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Author : Antonin Fabbri
Publisher :
ISBN 13 : 9782356079459
Total Pages : 261 pages
Book Rating : 4.0/5 (794 download)
Download or read book Physico-mécanique des matériaux cimentaires soumis au gel-dégel written by Antonin Fabbri and published by . This book was released on 2008 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thi Thanh Xuan Dinh
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (868 download)
Download or read book Etude expérimentale et numérique de l'approche physico-chimique pour le matériau cimentaire soumis au dioxyde de carbone (CO2) written by Thi Thanh Xuan Dinh and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aujourd'hui, la durabilité des structures en matériau cimentaire est un des facteurs importants dans les domaines du génie civil et du génie industriel. Elle est influencée non seulement par les chargements mécaniques mais aussi par l'environnement (pollution, pluie...). Ces influences deviennent plus importantes quand on doit garantir une durée de service du matériau pendant une grande période. Le mécanisme de dégradation chimique du matériau cimentaire consiste à une décalcification progressive au cours du temps en contact avec un environnement agressif (par exemple l’attaque par les chlorures, par les sulfates, les cycles gel-dégel, l’alcali-réaction). Cette dégradation provoque la variation de la porosité du béton qui modifie les propriétés physico-chimiques et mécaniques. D'une part cette variation de porosité accélère le processus de transport de matières et entraîne une accélération de la dissolution des hydrates (notamment la portlandite). D'autre part, ceci induit une modification des propriétés mécaniques, notamment le retrait. En plus, les sollicitations mécaniques créent des microfissures qui peuvent être des facteurs accélérant le processus de dégradation chimique. Ce travail de thèse est réalisé pour étudier le phénomène physico-chimique de la carbonatation sur les matériaux cimentaires comme les mortiers et les pâtes de ciment à la base CEM I et CEM III. Le but principal de cette étude est de caractériser expérimentalement et numériquement les effets du dioxyde de carbone (CO2) sur la durabilité et les propriétés mécaniques d’un matériau cimentaire. Dans la partie expérimentale, nous prenons en compte quelques paramètres importants tels que : le retrait, la variation de la porosité et de la masse en fonction de différentes teneurs en dioxyde de carbone (CO2) : 5%, 10%, 13%, 15%, 17%, 20%. Le modèle numérique basé sur l’approche physico-chimique de Bary et Sellier (2004) nous permet de valider les paramètres qui influencent le phénomène de carbonatation en matériau cimentaire comme le taux de saturation en eau, la pression partielle de dioxyde de carbone (CO2), la concentration en ions calcium et la porosité. Ceci confirme que les transferts de dioxyde de carbone (CO2) en phase gazeuse couplent avec les transferts de l’eau liquide et des ions du calcium Ca2+ en solution aqueuse au cours de la carbonatation.
Author : Sébastien Bouteille
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (862 download)
Download or read book Outils de caractérisation et analyse du comportement des matériaux cimentaires soumis à des cycles de gel-dégel en présence de sels written by Sébastien Bouteille and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un béton exposé à des cycles de gel-dégel peut subir des dégradations généralement identifiées sous deux formes. Le gel interne, d'une part, qui affecte le coeur du matériau et peut aboutir à une microfissuration généralisée de la pâte cimentaire. La sensibilité d'un béton courant à ce mode de détérioration peut être diminuée par la présence d'un réseau de bulles d'air au sein de la pâte cimentaire. L'écaillage, d'autre part, qui est une détérioration de surface. Cette dernière est le plus souvent quantifiée par la perte de masse sur la surface exposée. Cette forme de dégradation est fortement influencée par la présence d'une solution aqueuse proche de la surface de béton exposée et de sa concentration en sels fondants (généralement du chlorure de sodium). Lorsque la formulation d'un béton courant n'est pas adaptée pour résister à ce type d'environnement, les dégradations liées au gel interne et à l'écaillage peuvent pénaliser l'exploitation de l'ouvrage concerné dans des conditions de services attendues. Des essais laboratoire, exposant des corps d'épreuve en béton à des cycles de gel-dégel accélérés, permettent d'évaluer la résistance d'un béton face à ces deux formes de détériorations. La communauté scientifique s'accorde sur les essais permettant de caractériser la détérioration par le gel interne et l'aspect protecteur d'un réseau de bulles d'air. Par contre, l'écaillage est encore abordé par diverses procédures expérimentales qui ne font pas consensus et ont peu évolué depuis le milieu des années 1990 (...).
Author : Emmanuel Guillon
Publisher :
ISBN 13 : 9782110951007
Total Pages : 154 pages
Book Rating : 4.9/5 (51 download)
Download or read book Durabilité des matériaux cimentaires written by Emmanuel Guillon and published by . This book was released on 2004 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les performances des matériaux de construction à matrice cimentaire proviennent principalement du ciment hydraté. Grâce à l'expérimentation et à la modélisation ces matériaux ont pu être adaptés à certains environnements chimiquement agressifs. Nous proposons une nouvelle approche basée sur les transports réactifs, applicable à tout solution agressive externe. L'évolution des minéraux de la matrice cimentaire, par dissolutions ou précipitations, est mise en relation avec celle de la solution interstitielle, elle même reliée aux échanges ioniques avec l'extérieur. Les dégradations chimiques modifient la microstructure du matériau, qui est modélisée par des images digitalisées. Notre approche a été validée sur trois matériaux différents, dans trois environnements distincts. Un modèle mécanique aux éléments-finis, complémentaire, caractérise l'évolution du module de Young résiduel du matériau dégradé en utilisant la représentation digitalisée de la microstructure.
Author : Leslie Rainer
Publisher : Getty Publications
ISBN 13 : 1606060430
Total Pages : 438 pages
Book Rating : 4.6/5 (6 download)
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author : Olivier Coussy
Publisher : John Wiley & Sons
ISBN 13 : 047009270X
Total Pages : 312 pages
Book Rating : 4.4/5 (7 download)
Download or read book Poromechanics written by Olivier Coussy and published by John Wiley & Sons. This book was released on 2004-03-05 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modelling and predicting how porous media deform when subjected to external actions and physical phenomena, including the effect of saturating fluids, are of importance to the understanding of geophysics and civil engineering (including soil and rock mechanics and petroleum engineering), as well as in newer areas such as biomechanics and agricultural engineering. Starting from the highly successful First Edition, Coussy has completely re-written Mechanics of Porous Continua/Poromechanics to include: New material for: Partially saturated porous media Reactive porous media Macroscopic electrical effects A single theoretical framework to the subject to explain the interdisciplinary nature of the subject Exercises at the end of each chapter to aid understanding The unified approach taken by this text makes it a valuable addition to the bookshelf of every PhD student and researcher in civil engineering, petroleum engineering, geophysics, biomechanics and material science.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Remediation Technologies for Soils and Groundwater written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wolfgang Ehlers
Publisher : Springer Science & Business Media
ISBN 13 : 3662049996
Total Pages : 459 pages
Book Rating : 4.6/5 (62 download)
Download or read book Porous Media written by Wolfgang Ehlers and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume offers a state-of-the-art report on the various recent sci entific developments in the Theory of Porous Media (TPM) comprehending the basic theoretical concepts in continuum mechanics on porous and mul tiphasic materials as well as the wide range of experimental and numerical applications. Following this, the volume does not only address the sophisti cated reader but also the interested beginner in the area of Porous Media by presenting a collection of articles. These articles written by experts in the field concern the fundamental approaches to multiphasic and porous materials as well as various applications to engineering problems. In many branches of engineering just as in applied natural sciences like bio- and chemomechanics, one often has to deal with continuum mechanical problems which cannot be uniquely classified within the well-known disci plines of either "solid mechanics" or "fluid mechanics". These problems, characterized by the fact that they require a unified treatment of volumetri cally coupled solid-fluid aggregates; basically fall into the categories of either mixtures or porous media. Following this, there is a broad variety of problems ranging in this category as for example the investigation of reacting fluid mix tures or solid-fluid suspensions as well as the investigation of the coupled solid deformation and pore-fluid flow behaviour of liquid- and gas-saturated porous solid skeleton materials like geomaterials (soil, rock, concrete, etc. ), polymeric and metallic foams or biomaterials (hard and soft tissues, etc).
Author : Roberto J. Torrent
Publisher : CRC Press
ISBN 13 : 0429012918
Total Pages : 536 pages
Book Rating : 4.4/5 (29 download)
Download or read book Concrete Permeability and Durability Performance written by Roberto J. Torrent and published by CRC Press. This book was released on 2021-12-22 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durability and service life design of concrete constructions have considerable socio-economic and environmental consequences, in which the permeability of concrete to aggressive intruders plays a vital role. Concrete Permeability and Durability Performance provides deep insight into the permeability of concrete, moving from theory to practice, and presents over 20 real cases, such as Tokyo’s Museum of Western Art, Port of Miami Tunnel and Hong Kong-Zhuhai-Macao sea-link, including field tests in the Antarctic and Atacama Desert. It stresses the importance of site testing for a realistic durability assessment and details the "Torrent Method" for non-destructive measurement of air-permeability. It also delivers answers for some vexing questions: Should the coefficient of permeability be expressed in m2 or m/s? How to get a "mean" pore radius of concrete from gas-permeability tests? Why should permeability preferably be measured on site? How can service life of reinforced concrete structures be predicted by site testing of gas-permeability and cover thickness? Practitioners will find stimulating examples on how to predict the coming service life of new structures and the remaining life of existing structures, based on site testing of air-permeability and cover thickness. Researchers will value theoretical principles, testing methods, as well as how test results reflect the influence of concrete mix composition and processing.
Author : Peter A. Claisse
Publisher : Butterworth-Heinemann
ISBN 13 : 0128027517
Total Pages : 530 pages
Book Rating : 4.1/5 (28 download)
Download or read book Civil Engineering Materials written by Peter A. Claisse and published by Butterworth-Heinemann. This book was released on 2015-09-03 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil Engineering Materials explains why construction materials behave the way they do. It covers the construction materials content for undergraduate courses in civil engineering and related subjects and serves as a valuable reference for professionals working in the construction industry. The book concentrates on demonstrating methods to obtain, analyse and use information rather than focusing on presenting large amounts of data. Beginning with basic properties of materials, it moves on to more complex areas such as the theory of concrete durability and corrosion of steel. Discusses the broad scope of traditional, emerging, and non-structural materials Explains what material properties such as specific heat, thermal conductivity and electrical resistivity are and how they can be used to calculate the performance of construction materials. Contains numerous worked examples with detailed solutions that provide precise references to the relevant equations in the text. Includes a detailed section on how to write reports as well as a full section on how to use and interpret publications, giving students and early career professionals valuable practical guidance.
Author : Thierry Joffroy
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.3/5 (91 download)
Download or read book Traditional Conservation Practices in Africa written by Thierry Joffroy and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Josef Kaufmann
Publisher :
ISBN 13 : 9783905594201
Total Pages : 187 pages
Book Rating : 4.5/5 (942 download)
Download or read book Experimental Identification of Damage Mechanisms in Cementitious Porous Materials on Phase Transition of Pore Solution Under Frost Deicing Salt Attack written by Josef Kaufmann and published by . This book was released on 2000 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adam M. Neville
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Download or read book Properties of Concrete written by Adam M. Neville and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Julian Keable
Publisher :
ISBN 13 : 9781853397271
Total Pages : 0 pages
Book Rating : 4.3/5 (972 download)
Download or read book Rammed Earth Structures written by Julian Keable and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ramming earth has been a method of construction for centuries in many parts of the world and the technique can produce buildings that are strong, durable, safe and desirable. Because earth is an abundant and cheap resource, rammed earth buildings are often very economical. To achieve the best results the right techniques for the selection and testing of soils must be used to protect walls from water damage and shrinkage. This book aims to show how high standards can be achieved and the criteria on which rammed earth structures and building techniques can be judged. Since the fi rst edition of this book was published, the standards described in Rammed Earth Structures has been adopted as a Building Standard in Zimbabwe. Further progress is being made extending the use of rammed earth as an officially sanctioned building material across all SADC countries. This book is now therefore becoming an important guide and resource for those wishing to employ this economical and low-carbon building material in the construction of public as well as private buildings in Africa and elsewhere. This book aims to show how high standards can be achieved and the criteria on which rammed earth structures and building techniques can be judged. An important guide and resource for those wishing to employ this economical and low-carbon building material in the construction of public as well as private buildings in Africa and elsewhere.
