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Efficacite Et Comportement A Long Terme Des Produits Colmateurs Pour Betons
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Book Synopsis Efficacité et comportement à long terme des produits colmateurs pour bétons by : Nassim Timhadjelt
Download or read book Efficacité et comportement à long terme des produits colmateurs pour bétons written by Nassim Timhadjelt and published by . This book was released on 2021 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: La corrosion est l'une des pathologies les plus graves affectant les structures en béton armé, elle est principalement causée par la pénétration d'agents agressifs tels que le CO2 dans le béton dans le cas de la corrosion induite par la carbonatation. Celle-ci est accélérée et amplifiée en présence de fissures et lorsque l'interface acier/béton est de mauvaise qualité. Pour limiter la pénétration du dioxyde de carbone, il est possible d'appliquer des produits de protection sur la surface du béton afin de colmater totalement ou partiellement les pores et les microfissures. Ces produits sont classés par la norme NF EN 1504-2 en trois familles et dans cette étude, un produit de chaque famille a été sélectionné :- Produits de revêtement qui produisent une couche protectrice continue sur la surface : revêtement acrylique (AC)- Produits d'imprégnation qui réduisent la porosité de la peau du béton : produit d'imprégnation acrylique (AI)- Produits d'imprégnation hydrophobes qui créent une surface hydrofuge : produit à base de siloxanes (SC)Ce travail a pour objectif d'évaluer l'efficacité et la durabilité des produits de protection de surface sélectionnés en étudiant leurs profondeurs de pénétration et leurs impacts sur la carbonatation, les propriétés de transport (diffusion et perméabilité aux gaz) et la corrosion. Dans cette optique, différents dispositifs expérimentaux (enceinte carbonatation, cellules de diffusion et de perméabilité) et instruments de caractérisation physico-chimique sont utilisés.Cette étude a montré que ces produits apportent une contribution importante à la protection des surfaces des matériaux cimentaires contre la pénétration et la diffusion d'agents extérieurs agressifs tels que le CO2. Ceci permet de retarder la carbonatation de l'enrobage de béton. Pour les échantillons fissurés, AI et AC, réduisent de manière significative la longueur carbonatée à l'interface acier/mortier. Ces deux produits semblent avoir à la fois un pouvoir protecteur sur les matériaux non fissurés et sont capables de colmater des fissures de quelques centaines de μm.En ce qui concerne le suivi de corrosion, une nouvelle méthode expérimentale couplée à la simulation numérique (COMSOL) a été développée. Elle a permis de démontrer l'effet immédiat de l'application des produits ainsi que l'influence d'un rechargement mécanique.En résumé, cette étude a permis de comparer l'efficacité et le comportement à long terme de trois produits de protection des surfaces en béton vis-à-vis de l'ensemble des phénomènes conduisant à la corrosion induite par carbonatation. Un produit se démarque, le revêtement acrylique (AC).
Book Synopsis The Boltzmann Equation by : E.G.D. Cohen
Download or read book The Boltzmann Equation written by E.G.D. Cohen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: In,1872, Boltzmann published a paper which for the first time provided a precise mathematical basis for a discussion of the approach to equilibrium. The paper dealt with the approach to equilibrium of a dilute gas and was based on an equation - the Boltzmann equation, as we call it now - for the velocity distribution function of such ~ gas. The Boltzmann equation still forms the basis of the kinetic theory of gases and has proved fruitful not only for the classical gases Boltzmann had in mind, but als- if properly generalized - for the electron gas in a solid and the excitation gas in a superfluid. Therefore it was felt by many of us that the Boltzmann equation was of sufficient interest, even today, to warrant a meeting, in which a review of its present status would be undertaken. Since Boltzmann had spent a good part of his life in Vienna, this city seemed to be a natural setting for such a meeting. The first day was devoted to historical lectures, since it was generally felt that apart from their general interest, they would furnish a good introduction to the subsequent scientific sessions. We are very much indebted to Dr. D.
Book Synopsis Contemporary Kinetic Theory of Matter by : J. R. Dorfman
Download or read book Contemporary Kinetic Theory of Matter written by J. R. Dorfman and published by Cambridge University Press. This book was released on 2021-06-24 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough examination of kinetic theory and its successes in understanding and describing irreversible phenomena in physical systems.
Book Synopsis Waterbased acrylates for decorative coatings by : Manfred Schwartz
Download or read book Waterbased acrylates for decorative coatings written by Manfred Schwartz and published by . This book was released on 2001 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organic Polymer Chemistry by : K. J. Saunders
Download or read book Organic Polymer Chemistry written by K. J. Saunders and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the organic chemistry of polymers which find technological use as adhesives, fibres, paints, plastics and rubbers. For the most part, only polymers which are of commercial significance are considered and the primary aim of the book is to relate theoretical aspects to industrial practice. The book is mainly intended for use by students in technical institutions and universities who are specializing in polymer science and by graduates who require an introduction to this field. Several excellent books have recently appeared dealing with the physical chemistry of polymers but the organic chemistry of polymers has not received so much attention. In recognition of this situation and because the two aspects of polymer chemistry are often taught separately, this book deals specifically with organic chemistry and topics of physical chemistry have been omitted. Also, in this way the book has been kept to a reasonable size. This is not to say that integration of the two areas of polymer science is undesirable; on the contrary, it is of the utmost importance that the inter-relationship should b~ appreciated. I wish to record my thanks to my colleagues with whom I have had many helpful discussions, particularly Mrs S. L. Radchenko. I also thank Miss E. Friesen for obtaining many books and articles on my behalf and Mr H. Harms for encouragement and assistance. I am also grateful to Mrs M. Stevens who skilfully prepared the manuscript. Department of Chemical and Metallurgical Technology, Ryerson Polytechnical Institute, K. J. S.
Book Synopsis Laboratory Raman Spectroscopy by : Dennis P. Strommen
Download or read book Laboratory Raman Spectroscopy written by Dennis P. Strommen and published by Wiley-Interscience. This book was released on 1984 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a nuts and bolts approach to using Raman spectroscopy and recording Raman data. It serves as a laboratory reference manual for both novice and expert chemists, with procedures and appropriate cautions carefully explained. It includes tables of laser frequency, plasma lines and calibration procedures as well as a listing of sampling techniques.
Book Synopsis Boltzmann Collision Operator With Inverse-power Intermolecular Potentials by : Young-Ping Pao
Download or read book Boltzmann Collision Operator With Inverse-power Intermolecular Potentials written by Young-Ping Pao and published by Legare Street Press. This book was released on 2023-07-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This seminal work by Youngping Pao is an essential reference for anyone working in the field of molecular physics and quantum mechanics. Pao's groundbreaking research on the Boltzmann collision operator and its interaction with inverse-power intermolecular potentials has far-reaching implications for our understanding of the fundamental laws of nature and the behavior of matter at the molecular level. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
