TRANSPORT D'HUMIDITE EN MATERIAUX POREUX EN PRESENCE D'UN GRADIENT DE TEMPERATURE. CARACTERISATION EXPERIMENTALE PDF Download

Author: FELLA.. ABADA
Publisher:
ISBN:
Category :
Languages : fr
Pages : 155

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Book Description
CE TRAVAIL DE THESE PORTE SUR DES ETUDES EXPERIMENTALES RELATIVES AUX TRANSFERTS MONODIMENSIONNELS D'HUMIDITE SOUS DIFFERENTS GRADIENTS THERMIQUES DANS DES MATERIAUX POREUX QUI SONT: LE BETON AUTOCLAVE NON EXPANSE, LA VERMICULITE, DEUX ROCHES EXTRAITES DE CARRIERES (ROUFFACH ET RORSCHACH) SERVANT A LA RESTAURATION DE MONUMENTS HISTORIQUES. UN DISPOSITIF EXPERIMENTAL EST UTILISE POUR LE SUIVI CONTINU DES EVOLUTIONS DE TENEURS EN EAU (METHODE GAMMAMETRIQUE) ET DE TEMPERATURES (SONDES THERMIQUES) DURANT DES ESSAIS DE CONDENSATION ET DE SECHAGE. L'OBJECTIF PRINCIPAL DE CE TRAVAIL EST LA DETERMINATION DES COEFFICIENTS DE TRANSFERT POUR CHAQUE MATERIAU, DETERMINATION BASEE SUR LA THEORIE CLASSIQUE DU TRANSFERT DE MASSE ET DE CHALEUR DE DE VRIES. LES COEFFICIENTS DE TRANSFERT SONT CALCULES PAR UN PROCEDE DE REGRESSION ENTRE LES VARIABLES MESUREES: FLUX DE MASSE, GRADIENT DE TEMPERATURE ET GRADIENT DE TENEUR EN EAU, ON DONNE LEURS EVOLUTIONS AVEC LA TENEUR EN EAU ET POUR DIFFERENTES TEMPERATURES. D'AUTRES EXPERIENCES SONT AUSSI REALISEES DONNANT LES CONDUCTIVITES THERMIQUES ET LES ISOTHERMES D'ADSORPTION PERMETTANT, AINSI, D'ACQUERIR DES INFORMATIONS SUR LE COMPORTEMENT DES MATERIAUX VIS A VIS DU TRANSFERT DE CHALEUR ET DE VAPEUR D'EAU

Author: Jean-François Daïan
Publisher: John Wiley & Sons
ISBN: 1118931297
Category : Technology & Engineering
Languages : en
Pages : 277

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Equilibrium and Transfer in Porous Media 3 A porous medium is composed of a solid matrix and its geometrical complement: the pore space. This pore space can be occupied by one or more fluids. The understanding of transport phenomena in porous media is a challenging intellectual task. This book provides a detailed analysis of the aspects required for the understanding of many experimental techniques in the field of porous media transport phenomena. It is aimed at students or engineers who may not be looking specifically to become theoreticians in porous media, but wish to integrate knowledge of porous media with their previous scientific culture, or who may have encountered them when dealing with a technological problem. While avoiding the details of the more mathematical and abstract developments of the theories of macroscopization, the author gives as accurate and rigorous an idea as possible of the methods used to establish the major laws of macroscopic behavior in porous media. He also illustrates the constitutive laws and equations by demonstrating some of their classical applications. The priority is to put the constitutive laws in concrete circumstances without going into technical detail. This third volume in the three-volume series focuses on the applications of isothermal transport and coupled transfers in porous media.

Author: Ravindra K. Dhir
Publisher: Thomas Telford
ISBN: 9780727731791
Category : Architecture
Languages : en
Pages : 1036

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Book Description
There is no substitute for concrete that can be used on the same engineering scale. Its sustainability, exploitation and further development are necessary for a healthy economy and environment worldwide. Concrete must keep evolving to satisfy the increasing demands of all its users.

Author: AMZIANE Sofiane
Publisher: Lavoisier
ISBN: 2746288095
Category : Aggregates (Building materials)
Languages : en
Pages : 354

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Ce livre est un des tout premiers « si non le premier » exclusivement dédié au domaine des bétons de végétaux. Nous nous employons au fur et à mesure des chapitres de décrire l’intérêt de l’usage de tels matériaux, de décliner les nombreuses propriétés multiphysiques et enfin d’illustrer les modes de fabrication et de mise en œuvre. Le livre se focalise principalement sur l’exemple du béton de chanvre. Ce matériau est aujourd’hui très largement utilisé dans l’industrie de la maison individuelle. Le confort thermique, hygrothermique et acoustique est induit par la structure exceptionnelle du matériau dans le sens où elle associe porosité, légèreté et inertie. Le comportement mécanique n’est pas en reste, une grande ductilité et des propriétés loin des standards habituels sont précisées dans cet ouvrage. Par ailleurs, l’Analyse de cycle de vie dont la plus grande partie du volume est d’origine végétale fait ressortir un bilan qui lui est très favorable.

Author: Sofiane Amziane
Publisher: John Wiley & Sons
ISBN: 111857706X
Category : Technology & Engineering
Languages : en
Pages : 332

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Using plant material as raw materials for construction is a relatively recent and original topic of research. This book presents an overview of the current knowledge on the material properties and environmental impact of construction materials made from plant particles, which are renewable, recyclable and easily available. It focuses on particles and as well on fibers issued from hemp plant, as well as discussing hemp concretes. The book begins by setting the environmental, economic and social context of agro-concretes, before discussing the nature of plant-based aggregates and binders. The formulation, implementation and mechanical behavior of such building materials are the subject of the following chapters. The focus is then put upon the hygrothermal behavior and acoustical properties of hempcrete, followed by the use of plant-based concretes in structures. The book concludes with the study of life-cycle analysis (LCA) of the environmental characteristics of a banked hempcrete wall on a wooden skeleton. Contents 1. Environmental, Economic and Social Context of Agro-Concretes, Vincent Nozahic and Sofiane Amziane. 2. Characterization of Plant-Based Aggregates. Vincent Picandet. 3. Binders, Gilles Escadeillas, Camille Magniont, Sofiane Amziane and Vincent Nozahic. 4. Formulation and Implementation, Christophe Lanos, Florence Collet, Gérard Lenain and Yves Hustache. 5. Mechanical Behavior, Laurent Arnaud, Sofiane Amziane, Vincent Nozahic and Etienne Gourlay. 6. Hygrothermal Behavior of Hempcrete, Laurent Arnaud, Driss Samri and Étienne Gourlay. 7. Acoustical Properties of Hemp Concretes, Philippe Glé, Emmanuel Gourdon and Laurent Arnaud. 8. Plant-Based Concretes in Structures: Structural Aspect – Addition of a Wooden Support to Absorb the Strain, Philippe Munoz and Didier Pipet. 9. Examination of the Environmental Characteristics of a Banked Hempcrete Wall on a Wooden Skeleton, by Lifecycle Analysis: Feedback on the LCA Experiment from 2005, Marie-Pierre Boutin and Cyril Flamin. About the Authors Sofiane Amziane is Professor and head of the Civil Engineering department at POLYTECH Clermont-Ferrand in France. He is also in charge of the research program dealing with bio-based building materials at Blaise Pascal University (Institut Pascal, Clermont Ferrand, France). He is the secretary of the RILEM Technical Committee 236-BBM dealing with bio-based building materials and the author or co-author of over one hundred papers in scientific journals such as Cement and Concrete Research, Composite Structures or Construction Building Materials as well as international conferences. Laurent Arnaud is a Bridges, Waters and Forestry Engineer (Ingénieur des Ponts, Eaux et Forêts) and researcher at Joseph Fourier University in Grenoble, France. He is also Professor at ENTPE (Ecole Nationale des Travaux Publics de l’Etat). Trained in the field of mechanical engineering, his research has been directed toward the characterization and development of new materials for civil engineering and construction. He is head of the international committee at RILEM – BBM, as well as the author of more than one hundred publications, and holder of an international invention patent.

Author: Mukesh C. Limbachiya
Publisher: Thomas Telford
ISBN: 9780727732866
Category : Business & Economics
Languages : en
Pages : 362

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Proceedings of the International Conference organised by the Concrete and Masonry Research Group and held at Kingston University - London at 14-15 September 2004 With the introduction of waste legislation, in the form of regulations and directives, in many parts of the world a significant move towards sustainable waste management is becoming a legal requirement. Emphasisis now being placed on increasing recycling and promoting more sustainable waste management practices, and greater co-ordination between the public, private and independent sectors, and all concerned with the management of waste and reusable materials.

Author: OLLIVIER Jean-Pierre
Publisher: Lavoisier
ISBN: 2746288338
Category :
Languages : en
Pages : 306

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À l'état durci, le béton est un matériau poreux complexe. Ses propriétés d'usage (performances mécaniques ou thermiques, durabilité…) sont liées à sa structure poreuse qui elle-même dépend de l'arrangement des grains à l'état frais. Étudiant les propriétés des matériaux granulaires et celles de leurs mélanges, cet ouvrage propose différents outils permettant au formulateur de concevoir des bétons de façon innovante. Afin de décrire les méthodes de caractérisation des matériaux, il analyse les propriétés physiques sur lesquelles elles reposent et établit ainsi leurs limites. Il développe également les notions de porosité et de surface spécifique et présente les propriétés de transport des bétons (diffusion et perméation). Chaque chapitre se termine par plusieurs exercices permettant d'assimiler les connaissances théoriques présentées et de les appliquer à des problèmes concrets de génie civil.

Author: Jean-Pierre Ollivier
Publisher: John Wiley & Sons
ISBN: 111856295X
Category : Technology & Engineering
Languages : en
Pages : 242

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Understanding the rheological properties of fresh concrete, the hydration phenomenon of cement responsible for structuration, the relationship between the characteristics of the porous solid obtained and its mechanical performances or resistance to the aggressive penetration requires a complex knowledge of the physicochemistry of reactive porous materials. The development of simple formulation rules therefore requires the assimilation of this knowledge and a good command of the properties of these materials. The purpose of this book is to provide the mix designer with useful knowledge on granular materials and porous materials, which will enable the innovative design of concrete. Topics covered include the characterization of granular materials, the concepts of porosity and specific surface area, and the transport properties (diffusion and permeation) of concrete. Some of these topics are already covered in other general books dedicated to granular or porous materials. The objective here is to bring them together in one book by adapting them for use by concrete specialists. Applications in the form of exercises are offered at the end of each chapter to enable readers to assimilate the theoretical knowledge and to apply such knowledge to concrete problems encountered in civil engineering. Contents 1. Description of Granular Materials, Definitions. 2. Granulometry. 3. Specific Surface Area of Materials. 4. Voids in Granular Materials and the Arrangement of Grains. 5. Voids in Concrete. 6. The Fundamentals of Diffusion. 7. Permeability.

Author: Heinz R. Trechsel
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 494

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Author: Patrick Perré
Publisher:
ISBN: 9782907086127
Category : Lumber
Languages : en
Pages : 366

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