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Influence Des Caracteristiques Rheologiques Des Betons Autoplacants Sur Leur Durabilite
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Book Synopsis Influence Des Caractéristiques Rhéologiques Des Bétons Autoplaçants Sur Leur Durabilité by : Baudouin Maïco Aïssoun
Download or read book Influence Des Caractéristiques Rhéologiques Des Bétons Autoplaçants Sur Leur Durabilité written by Baudouin Maïco Aïssoun and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence de la température sur la thixotropie des bétons autoplaçants by : Benjamin Helnan-Moussa
Download or read book Influence de la température sur la thixotropie des bétons autoplaçants written by Benjamin Helnan-Moussa and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de cette thèse est d'étudier l'influence de la température sur la thixotropie des bétons autoplaçants (BAP). L'intérêt de ce travail s'inscrit dans la perspective d'optimiser les formulations des BAP dans une large gamme de température. Un plan factoriel composite centré a été adopté dans le but de minimiser le nombre d'essais tout en étudiant les effets des facteurs (température et dosage en agent de viscosité (AV)) et leurs interactions sur les propriétés rhéologiques des BAP.La première phase de l'étude consistait à quantifier la thixotropie du béton juste après le malaxage et durant la période dormante en fonction du dosage en AV à des températures comprises entre 11.3 et 30.7°C selon le protocole proposé par Wallevik sur le rhéomètre BML4. Les résultats ont montré que l'indice de thixotropie présente un minimum respectivement pour un dosage en AV de 0.28 % (par rapport à la masse d'eau) et une température de 24°C. Cependant, ce protocole ne permet pas d'étudier la déstructuration des BAP, facteur recherché par exemple dans les coulages multicouches. Nous avons donc été amenés à retenir un protocole utilisé dans les gels et appelé protocole Dolz. L'application de ce dernier aux pâtes de ciment et aux BAP a permis de mettre en évidence une nouvelle grandeur, le potentiel de déstructuration K. Les valeurs du potentiel K montrent qu'au delà d'un certain dosage en AV et d'une certaine température, apparaissent des phénomènes d'encombrement qui réduisent le potentiel K. Ainsi, le potentiel K apporte des informations complémentaires pour l'aide à la sélection de dosages adéquats du couple superplastifiant - agent de viscosité en fonction de la température de coulage.
Book Synopsis Influence du type d'addition minérale sur le comportement physico-mécanique et sur la durabilité des bétons autoplaçants by : Hocine Siad
Download or read book Influence du type d'addition minérale sur le comportement physico-mécanique et sur la durabilité des bétons autoplaçants written by Hocine Siad and published by . This book was released on 2010 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: En raison des spécificités relatives à la formulation des bétons autoplaçants (BAP) et en particulier ce qui concerne leur volume élevé en pâte et la présence d’ajouts minéraux en grande quantité, leur comportement à l’état frais et à l’état durci ainsi que leur durabilité sont fortement influencés par ces deux paramètres. Ce travail de recherche vise à apporter une contribution à la valorisation de la pouzzolane naturelle de Béni-Saf (Algérie) en tant qu’addition minérale dans la composition de bétons autoplaçants économiques. Il s’agit de comparer l’influence de la nature des ajouts minéraux (pouzzolane naturelle, cendre volante et filler calcaire) sur les caractéristiques physicomécaniques et sur la durabilité de ces bétons à court terme (28 jours), à moyen terme (90 jours) et à long terme (360 jours). Au total, douze formulations ont été étudiées, elles couvrent trois différentes classes de résistances (30 MPa, 50 MPa et 70 MPa) et quatre types de bétons : un béton ordinaire vibré (BOV), un BAP à base de pouzzolanes naturelles (BAP PZ), un BAP à base de fillers calcaires (BAP FC) et un BAP à base de cendres volantes (BAP CV). Les résultats de la résistance à la compression obtenus sont très proches selon la classe de résistance pour les trois additions minérales utilisées dans les BAP. Les résultats des essais d’arrachement (pull-out test), de l’absorption capillaire, de la porosité accessible à l’eau et au mercure, du coefficient de diffusion des ions chlorures, de la perméabilité à l’hélium, de l’attaque acide (HCl et H2SO4) et de l’attaque sulfatique Na2SO4, montrent que la nature de l’addition minérale dans les BAP influe considérablement les propriétés physico-mécaniques et la durabilité de ces bétons. Les BAP contenant de la pouzzolane naturelle (BAP PZ) représentent non seulement un intérêt économique, mais aussi des performances très comparables à celles obtenues sur des BAP à base de cendres volantes (BAP CV) et bien meilleures que celles sur des BAP formulés avec du filler calcaire. Par ailleurs, Les BAP PZ et les BAP CV présentent des valeurs de retrait acceptables mais légèrement supérieures à celles des autres bétons.
Book Synopsis Eco-efficient Repair and Rehabilitation of Concrete Infrastructures by : Fernando Pacheco-Torgal
Download or read book Eco-efficient Repair and Rehabilitation of Concrete Infrastructures written by Fernando Pacheco-Torgal and published by Elsevier. This book was released on 2024-03-22 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eco-efficient Repair and Rehabilitation of Concrete Infrastructures, Second Edition provides an updated state-of-the-art review on the latest advances in this important research field. The first section is brought fully up-to-date and focuses on deterioration assessment methods. Section two contains brand new chapters on innovative concrete repair and rehabilitation materials including: fly ash-based alkali-activated repair materials for concrete exposed to aggressive environments; repairing concrete structures with alkali-activated metakaolin mortars; concrete with micro encapsulated self-healing materials; concrete repaired with bacteria; concrete structures repaired with engineered cementitious composites; concrete repaired by electrodeposition; the assessment of concrete after repair operations and durability of concrete repair. The final section has also been amended to include six new chapters on design, Life-cycle cost analysis and life-cycle assessment. These chapters include maintenance strategies for concrete structures; a comparison of different repair methods; life cycle assessment of the effects of climate change on bridge deterioration; life-cycle-cost benefits of cathodic protection of concrete structures; life-cycle cost analyses for concrete bridges exposed to chlorides and life-cycle analysis of repair of concrete pavements. The book will be an essential reference resource for materials scientists, civil and structural engineers, architects, structural designers and contractors working in the construction industry. Covers the latest research findings on eco-efficient repair and rehabilitation of concrete infrastructures Provides comprehensive coverage from damage detection and assessment, to repair strategies and structural health monitoring Presents a diverse author base that offers insights on construction practice and employed technologies worldwide Includes an entire section on NDT, innovative repair, and rehabilitation materials, as well as case studies on lifecycle cost analysis and lifecycle assessment
Book Synopsis Rheology of Fresh Cement and Concrete by : P.F.G. Banfill
Download or read book Rheology of Fresh Cement and Concrete written by P.F.G. Banfill and published by CRC Press. This book was released on 1990-09-27 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together new research information on the flow behaviour of cementitious materials from the UK, France, Italy, Germany, Poland, Finland, USSR, USA and Japan, presented at the International Conference organised by the British Society of Rheology in March 1990.
Book Synopsis First RILEM International Conference on Concrete and Digital Fabrication – Digital Concrete 2018 by : Timothy Wangler
Download or read book First RILEM International Conference on Concrete and Digital Fabrication – Digital Concrete 2018 written by Timothy Wangler and published by Springer. This book was released on 2018-08-29 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital fabrication has been termed the “third industrial revolution”, and is promising to revolutionize many disciplines, including most recently the construction sector. Both academia and industry see immense promise in cementitious materials, which lend themselves well to additive manufacturing techniques for digital fabrication in construction. With this recent trend and high interest in this new research field, the 1st RILEM International Conference on Concrete and Digital Fabrication (Digital Concrete 2018) was organized. Since 2014, ETH Zurich has been host for the Swiss National Centre for Competence in Research (NCCR) for Digital Fabrication in Architecture, which is highly interdisciplinary and unique worldwide. In 2018, this NCCR opened the “DFAB House”, which incorporates many digital fabrication principles for architecture. It is also responsible for the 600 m2 Robotic Fabrication Lab and the first robotically built roof in the world. Held in tandem with Rob|Arch 2018, the leading conference for robotics in architecture, RILEM deemed it the right time to combine forces at this new conference, which will be the first large conference to feature the work of the recently created RILEM Technical Committee on Digital Fabrication with Cement-based Materials, among other leaders in this new field worldwide. This conference proceedings brings together papers that take into account the findings in this new area. Papers reflect the varying themes of the conference, including Materials, Processing, Structure, and Applications.
Book Synopsis Robotic Fabrication in Architecture, Art and Design 2018 by : Jan Willmann
Download or read book Robotic Fabrication in Architecture, Art and Design 2018 written by Jan Willmann and published by Springer. This book was released on 2018-08-25 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents research from Rob|Arch 2018, the fourth international conference on robotic fabrication in architecture, art, and design. In capturing the myriad of scientific advances in robotics fabrication that are currently underway – such as collaborative design tools, computerised materials, adaptive sensing and actuation, advanced construction, on-site and cooperative robotics, machine-learning, human-machine interaction, large-scale fabrication and networked workflows, to name but a few – this compendium reveals how robotic fabrication is becoming a driver of scientific innovation, cross-disciplinary fertilization and creative capacity of an unprecedented kind.
Book Synopsis Quantitative Laws in Biological Chemistry by : Svante Arrhenius
Download or read book Quantitative Laws in Biological Chemistry written by Svante Arrhenius and published by . This book was released on 1915 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods of Testing Cement by : British Standards Institution
Download or read book Methods of Testing Cement written by British Standards Institution and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Micro- & Mesoporous Materials by : K. Hadjiivanov
Download or read book Advanced Micro- & Mesoporous Materials written by K. Hadjiivanov and published by Heron Press. This book was released on 2008-10-31 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling and Simulation in Thermal and Chemical Engineering by : J. Thoma
Download or read book Modelling and Simulation in Thermal and Chemical Engineering written by J. Thoma and published by Springer Science & Business Media. This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main object of this book is modeling and simulation of energetic processes by bond graphs. But even without knowledge of this powerful method it can be used to a certain extent as an introduction to simulation in thermodynamics. The book addresses advanced students, lecturers and researchers in mechanical engineering and automation as well as experienced engineers in process industries.
Book Synopsis Progress in Clean Energy, Volume 2 by : Ibrahim Dincer
Download or read book Progress in Clean Energy, Volume 2 written by Ibrahim Dincer and published by Springer. This book was released on 2015-11-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This expansive reference provides readers with the broadest available single-volume coverage of leading-edge advances in the development and optimization of clean energy technologies. From innovative biofuel feed stocks and processing techniques, to novel solar materials with record-breaking efficiencies, remote-sensing for offshore wind turbines to breakthroughs in high performance PEM fuel cell electrode manufacturing, phase change materials in green buildings to bio sorption of pharmaceutical pollutants, the myriad exciting developments in green technology described in this book will provide inspiration and information to researchers, engineers and students working in sustainability around the world.
