Use of Permeable Formwork in Placing and Curing Concrete PDF Download
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Author: P. G. Malone
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 58
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Book Description
Permeable framework is a special class of lined formwork used to produce improvements in the strength and durability of concrete. The bracing and the liner in the formwork are engineered to resist the pressure of plastic (or fresh) concrete, but to allow trapped air and excess water to pass through and be removed during concrete placement and consolidation. The objective in using permeable formwork is to eliminate voids on the surface of the concrete (bug holes) and to increase the strength and durability of the concrete surface immediately behind the formwork. A review of permeable formwork and its use in placing concrete was conducted. Methods, techniques, and materials are discussed, and example applications are described. Benefits of using permeable formwork include a reduction in bug holes and surface defects, improved resistance to freezing and thawing, reduced rates of surface carbonation and chloride-ion infiltration, increased surface strength, reduced form coating requirements, reduced efforts in curing, and reduced surface preparation for coating. The cost of using permeable formwork varies greatly among job sites. However, the cost of using permeable formwork will generally be double that for conventional impermeable formwork. Cost savings can be realized in the extended life of any wooden formwork used behind the filter fabric, the ability to proceed without applying form-release compounds, the decreased cost of final surface preparation (if coatings are to be applied to the finished concrete), and the increased service life of the finished concrete.
Author: P. G. Malone
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 58
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Book Description
Permeable framework is a special class of lined formwork used to produce improvements in the strength and durability of concrete. The bracing and the liner in the formwork are engineered to resist the pressure of plastic (or fresh) concrete, but to allow trapped air and excess water to pass through and be removed during concrete placement and consolidation. The objective in using permeable formwork is to eliminate voids on the surface of the concrete (bug holes) and to increase the strength and durability of the concrete surface immediately behind the formwork. A review of permeable formwork and its use in placing concrete was conducted. Methods, techniques, and materials are discussed, and example applications are described. Benefits of using permeable formwork include a reduction in bug holes and surface defects, improved resistance to freezing and thawing, reduced rates of surface carbonation and chloride-ion infiltration, increased surface strength, reduced form coating requirements, reduced efforts in curing, and reduced surface preparation for coating. The cost of using permeable formwork varies greatly among job sites. However, the cost of using permeable formwork will generally be double that for conventional impermeable formwork. Cost savings can be realized in the extended life of any wooden formwork used behind the filter fabric, the ability to proceed without applying form-release compounds, the decreased cost of final surface preparation (if coatings are to be applied to the finished concrete), and the increased service life of the finished concrete.
Author: Prof. Dr. Servet Soygüder
Publisher: EĞİTİM YAYINEVİ
ISBN: 6256408756
Category : Education
Languages : en
Pages : 104
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Book Description
First of all, I wish Allah's mercy to our brothers and sisters who passed away in the earthquake disaster in Kahramanmaraş on February 6, 2023, patience to their families, and healing to the injured. There is a known fact that it is clearly seen that no other science can develop and be applied without engineering science. From medical devices to space vehicles, from agricultural machinery and robots to underwater robots, from unmanned aerial vehicles to defense robots and vehicles, engineering science and technology are required in all scientific fields and applications. Although engineering science has been widely used in the defense fields of countries in recent years, there is a known fact that it is an indispensable building block of medicine and health fields. We hope that engineering science will serve people and all living things more in peace, tranquility, comfortable life and most importantly in health. The saying "To do business with wisdom is with science" is the energy source that science needs.
Author: Roberto J. Torrent
Publisher: CRC Press
ISBN: 0429012926
Category : Technology & Engineering
Languages : en
Pages : 579
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Book Description
Durability and service life design of concrete constructions have considerable socio-economic and environmental consequences, in which the permeability of concrete to aggressive intruders plays a vital role. Concrete Permeability and Durability Performance provides deep insight into the permeability of concrete, moving from theory to practice, and presents over 20 real cases, such as Tokyo’s Museum of Western Art, Port of Miami Tunnel and Hong Kong-Zhuhai-Macao sea-link, including field tests in the Antarctic and Atacama Desert. It stresses the importance of site testing for a realistic durability assessment and details the "Torrent Method" for non-destructive measurement of air-permeability. It also delivers answers for some vexing questions: Should the coefficient of permeability be expressed in m2 or m/s? How to get a "mean" pore radius of concrete from gas-permeability tests? Why should permeability preferably be measured on site? How can service life of reinforced concrete structures be predicted by site testing of gas-permeability and cover thickness? Practitioners will find stimulating examples on how to predict the coming service life of new structures and the remaining life of existing structures, based on site testing of air-permeability and cover thickness. Researchers will value theoretical principles, testing methods, as well as how test results reflect the influence of concrete mix composition and processing.
Author: Mark West
Publisher: Routledge
ISBN: 1317380924
Category : Architecture
Languages : en
Pages : 565
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Book Description
Concrete is the most used man-made material in the world and is the fundamental physical medium for most of the world’s architecture and construction. The character of concrete is largely the product of the rigid moulds that have shaped it since its invention in antiquity. The advent of flexible moulds, however, marks a radical break from conventional practice – and conventional concrete architecture. The Fabric Formwork Book provides the first comprehensive handbook on the emerging technology of flexible moulds for reinforced concrete architecture. Written by the foremost expert in the field, this book takes a comprehensive and generous approach that includes technical, historical and theoretical aspects of the subject. The book: concentrates on simple flat-sheet formworks contains detailed technical descriptions of how to construct a wide range of formworks for various applications features case studies from around the world critiques the difficulties and advantages in each case it covers provides instruction and guidance on how to model and design fabric-formed structures includes the most comprehensive history of fabric formwork yet published features essays from guest expert authors, which explore the theoretical, historical, and poetic significance of flexibly formed architecture and structures discusses fabric formwork as an exemplary approach to sustainable construction through its simplicity and efficiency. Beautifully designed and illustrated with a superb range of images, diagrams and technical drawings, the book both informs and inspires. Speaking directly and plainly to professionals, students and academics, the language used is both clear and precise, and care is taken to avoid opaque technical or academic jargon. Technical terms, when used, are clearly described and a special glossary is included to make the book as widely accessible as possible.
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 2883940894
Category : Technology & Engineering
Languages : en
Pages : 123
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Book Description
It has long been recognised that corrosion of steel is extremely costly and affects many industry sectors, including concrete construction. The cost of corrosion of steel reinforcement within concrete is estimated at many billions of dollars worldwide. The corrosion of steel reinforcement represents a deterioration of the steel which in turn detrimentally affects its performance and therefore that of the concrete element within which it has been cast. A great amount of work has been undertaken over the years concerning the prevention of corrosion of steel, including the application of coatings, which has included the study of the process of corrosion itself, the properties of reinforcing steels and their resistance to corrosion as well as the design of structures and the construction process. The objective of fib Bulletin 49 is to provide readers with an appreciation of the principles of corrosion of reinforcing steel embedded in concrete and to describe the behaviour of particular steels and their coatings as used to combat the effects of such corrosion. These include galvanised reinforcement, epoxy coated reinforcement, and stainless reinforcing steel. It also provides information on the relative costs of the materials and products which it covers. It does not deal with structure design or the process of construction or with the post-construction phase of structure management including repair. It is hoped that it will nevertheless increase the understanding of readers in the process of corrosion of reinforcing steels and the ability of key materials and processes to reduce its harmful effects.
Author: Paulo J. Cruz
Publisher: CRC Press
ISBN: 1482224615
Category : Technology & Engineering
Languages : en
Pages : 2314
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Book Description
Although the disciplines of architecture and structural engineering have both experienced their own historical development, their interaction has resulted in many fascinating and delightful structures. To take this interaction to a higher level, there is a need to stimulate the inventive and creative design of architectural structures and to persua
Author: Brigitte Battat
Publisher:
ISBN:
Category : Building, Bombproof
Languages : en
Pages : 152
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Book Description
Author: Zhiwu Yu
Publisher: RILEM Publications
ISBN: 9782912143617
Category : Concrete
Languages : en
Pages : 738
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Book Description
Author: Peter C. Taylor
Publisher: CRC Press
ISBN: 0203866134
Category : Technology & Engineering
Languages : en
Pages : 215
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Book Description
Curing is one of those activities that every civil engineer and construction worker has heard of, but in reality does not worry about much. In practice, curing is often low on the list of priorities on the construction site, particularly when budgets and timelines are under pressure. Yet the increasing demands being placed on concrete mixtures also
Author: American Concrete Institute
Publisher: American Concrete Institute
ISBN: 087031176X
Category : Technology & Engineering
Languages : en
Pages : 32
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Book Description
