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Quantification De La Reaction Alcali Silice
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Book Synopsis Repair, Rejuvenation and Enhancement of Concrete by : Ravindra K. Dhir
Download or read book Repair, Rejuvenation and Enhancement of Concrete written by Ravindra K. Dhir and published by Thomas Telford. This book was released on 2002 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is a global material that underwrites commercial wellbeing and social development. There is no substitute that can be used on the same engineering scale and its sustainability, expolitation and further development are imperatives to creating and maintaing a healthy economy and environment worldwide. The pressure for change and improvement of performance is relentless and necessary. Concrete must keep evolving to satisfy the increasing demands of all its users.
Book Synopsis Quantification de la réaction alcali-silice by : David Bulteel
Download or read book Quantification de la réaction alcali-silice written by David Bulteel and published by . This book was released on 2000 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: La reaction alcali-silice est un processus de degradation interne des betons mettant en jeu les phases siliceuses du granulat, les alcalins de la solution interstitielle du beton et la portlandite. Le but de notre etude est de mieux comprendre le mecanisme reactionnel et de determiner des variables d'avancement qui soient specifiques a la reaction alcali-silice. Cette etude a ete effectuee sur un silex classe comme potentiellement reactif a effet de pessimum. Nous avons etudie la reaction a travers deux milieux reactionnels modeles representatifs du milieu reel qu'est le beton : l'un riche en alcalins et l'autre pauvre. Nous avons montre que l'etape ultime de la reaction alcali-silice est une dissolution des tetraedres de silicium q 4 de coordinence quatre. Cette dissolution est precedee par la coupure de liaisons siloxanes qui contribue a la formation dans le reseau solide de tetraedres de type q 3 de coordinence trois. Ces structures q 3 correspondent soit a des silanols soit sont ionisees par les ions hydroxyles puis neutralisees par les ions potassium et calcium. Grace a une modelisation du bilan matiere de la reaction nous avons pu determiner la fraction de silice dissoute, la fraction de q 3 de type silanols et la fraction de q 3 ionises a chaque instant. Au fur et a mesure que la reaction progresse la concentration en ions hydroxyles diminue et la formation des structures q 3 l'emporte sur la phase de dissolution. Cette accumulation de structure q 3 dans le reseau solide se traduit par reduction de la densite absolue du granulat. Toutefois, aucune fissuration interne des granulats n'a ete observee. L'etude cinetique a montre que la vitesse de dissolution est une fonction croissante de la concentration en ions hydroxyles.
Book Synopsis The Alkali-silica Reaction by : Maarten A. T. M. Broekmans
Download or read book The Alkali-silica Reaction written by Maarten A. T. M. Broekmans and published by . This book was released on 2002 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Mineralogy of Cement & Concrete by : Maarten A.T.M. Broekmans
Download or read book Applied Mineralogy of Cement & Concrete written by Maarten A.T.M. Broekmans and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 74 of Reviews in Mineralogy and Geochemistry contains a selection of papers on the applied mineralogy of cement and concrete, by far the most popular modern building material by volume, with an annual production exceeding 9 billion cubic meters, and steadily growing. Not even all 'concrete' topics can be covered by a single volume, but an interesting assortment was finally obtained. The seven chapters deal with mineralogy and chemistry of (alumina) clinker production and hydration (Pöllmann), alternative raw clinkering materials to reduce CO2 emission (Justnes), assessment of clinker constituents by optical and electron microscopy (Stutzman), industrial assessment of raw materials, cement and concrete using X-ray methods in different applications (Meier et al.), in situ investigation of clinker and cement hydration based on quantitative crystallographic phase analysis (Aranda et al.), characterization and properties of supplementary cementitious materials (SCMs) to improve cement and concrete properties (Snellings et al.), and deleterious alkali-aggregate reaction (AAR) in concrete (Broekmans).
Book Synopsis Advanced Chemical and Creep Modeling for Alkali-Aggregate Reaction in Concrete by : Fernando A. N. Silva
Download or read book Advanced Chemical and Creep Modeling for Alkali-Aggregate Reaction in Concrete written by Fernando A. N. Silva and published by Springer Nature. This book was released on with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Modeling of AAR by : Victor Saouma
Download or read book Numerical Modeling of AAR written by Victor Saouma and published by CRC Press. This book was released on 2014-02-05 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference book presents the theory and methodology to conduct a finite element assessment of concrete structures subjected to chemically induced volumetric expansion in general and alkali aggregate reaction in particular. It is limited to models developed by the author, and focuses on how to best address a simple question: if a structure suffers from AAR, how is its structural integrity jeopardized, and when would the reaction end. Subjects treated are: • Brief overview of AAR: nature of the chemical reactions, AAR in both dams and nuclear power plants, and how does it impact the mechanical properties of concrete. • Constitutive model for both the AAR expansion, and concrete nonlinearities (both smeared and discrete crack models). • Validation of the model along with a parametric study to assess what are the critical parameters in a study. • Selection of material properties for an AAR finite element simulation, followed by applications in dams and massive reinforced concrete structures. • Micro Model for improved understanding of the essence of the reaction, along with a newly proposed mathematical model for the kinetics of the reaction. • Review of relevant procedures to estimate the residual expansion of a structure suffering from AAR, along with a proposed approach to determine when the reaction will end. The book is extensively illustrated with numerous figures and provides guidance to engineers confronted with swelling in concrete infrastructures.
Book Synopsis Swelling Concrete in Dams and Hydraulic Structures by : Alain Sellier
Download or read book Swelling Concrete in Dams and Hydraulic Structures written by Alain Sellier and published by John Wiley & Sons. This book was released on 2017-07-21 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: The swelling of concrete is a major concern for the owners and operators of dams and hydraulic structures. Faced with irreversible movement of their dams or with observations of cracking processes, operators need to explain the phenomena observed in order to justify safety conditions and in some cases to plan remedial works. Over the last 20 years, active research has been carried out in the field, resulting in practical results in phenomena interpretation and dam modeling. At the same time, an increasing number of affected dams have undergone safety re-evaluations and in some cases remedial work. Several of them have been removed altogether. Although it remains difficult to establish a “state of the art” in this domain due to the rapidly changing context, regular international exchanges in the field appear fruitful and necessary. Following on from previous conferences in the field organized by Robin Charlwood, former President of the ICOLD Concrete Committee, the initiative was taken by EDF and Toulouse University-LMDC to organize a workshop to provide a new opportunity for sharing experience. The aim of this workshop is to assemble active researchers, leading engineers, and experts from the practicing community and administration interested directly or indirectly in concrete swelling effects in dams and hydraulic structures. All types of chemical expansion phenomena, including those due to alkali aggregate reactions and those due to ettringite formation, are addressed. These proceedings include 24 papers written by experts renowned in their field, illustrating the need to progress with interdisciplinary approaches.
Book Synopsis Superplasticizers and Other Chemical Admixtures in Concrete by :
Download or read book Superplasticizers and Other Chemical Admixtures in Concrete written by and published by . This book was released on 2006 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Alkali-Aggregate Reaction in Concrete by : Ian Sims
Download or read book Alkali-Aggregate Reaction in Concrete written by Ian Sims and published by CRC Press. This book was released on 2017-08-01 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali-Aggregate Reaction in Concrete: A World Review is unique in providing authoritative and up to date expert information on the causes and effects of Alkali-Aggregate Reaction (AAR) in concrete structures worldwide. In 1992 a first edition entitled The Alkali-Silica Reaction in Concrete, edited by Professor Narayan Swamy, was published in a first attempt to cover this concrete problem from a global perspective, but the coverage was incomplete. This completely new edition offers a fully updated and more universal coverage of the world situation concerning AAR and includes a wealth of new evidence and research information that has accumulated in the intervening years. Although there are various textbooks offering readers sections that deal with AAR deterioration and damage to concrete, no other single book brings together the views of recognised international experts in the field, and the wealth of scattered research information that is available. It provides a ‘state of the art’ review and deals authoritatively with the mechanisms of AAR, its diagnosis and how to treat concrete affected by AAR. It is illustrated by numerous actual examples from around the world, and comprises specialist contributions provided by senior engineers and scientists from many parts of the world. The book is divided into two distinct but complementary parts. The first five chapters deal with the most recent findings concerning the mechanisms involved in the reaction, methods concerning its diagnosis, testing and evaluation, together with an appraisal of current methods used in its avoidance and in the remediation of affected concrete structures. The second part is divided into eleven chapters covering each region of the world in turn. These chapters have been written by experts with specialist knowledge of AAR in the countries involved and include an authoritative appraisal of the problem and its solution as it affects concrete structures in the region. Such an authoritative compilation of information on AAR has not been attempted previously on this scale and this work is therefore an essential source for practising and research civil engineers, consultant engineers and materials scientists, as well as aggregate and cement producers, designers and concrete suppliers, especially regarding projects outside their own region.
Book Synopsis Twenty-Seventh International Congress on Large Dams Vingt-Septième Congrès International des Grands Barrages by : ICOLD CIGB
Download or read book Twenty-Seventh International Congress on Large Dams Vingt-Septième Congrès International des Grands Barrages written by ICOLD CIGB and published by CRC Press. This book was released on 2022-05-20 with total page 3287 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Committee on Large Dams (ICOLD) held its 27th International Congress in Marseille, France (12-19 November 2021). The proceedings of the congress focus on four main questions: 1. Reservoir sedimentation and sustainable development; 2. Safety and risk analysis; 3. Geology and dams, and 4. Small dams and levees. The book thoroughly discusses these questions and is indispensable for academics, engineers and professionals involved or interested in engineering, hydraulic engineering and related disciplines.
Book Synopsis Proceedings of Italian Concrete Days 2016 by : Marco di Prisco
Download or read book Proceedings of Italian Concrete Days 2016 written by Marco di Prisco and published by Springer. This book was released on 2018-04-16 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the best peer-reviewed papers presented at the Italian Concrete Days national conference, held in Rome, Italy, on October 27-28, 2016. The conference topics encompass the aspects of design, execution, rehabilitation and control of concrete structures, with particular reference to theory and modeling, applications and realizations, materials and investigations, technology and construction techniques. The contributions amply demonstrate that today’s structural concrete applications concern not only new constructions, but more and more rehabilitation, conservation, strengthening and seismic upgrading of existing premises, and that requirements cover new aspects within the frame of sustainability, including environmental friendliness, durability, adaptability and reuse of works and / or materials. As such the book represents an invaluable, up-to-the-minute tool, providing an essential overview of structural concrete, as well as all new materials with cementitious matrices.
Author :International Union of Testing and Research Laboratories for Materials and Structures Publisher :RILEM Publications ISBN 13 :9782912143082 Total Pages :408 pages Book Rating :4.1/5 (43 download)
Book Synopsis Engineering and Transport Properties of the Interfacial Transition Zone in Cementitious Composites by : International Union of Testing and Research Laboratories for Materials and Structures
Download or read book Engineering and Transport Properties of the Interfacial Transition Zone in Cementitious Composites written by International Union of Testing and Research Laboratories for Materials and Structures and published by RILEM Publications. This book was released on 1999 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Modeling Strategies for Sustainable Concrete Structures by : Pierre Rossi
Download or read book Numerical Modeling Strategies for Sustainable Concrete Structures written by Pierre Rossi and published by Springer Nature. This book was released on 2022-06-30 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of sustainable concrete structures, as presented by scientists and engineers at the RILEM International Conference on Numerical Modeling Strategies for Sustainable Concrete Structures (SSCS), held in Marseille, France, on July 4-6, 2022. It demonstrates that numerical methods (finite elements, finite volumes, finite differences) are a relevant response to the challenge to optimize the utilization of cement in concrete constructions while checking that these constructions have a lifespan compatible with the stakes of sustainable development. They are indeed accurate tools for an optimized design of concrete constructions, and allow us to consider all types of complexities: for example, those linked to rheological, physicochemical and mechanical properties of concrete, those linked to the geometry of the structures or even to the environmental boundary conditions. This optimization must also respect constraints of time, money, security, energy, CO2 emissions, and, more generally, life cycle more reliably than the codes and analytical approaches currently used. Numerical methods are, undoubtedly, the best calculation tools at the service of concrete eco-construction. The contributions present traditional and new ideas that will open novel research directions and foster multidisciplinary collaboration between different specialists.
Download or read book Geologica Ultraiectina written by and published by . This book was released on 1971 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Mechanics by : M. W. Yuan
Download or read book Computational Mechanics written by M. W. Yuan and published by 清华大学出版社有限公司. This book was released on 2004 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete by : Leandro F. M. Sanchez
Download or read book Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete written by Leandro F. M. Sanchez and published by Springer Nature. This book was released on with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revue Roumaine de Chimie written by and published by . This book was released on 2005 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
