Mécanismes d'action des fines et des granulats de verre sur la réaction alcali-silice et la réaction pouzzolanique PDF Download
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Book Description
Le recyclage du verre mixte contenant plusieurs couleurs pour la fabrication de nouveaux verres n'est actuellement pas économiquement viable. Ceci explique la recherche d'autres débouchés que le stockage ou l'enfouissement en décharges. L'une des applications envisageables est sa valorisation dans la fabrication des ciments et des bétons. Néanmoins, il est nécessaire de gérer les deux principaux comportements que peut avoir ce verre lorsqu'il est mis en contact avec une matrice cimentaire, à savoir : - un comportement néfaste associé à la réaction alcali-silice, si le verre est utilisé sous la forme de grosses particules ; - un comportement bénéfique associé à la réaction pouzzolanique, si le verre est utilisé sous la forme de fines particules. Par ailleurs, il ne faut pas négliger la teneur importante en alcalins que contient ce type de verre (de l'ordre de 13% en masse), puisque ces alcalins sont susceptibles d'activer la réaction alcali-silice. Une campagne expérimentale a été menée afin d'apporter des réponses à différentes questions soulevées quant au rôle du verre dans une matrice cimentaire. La première partie de ce travail a été consacrée d'une part à l'évaluation dans des mortiers du potentiel réactif (alcali-réactif et pouzzolanique) de neufs classes granulaire de verre s'étalant entre 3/m et 2,5mm. D'autre part, nous avons évalué la possibilité d'utiliser des fines de verre pour contrer l'effet néfaste des classes granulaires les plus grosses ayant montré un comportement alcali-réactif. La seconde partie du travail a été consacrée à l'étude des mécanismes de comportement des fines et granulats de verre en milieux aqueux et cimentaires. Différentes réponses ont ainsi été proposées afin d'expliquer les comportements différents observés qui sont fonction de la taille des grains de verre.
Book Description
Le recyclage du verre mixte contenant plusieurs couleurs pour la fabrication de nouveaux verres n'est actuellement pas économiquement viable. Ceci explique la recherche d'autres débouchés que le stockage ou l'enfouissement en décharges. L'une des applications envisageables est sa valorisation dans la fabrication des ciments et des bétons. Néanmoins, il est nécessaire de gérer les deux principaux comportements que peut avoir ce verre lorsqu'il est mis en contact avec une matrice cimentaire, à savoir : - un comportement néfaste associé à la réaction alcali-silice, si le verre est utilisé sous la forme de grosses particules ; - un comportement bénéfique associé à la réaction pouzzolanique, si le verre est utilisé sous la forme de fines particules. Par ailleurs, il ne faut pas négliger la teneur importante en alcalins que contient ce type de verre (de l'ordre de 13% en masse), puisque ces alcalins sont susceptibles d'activer la réaction alcali-silice. Une campagne expérimentale a été menée afin d'apporter des réponses à différentes questions soulevées quant au rôle du verre dans une matrice cimentaire. La première partie de ce travail a été consacrée d'une part à l'évaluation dans des mortiers du potentiel réactif (alcali-réactif et pouzzolanique) de neufs classes granulaire de verre s'étalant entre 3/m et 2,5mm. D'autre part, nous avons évalué la possibilité d'utiliser des fines de verre pour contrer l'effet néfaste des classes granulaires les plus grosses ayant montré un comportement alcali-réactif. La seconde partie du travail a été consacrée à l'étude des mécanismes de comportement des fines et granulats de verre en milieux aqueux et cimentaires. Différentes réponses ont ainsi été proposées afin d'expliquer les comportements différents observés qui sont fonction de la taille des grains de verre.
Author: Don Montague Publisher: Taylor & Francis ISBN: 9780419199106 Category : Architecture Languages : en Pages : 472
Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author: Rafat Siddique Publisher: Springer Science & Business Media ISBN: 3642178669 Category : Technology & Engineering Languages : en Pages : 297
Book Description
This book is an attempt to consolidate the published research related to the use of Supplementary Cementing Materials in cement and concrete. It comprises of five chapters. Each chapter is devoted to a particular supplementing cementing material. It is based on the literature/research findings published in journals/conference proceeding, etc. Topics covered in the book are; coal fly ash, silica fume (SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Each chapter contains introduction, properties of the waste material/by-product, its potential usage, and its effect on the properties of fresh and hardened concrete and other cement based materials.
Author: Pierre-Claude Aïtcin Publisher: Woodhead Publishing ISBN: 0081006969 Category : Technology & Engineering Languages : en Pages : 668
Book Description
Science and Technology of Concrete Admixtures presents admixtures from both a theoretical and practical point-of-view. The authors emphasize key concepts that can be used to better understand the working mechanisms of these products by presenting a concise overview on the fundamental behavior of Portland cement and hydraulic binders as well as their chemical admixtures, also discussing recent effects in concrete in terms of rheology, mechanics, durability, and sustainability, but never forgetting the fundamental role played by the water/binder ratio and proper curing in concrete technology. Part One presents basic knowledge on Portland cement and concrete, while Part Two deals with the chemical and physical background needed to better understand what admixtures are chemically, and through which mechanism they modify the properties of the fresh and hardened concrete. Subsequent sections present discussions on admixtures technology and two particular types of concrete, self-consolidating and ultra-high strength concretes, with final remarks on their future. - Combines the knowledge of two leading authors to present both the scientific and technology of admixtures - Explains what admixtures are from a chemical point-of-view and illustrates by which mechanisms they modify the properties of fresh and hardened concrete - Presents a fundamental, practical, and innovative reference book on the topic - Contains three detailed appendices that can be used to learn how to use admixtures more efficiently
Author: R N Swamy Publisher: CRC Press ISBN: 0203036638 Category : Architecture Languages : en Pages : 288
Book Description
This book reviews the fundamental causes and spectrum effects of ASR. It considers he advances that have been made in our understanding of this problem throughout the world.
Author: Bjorn Mysen Publisher: Elsevier ISBN: 0444637095 Category : Science Languages : en Pages : 722
Book Description
Silicate Glasses and Melts, Second Edition describes the structure-property-composition relationships for silicate glasses and melts from a geological and industrial perspective. Updated sections include (i) characterization of silicate melt and COHN fluid structure (with and without dissolved silicate components) with pressure, temperature, and redox conditions and responses of structural variables to chemical composition, (ii) determination of solubility and solution mechanisms of COHN volatiles in silicate melts and minerals and of solubility and solution mechanisms of silicate components in COHN fluids, and (iii) effects of very high pressure on structure and properties of melts and glasses. This new book is an essential resource for researchers in a number of fields, including geology, geophysics, geoscience, volcanology, material science, glass science, petrology and mineralogy. - Brings together multidisciplinary research scattered across the scientific literature into one reference, with a focus on silicate melts and their application to natural systems - Emphasizes linking melt properties to melt structure - Includes a discussion of the pros and cons of the use of glass as a proxy for melt structure and properties - Written by highly regarded experts in the field who, among other honors, were the 2006 recipients of the prestigious G.W. Morey award of the American Ceramic Society
Author: Christopher J. Spragg Publisher: ASTM International ISBN: 080312046X Category : Composite material Languages : en Pages : 206
Book Description
Emphasizing fiber-matrix adhesion and its characterization in composite materials, reports results from applying the most commonly used test methods, such as fragmentation, pull-out, and indentation, to high-performance composites and their constituents. The 13 papers were presented at a symposium i
Author: Taoufik Boukharouba Publisher: Springer ISBN: 3030118274 Category : Science Languages : en Pages : 196
Book Description
This book covers a variety of topics in mechanics, with a special emphasis to fluid mechanics and energy transfer. Chapters are based on selected contributions presented during the Algerian Congress of Mechanics (CAM 2017), held on November 26 - 30, 2017, in Constantine, Algeria. The book covers theoretical analysis, modeling, and numerical treatment of performance-related problems of new refrigeration systems, heating and cooling. It reports on experimental research to solve problems related to the flow of microfluids, and relevant applications in the areas of chemical engineering, biochemistry, biomedicine and renewable energy. Further topics include methods for maintenance of mechanical structures, strength, wear, fracture, damage and life of structures, and image processing solutions for the design and 3D manufacturing of mechanical parts. Improvement, control and regulation of urban road traffic are also discussed in this book, thus offering a comprehensive, practice-oriented reference guide for academics and professionals.
Author: Bhagwanjee Jha Publisher: Springer ISBN: 9811014043 Category : Technology & Engineering Languages : en Pages : 233
Book Description
This book presents a thorough review of the state-of-knowledge and recent innovations in the synthesis of pure and improved grades of fly ash zeolites (FAZ). Addressing improvements to conventional methods, it also showcases a novel technique for the synthesis of high cation exchangers from fly ash and detailed characterization techniques for the products obtained. In addition, it examines in detail various areas of specific applications of fly ash zeolites. Over the years, several methods such as hydrothermal, fusion prior to hydrothermal, microwave assisted hydrothermal and molten salt techniques for producing FAZ have been developed. However, one-step and two-step reactions between the fly ash and alkali usually generate alkaline wastes that may cause environmental contamination. In addition, the separation of FAZ from the partially activated fly ash (the impurities) remains a major concern for researchers and industrialists alike. /divIn view of these challenges, this book presents a novel technique for three-step activation (TSA), which focuses on recycling the fly ash-NaOH-water reaction by-products until zeolitic residue is formed. The FAZ (the final residue after third step reactions) synthesized in this manner exhibits exceptionally high cation exchange capacity, specific surface area and pore area. This book offers a comprehensive compendium of reading material on fly ash and its recycled product, the zeolites. Students at both undergraduate and graduate levels, researchers, and practicing engineers will all find this book to be a valuable guide in their respective fields.
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Author: 
Author: Don Montague
Author: Rafat Siddique
Author: Pierre-Claude Aïtcin
Author: R N Swamy
Author: Bjorn Mysen
Author: Marc-Andre Berube
Author: Christopher J. Spragg
Author: Taoufik Boukharouba
Author: Bhagwanjee Jha