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Author: Amira Kahouadji
Publisher:
ISBN:
Category :
Languages : fr
Pages : 181
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Book Description
Le travail présenté dans ce mémoire est une contribution à l'étude des variations thermiques et hygrométriques des bétons de sable fluides et de leur influence sur les déformations de retrait de ces bétons. Nous avons d'abord cherché à faire le point sur les connaissances actuelles concernant le retrait des bétons de sable. Nous avons aussi recensé et analysé les trois principaux modèles existants, pour choisir si possible à la fois le plus efficace et celui pouvant être physiquement le mieux justifié. Des essais de conductimétrie, de calorimétrie, le suivi de la cinétique de séchage des matériaux, des observations d'échantillons au microscope électronique à balayage et l'analyse de leurs porométrie au moyen du porosimètre à mercure, ont été choisis pour caractériser la microstructure. L'étude expérimentale a concerné le retrait plastique, le retrait endogène, le retrait de dessication et les résistances respectives des bétons. Ont été suivies parallèlement, les déformations des bétons de sable pour différentes conditions de température (T=20°C et 30 °C) et d'hygrométrie (HR=50, 60, 70, et 90%) et leur perte de masse au cours du temps. Une approche de la modélisation du retrait est également proposée. La possibilité d'évaluer le retrait endogène en fonction des résistances et le retrait de dessiscation en fonction des compositions et des dosages, permet de réduire de manière conséquente le nombre d'essais préliminaires.
Author: Amira Kahouadji
Publisher:
ISBN:
Category :
Languages : fr
Pages : 181
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Book Description
Le travail présenté dans ce mémoire est une contribution à l'étude des variations thermiques et hygrométriques des bétons de sable fluides et de leur influence sur les déformations de retrait de ces bétons. Nous avons d'abord cherché à faire le point sur les connaissances actuelles concernant le retrait des bétons de sable. Nous avons aussi recensé et analysé les trois principaux modèles existants, pour choisir si possible à la fois le plus efficace et celui pouvant être physiquement le mieux justifié. Des essais de conductimétrie, de calorimétrie, le suivi de la cinétique de séchage des matériaux, des observations d'échantillons au microscope électronique à balayage et l'analyse de leurs porométrie au moyen du porosimètre à mercure, ont été choisis pour caractériser la microstructure. L'étude expérimentale a concerné le retrait plastique, le retrait endogène, le retrait de dessication et les résistances respectives des bétons. Ont été suivies parallèlement, les déformations des bétons de sable pour différentes conditions de température (T=20°C et 30 °C) et d'hygrométrie (HR=50, 60, 70, et 90%) et leur perte de masse au cours du temps. Une approche de la modélisation du retrait est également proposée. La possibilité d'évaluer le retrait endogène en fonction des résistances et le retrait de dessiscation en fonction des compositions et des dosages, permet de réduire de manière conséquente le nombre d'essais préliminaires.
Author: Francois de Larrard
Publisher: CRC Press
ISBN: 9780419235002
Category : Architecture
Languages : en
Pages : 450
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Book Description
The design of concrete mixes is becoming increasingly complex, with the addition of new materials in the compounds, such as organic admixtures, fibres and supplementary cementitious materials. Moreover, the list of properties which concretes are required to possess for certain applications has increased, and interest is developing in rheology, durability, deformability and whole-life behaviour. This book presents a number of simple models for the understanding of a concrete system, and provides the techniques for developing more sophisticated models for the practical design of concrete mixes.
Author: Jean Baudrillard
Publisher: University of Michigan Press
ISBN: 9780472065219
Category : Art
Languages : en
Pages : 174
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Book Description
Develops a theory of contemporary culture that relies on displacing economic notions of cultural production with notions of cultural expenditure. This book represents an effort to rethink cultural theory from the perspective of a concept of cultural materialism, one that radically redefines postmodern formulations of the body.
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
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: Sofiane Amziane
Publisher: John Wiley & Sons
ISBN: 111857706X
Category : Technology & Engineering
Languages : en
Pages : 332
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Book Description
Using plant material as raw materials for construction is a relatively recent and original topic of research. This book presents an overview of the current knowledge on the material properties and environmental impact of construction materials made from plant particles, which are renewable, recyclable and easily available. It focuses on particles and as well on fibers issued from hemp plant, as well as discussing hemp concretes. The book begins by setting the environmental, economic and social context of agro-concretes, before discussing the nature of plant-based aggregates and binders. The formulation, implementation and mechanical behavior of such building materials are the subject of the following chapters. The focus is then put upon the hygrothermal behavior and acoustical properties of hempcrete, followed by the use of plant-based concretes in structures. The book concludes with the study of life-cycle analysis (LCA) of the environmental characteristics of a banked hempcrete wall on a wooden skeleton. Contents 1. Environmental, Economic and Social Context of Agro-Concretes, Vincent Nozahic and Sofiane Amziane. 2. Characterization of Plant-Based Aggregates. Vincent Picandet. 3. Binders, Gilles Escadeillas, Camille Magniont, Sofiane Amziane and Vincent Nozahic. 4. Formulation and Implementation, Christophe Lanos, Florence Collet, Gérard Lenain and Yves Hustache. 5. Mechanical Behavior, Laurent Arnaud, Sofiane Amziane, Vincent Nozahic and Etienne Gourlay. 6. Hygrothermal Behavior of Hempcrete, Laurent Arnaud, Driss Samri and Étienne Gourlay. 7. Acoustical Properties of Hemp Concretes, Philippe Glé, Emmanuel Gourdon and Laurent Arnaud. 8. Plant-Based Concretes in Structures: Structural Aspect – Addition of a Wooden Support to Absorb the Strain, Philippe Munoz and Didier Pipet. 9. Examination of the Environmental Characteristics of a Banked Hempcrete Wall on a Wooden Skeleton, by Lifecycle Analysis: Feedback on the LCA Experiment from 2005, Marie-Pierre Boutin and Cyril Flamin. About the Authors Sofiane Amziane is Professor and head of the Civil Engineering department at POLYTECH Clermont-Ferrand in France. He is also in charge of the research program dealing with bio-based building materials at Blaise Pascal University (Institut Pascal, Clermont Ferrand, France). He is the secretary of the RILEM Technical Committee 236-BBM dealing with bio-based building materials and the author or co-author of over one hundred papers in scientific journals such as Cement and Concrete Research, Composite Structures or Construction Building Materials as well as international conferences. Laurent Arnaud is a Bridges, Waters and Forestry Engineer (Ingénieur des Ponts, Eaux et Forêts) and researcher at Joseph Fourier University in Grenoble, France. He is also Professor at ENTPE (Ecole Nationale des Travaux Publics de l’Etat). Trained in the field of mechanical engineering, his research has been directed toward the characterization and development of new materials for civil engineering and construction. He is head of the international committee at RILEM – BBM, as well as the author of more than one hundred publications, and holder of an international invention patent.
Author: Carolyn Côté-Lussier
Publisher: University of Ottawa Press
ISBN: 0776628720
Category : Social Science
Languages : en
Pages : 396
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Book Description
Contemporary Criminological Issues tackles some of today’s most pressing social issues, from the criminalization of Indigenous peoples to interpersonal violence, border control, and armed conflicts. This book advances cutting-edge theories and methods, with the aim of moving beyond the scholarship that reproduces insecurity and exclusion. The breadth of approaches encompasses much of the current critical criminological scholarship, serving as a counterpoint to the growth of managerial and administrative criminologies and the rise of explicitly exclusionary and punitive state policies and practices with respect to ‘crime’ and ‘security.’ This edited collection featuring two books, one in English and one in French, includes important contributions to knowledge and public policy by eminent experts and emerging scholars. This book is published in English.
Author: Ólafur H. Wallevik
Publisher: RILEM Publications
ISBN: 9782912143426
Category : Concrete
Languages : en
Pages : 1062
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Book Description
Author: International Livestock Research Institute
Publisher: ILRI (aka ILCA and ILRAD)
ISBN: 9789291460038
Category : Animal industry
Languages : en
Pages : 268
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Book Description
Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author: International Atomic Energy Agency
Publisher: International Atomic Energy Agency
ISBN: 9789201063205
Category : Technology & Engineering
Languages : en
Pages : 72
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Book Description
This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Author: Janine M. Benyus
Publisher: Harper Collins
ISBN: 0061958921
Category : Science
Languages : en
Pages : 324
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Book Description
Repackaged with a new afterword, this "valuable and entertaining" (New York Times Book Review) book explores how scientists are adapting nature's best ideas to solve tough 21st century problems. Biomimicry is rapidly transforming life on earth. Biomimics study nature's most successful ideas over the past 3.5 million years, and adapt them for human use. The results are revolutionizing how materials are invented and how we compute, heal ourselves, repair the environment, and feed the world. Janine Benyus takes readers into the lab and in the field with maverick thinkers as they: discover miracle drugs by watching what chimps eat when they're sick; learn how to create by watching spiders weave fibers; harness energy by examining how a leaf converts sunlight into fuel in trillionths of a second; and many more examples. Composed of stories of vision and invention, personalities and pipe dreams, Biomimicry is must reading for anyone interested in the shape of our future.
