April 26)

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See detailEpuisement des ressources et construction durable
Courard, Luc ULg

Scientific conference (2016, April 15)

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See detailDevelopment and use of foamed recycled fibers to control shrinkage cracking of cementitious mortars
Coppola, Bartolomeo ULg; Di Maio, Luciano; Courard, Luc ULg et al

in Proceedings of the 4rd Workshop "The New Boundaries of Structural Concrete" (2016)

In this study a new class of engineered fibers were produced using end of waste materials obtained from post-consumer plastics. Taking into account the rising issue of plastic waste disposal and the ... [more ▼]

In this study a new class of engineered fibers were produced using end of waste materials obtained from post-consumer plastics. Taking into account the rising issue of plastic waste disposal and the importance of fiber/matrix adhesion for composites materials, recycled plastic fibers with improved adhesion were developed. In particular, foamed fibers presenting a rough surface and a porous morphology were obtained by a foam extrusion process using a chemical blowing agent. Fiber reinforced mortars (FRMs) were produced containing foamed fibers at three volume fractions (0.50, 1 and 2 %) and two lengths (15 and 30 mm). FRM plastic shrinkage cracking resistance was investigated: the better adhesion of foamed fibers influenced cracks propagation, reducing crack area and delaying crack openings during shrinkage. Moreover, shorter fibers are better efficient in controlling cracks length while longer fibers are able to reduce cracks width and number. [less ▲]

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See detailDetermining the reactivity of concrete aggregates for Nuclear Power Plant concrete structures
Jackiewicz-Rek, Wioletta; Piotrowski, Tomasz; Courard, Luc ULg et al

in Budowa Elektowni Jadrowych (2016), 529(9), 99-102

The authors describe the additional requirements to ensure durability of concrete related to probability of corrosion due to alkali-silica reactivity of aggregates based on French Rules for Design and ... [more ▼]

The authors describe the additional requirements to ensure durability of concrete related to probability of corrosion due to alkali-silica reactivity of aggregates based on French Rules for Design and Construction of PWR nuclear civil works RCC-CW. Since these requirements are based both on European standards and the French experience they are not fully compatible with the conditions and requirements in other countries, including Poland. In the paper the RILEM methodology and assessment according to American ASTM standards are presented as well. The article is an introduction to the discussion on adapting to Polish conditions the guidelines for the reactivity assessment of aggregate for concrete resulting from RCC-CW. [less ▲]

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See detailSpecial requirements for freeze/thaw resistance of concrete in PWR nuclear civil works
Piotrowski, Tomasz; Jackiewicz-Rek; Prochon, Piotr et al

in Budowa Elektrowni Jadrowych (2016), 529(9), 94-97

The authors describe the additional requirements to ensure freeze-thaw resistance of concrete resulting from the French Rules for Design and Construction of PWR nuclear civil works RCC-CW. Since these ... [more ▼]

The authors describe the additional requirements to ensure freeze-thaw resistance of concrete resulting from the French Rules for Design and Construction of PWR nuclear civil works RCC-CW. Since these requirements are based both on European stan dards and the French experience they are not fully compatible with the conditions and requirements in other countries, including Poland. The article seeks therefore to be an in trodu tion to the di - scussion on adapting the guidelines for the freeze-thaw resistance of concrete from RCC -CW to Po lish conditions. [less ▲]

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See detailInvestigation on the use of foamed plastic waste as natural aggregates replacement in lightweight mortar
Coppola, Bartolomeo ULg; Courard, Luc ULg; Michel, Frédéric et al

in Composites : Part B, Engineering (2016), 99

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See detailCiments ternaires à haute teneur en calcaire
Pierre, Christian; VanHamme, Géraldine; Lauch, Kim-Séang et al

Report (2016)

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See detailAmélioration des performances des recyclés en domaine routier par optimisation des unités de traitement
Van der Wielen, Audrey; Grégoire, Colette; Janssens, Benoît et al

Report (2016)

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See detailWorking Group 4 - Performances of Limestone Modified Portland Cement and Concrete
Courard, Luc ULg; Herfort, Duncan; Villagran, Yuri

in de Belie, Nele (Ed.) Supplementary Cementitious Materials (2016)

Fine limestone has been added to Portland cement for decades. This is normally achieved by “intergrinding” it with Portland cement clinker in the cement mill. Under normal operating conditions this will ... [more ▼]

Fine limestone has been added to Portland cement for decades. This is normally achieved by “intergrinding” it with Portland cement clinker in the cement mill. Under normal operating conditions this will result in a surface area of the limestone fraction of between 800 and 1100 m2/kg (depending on the grindability of the limestone) for a surface area of the clinker fraction of in the region of 400 m2/kg. Less often the limestone is ground separately and blended with Portland cement. Separate addition of limestone to concrete as a clinker replacement is not widely practiced in conventional concrete, but is used as filler for modifying the rheology of self-compacting concrete. In the early literature limestone was generally regarded as “inert filler”. For this reason it has e.g. become the main constituent in most masonry cements where high levels of replacement of the Portland cement are needed to reproduce the properties of traditional lime mortars. However, for its application in concrete, which is the primary focus of this report, the limestone’s contribution to the hydration reactions can be significant when it is co-ground with the clinker, albeit in relatively small amounts. So much so that it can arguably be classified as an SCM alongside GBFS and fly ash. The first significant use of limestone in general purpose Portland cement took place during WWII when it was used in several European countries to cut costs and increase output (Lea, 1970). Its widespread use today can be traced back to the 1973 oil crisis, with France, which had low production of fly ash and blast furnace slag, leading the way. The Portland limestone cements in the European cement standard EN 197-1 (2001), were adopted more or less un-changed from the French standard NF P 15-301 (1981). A systematic review of all standards and specifications for limestone and Portland limestone cements is beyond the scope of this report. [less ▲]

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See detailDevelopment of Specifications and Performance Criteria for Surface Preparation Based on Issues Related to Bond Strength
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, Andrzej et al

Report (2016)

In addition to the development of a satisfactory test procedure and recommendations to improve the overall quality of concrete repair works, the authors of this proposal intend to collaborate with various ... [more ▼]

In addition to the development of a satisfactory test procedure and recommendations to improve the overall quality of concrete repair works, the authors of this proposal intend to collaborate with various representatives from public agencies and from the industry to facilitate technological transfer. Presentations will be made in conferences and workshops in North America and Europe. At the end of the project, the results shall include two MSc theses and at least two papers in major journals, such as Concrete International or ACI Materials Journal. Also, the project should provide the basis towards a standard procedure for the evaluation of superficial cohesion of concrete, in relation with surface preparation and concrete removal techniques. Finally, recommendations and specifications could be incorporated in future versions of the ACI-ICRI Manual of Concrete Repairs as well as in DOT’s specifications. [less ▲]

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See detailSpecifying Concrete Repair Materials
Vaysburd, Alex; Bissonnette, Benoît; Garbacz, Andrzej et al

in Materialy Budowlane (2016), 3(523), 42-45

Specification of materials for concrete repair is a complex task requiring broad knowledge of materials science, engineering and construction practice. In this paper, several issues important for proper ... [more ▼]

Specification of materials for concrete repair is a complex task requiring broad knowledge of materials science, engineering and construction practice. In this paper, several issues important for proper design and implementation of concrete repair are discussed. It is stressed that the specification documentation is not a formality, but rather a critically important engineering step in view of fulfilling the durability and service life requirements. [less ▲]

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See detailRéparation des ouvrages en béton armé - Partie 2 : Compatibilité et performances
Courard, Luc ULg; Bissonnette, Benoît

in Techniques de l'Ingénieur. Analyse Chimique et Caractérisation (2016)

La réparation des bétons nécessite non seulement une bonne connaissance du support à réparer, des matériaux de réparation et de l’environnement dans lequel ils vont être mis en œuvre, mais aussi une ... [more ▼]

La réparation des bétons nécessite non seulement une bonne connaissance du support à réparer, des matériaux de réparation et de l’environnement dans lequel ils vont être mis en œuvre, mais aussi une compréhension des mécanismes à la base de l’adhésion. Les compatibilités dimensionnelle, électrochimique, chimique et porosimétrique (perméabilité) sont les clés de la réussite et de la durabilité de la réparation. Sur la base de l’analyse du patrimoine en béton armé et des stratégies d’intervention possible, l’accent a été placé dans la première partie sur l’étude des effets et des causes des principaux défauts de surface observés. Une fois la condition du béton en place adéquatement évaluée (Partie 1), la préparation de la surface avant réparation, sa propreté ou encore sa rugosité sont des conditions essentielles au développement de l’adhérence et de l’accrochage du produit de réparation, garantissant ainsi la durabilité de l’intervention. [less ▲]

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See detailRéparation des ouvrages en béton armé - Partie 1 : Pathologies et diagnostic
Courard, Luc ULg; Bissonnette, Benoît

in Techniques de l'Ingénieur. Analyse Chimique et Caractérisation (2016)

Repair of concrete not only requires knowledge of the support to repair, the repair materials and the environmental conditions in which they will be implemented, but also an understanding of the ... [more ▼]

Repair of concrete not only requires knowledge of the support to repair, the repair materials and the environmental conditions in which they will be implemented, but also an understanding of the mechanisms underlying adhesion. Dimensional, electrochemical, chemical and porosity (permeability) compatibilities are the key to the success and durability of the repair. In a first part, an analysis of the patrimonial heritage at stake and the possible intervention strategies is proposed. The emphasis is put here on the study of the effects and causes of deterioration affecting reinforced concrete structures: cracking, spalling and disintegration are the main types surface defects observed, most often in connection with corrosion of the underlying steel reinforcement. A proper diagnosis will allow selecting the most suitable repair techniques and materials (Part 2). [less ▲]

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See detailLa paille - projets construits
de Herde, André; Evrard, Arnaud; Rouche, Sylvie et al

Book published by UCL (2016)

En novembre 2011, un consortium rassemblant l’Université catholique de Louvain (Architecture et Climat), l’Université de Liège (GeMMe et UMC), l’Institut de Conseil et d’Études en Développement Durable ... [more ▼]

En novembre 2011, un consortium rassemblant l’Université catholique de Louvain (Architecture et Climat), l’Université de Liège (GeMMe et UMC), l’Institut de Conseil et d’Études en Développement Durable (ICEDD) et la jeune entreprise Paille-Tech est formé autour du projet de recherche « aPROpaille » financé par la DGO4 (Direction générale opérationnelle de l’Aménagement du territoire, du Logement, du Patrimoine et de l’Énergie) dans le cadre du programme ERable, organisé par le Service Public de Wallonie (DGO4 et DGO6, Direction Générale Opérationnelle de l’Économie, de l’Emploi et de la Recherche). Ce projet très complet a permis de déterminer les caractéristiques et performances des matériaux « terre » et « paille », de réaliser des simulations de comportement hygrothermique des parois en paille, de les comparer à des monitorings de bâtiments existants en paille, de réaliser une analyse de cycle de vie (ACV) de ce type de paroi… Outre la réalisation d’une plateforme Internet (www.apropaille.be) sur la filière belge, les principaux résultats de cette recherche ont été rassemblés fin 2015 dans trois vadémécums à destination d’un public large et varié. Ces vadémécums, dont le présent document en est la troisième partie, ont pour but d’offrir à tout un chacun une information rigoureuse, claire et compréhensible, des avancées récentes de ce domaine pour favoriser le développement de la filière de la paille utilisée comme matériau isolant dans la construction. Afin de permettre aux acteurs du monde de la construction de s’approprier les connaissances relatives à ce matériau, ce vadémécum s’intéressera aux projets qu’il est possible de construire et montre que les possibilités architecturales que permet l’utilisation de ce type de matériaux sont multiples et sont à la hauteur de la créativité des concepteurs qui les font naître. Le premier chapitre retrace synthétiquement l’historique de ce type de construction. Le deuxième définit une série de modes constructifs fréquemment rencontrés dans la pratique sur base du rôle constructif que joue la paille dans les parois. Une série de fiches est alors présentée pour constituer un catalogue de projets qui sont repris sur la plateforme Internet. Certains projets, les « cas d’étude », sont plus détaillés et leurs fiches reprennent l’ensemble des documents graphiques utiles pour comprendre leur plans, coupes et façades. Un dernier chapitre, intitulé « FAQs », tente de répondre aux questions les plus fréquemment posées sur la construction en paille. [less ▲]

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See detailSymposium 3R: Reduce, Reuse, Recycle in constructions
Garbacz, Andrzej; Courard, Luc ULg

Book published by Warsaw University of Technology (2016)

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See detailRecycled and bio-based materials for sustainable construction
Courard, Luc ULg

Conference (2016)

Recycling is not a luxury or a fashion but a necessity that comes from a very simple fact: we live in a limited world. Contrary to what we have believed for a long time, our human activity is not ... [more ▼]

Recycling is not a luxury or a fashion but a necessity that comes from a very simple fact: we live in a limited world. Contrary to what we have believed for a long time, our human activity is not infinitely expandable but limited in terms of energy, natural resources, space or simply adaptation capacity of nature. From this finding and that awareness must result a behavior that essentially is based on the respect we have for ourselves and therefore for nature (to take car and not to convert). Recycling, reuse, re-use, regeneration or recovery are behaviors that aim to minimize the energy used, to take maximum advantage of the material and to reduce the risk of pollution during the manufacture, use or disposal of these materials. In general, this means that it is desired to delay as much as possible when an object becomes waste. This requires a vision of the life of material or object (Life Cycle Assessment), in which a balance sheet is prepared at every stage of life - from raw material extraction, manufacturing, processing, recycling and elimination. Additionally to materials known as "natural" or “bio-based”, the construction industry increasingly incorporates these alternative materials, even if not without some psychological, normative and technical reservations. As a significant source of pollution (CO2, solid waste, ...), construction is a major reservoir for recovery of waste and industrial by-products: alongside the traditional production process of construction materials and the resurgence of bio-based materials, recycled materials also contribute to the development of materials for future. [less ▲]

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See detailInfluence de la fraction granulaire et de l'origine des granulats recyclés sur leurs propriétés
Zhao, Zengfeng ULg; Courard, Luc ULg; Michel, Frédéric ULg et al

in Courard, Luc; Collin, Frédéric; Cerfontaine, Benjamin (Eds.) RUGC 2016 (2016)

De très grandes quantités de déchets de construction et de démolition sont produites chaque année. Afin de faire bon usage des granulats recyclés (GR) dans le béton, il est très important d’étudier ... [more ▼]

De très grandes quantités de déchets de construction et de démolition sont produites chaque année. Afin de faire bon usage des granulats recyclés (GR) dans le béton, il est très important d’étudier l’influence de la fraction granulaire et de l’origine des granulats recyclés sur leurs propriétés. Dans cette étude, les granulats recyclés de blocs (GR_Blocs) et de hourdis (GR_Hourdis) ont été concassés et puis séparés en 4 fractions granulaires (0/2, 2/6,3, 6,3/14, 14/20mm). Chaque fraction granulaire des GR a été caractérisée. Les résultats montrent que la teneur en pâte de ciment durcie des GR augmente lorsque la taille des particules diminue. Les sables recyclés possèdent ainsi des teneurs en pâte de ciment nettement plus élevées que les gravillons recyclés. Les sables recyclés possèdent en particulier un coefficient d’absorption d’eau très élevé par rapport aux gravillons recyclés. Les valeurs de teneur en pâte de ciment durcie obtenues pour les GR_Blocs sont plus faibles que celles mesurées sur les GR_Hourdis, ce qui provient d’une plus faible quantité de pâte de ciment initiale du bloc. Les résultats montrent que pour toutes les fractions des GR, les GR_Hourdis sont plus anguleux que les GR_Blocs. [less ▲]

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See detailÉvaluation des réparations en béton et identification des principaux facteurs d’influence
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, Andrzej et al

in Courard, Luc; Collin, Frédéric; Cerfontaine, Benjamin (Eds.) RUGC 2016 (2016)

La réparation et le renforcement des structures existantes en béton comptent parmi les plus importants défis auxquels les ingénieurs civils sont confrontés aujourd’hui et qu’ils devront relever dans les ... [more ▼]

La réparation et le renforcement des structures existantes en béton comptent parmi les plus importants défis auxquels les ingénieurs civils sont confrontés aujourd’hui et qu’ils devront relever dans les années à venir. Les préoccupations actuelles concernant le développement durable favorisent la réfection au détriment de la construction neuve et ne peuvent que renforcer cette tendance. Des efforts concertés de la part des scientifiques et ingénieurs sont encore nécessaires afin d’améliorer la conception des réparations en béton et d’en assurer la qualité et la fiabilité attendues. L’un des aspects essentiels de la durabilité des réparations en béton et des revêtements ou traitements de surface est la qualité de l’adhérence entre le matériau de réparation et le béton existant. Le présent article résume les principales conclusions de travaux réalisés en collaboration en vue d’identifier les facteurs influençant l’adhérence des réparations (la rugosité, le degré de saturation et la carbonatation du substrat) et l’évaluation de celle-ci en conditions in situ (type de chargement, alignement de l’appareil). Sur la base des résultats recueillis, des recommandations ont été émises dans un guide du USBR [less ▲]

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