Download or read book Grout for Prestressing Tendons Basic Requirements written by British Standards Institute Staff and published by . This book was released on 2007-11-30 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grouting, Prestressed concrete, Tendons, Construction materials, Compressive strength, Volume, Dimensional changes, Viscosity, Mixing, Accuracy, Composition, Conformity

Download or read book Grouting of Tendons in Prestressed Concrete written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2002-01-01 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prestressed Concrete is a very efficient form of construction; it takes advantage of the strength of concrete in compression. Developed mainly over the second part of the 20th century, it has proven to be reliable and durable. However, in the 1990's some cause for concern was discovered, first in the UK and followed by many other countries of the world. It appeared that the grout, an important means of protection of the steel against corrosion for internally ducted tendons, was in some cases inadequate. Major investigations followed including physical intrusive examination of ducts, mainly in bridges, and re-writing of procedures, processes and specifications, and in 1998 FIP launched a Task Group to review their advice note "Guidelines for Grouting" which had first been published in 1990. The merger of FIP and CEB in 1998 brought this under the auspices of fib. Structural deficiencies have only been found in a small number of bridges and in most of these cases the cause is clearly identifiable as either design detailing, workmanship or materials. In the UK, the Concrete Society report TR47 "Durable Post-tensioned Concrete Bridges" had been published in 1996, which was the culmination of four years of investigative research, and contained major new specifications and procedures aimed at improving the quality of grouting. In the USA, the Post Tensioning Institute published in 2001 their guide "Specification for Grouting of Post-Tensioned Structures", which also represented major steps forward in materials and testing requirements. The American Segmental Bridge Institute has set up a Committee to re-examine their guidelines, as have many other National Bodies worldwide. In Europe, France has issued a "Fascicule No. 65A" covering requirements for grouting and there are many developments in hand in other countries. Also in Europe, a European Technical Approval Guideline (ETAG) has been published for approval of post-tensioning systems which covers several aspects of grout and grouting. In November 2001 an international workshop was held in Ghent, Belgium on "Durability of Post-Tensioning Tendons" [see fib Bulletin 15] at which international experience was exchanged. The theme was clearly apparent; those bridge owners that have looked, have found some problems with a few of their post-tensioned bridges. In most cases steps are being taken to repair existing bridges, where considered necessary, and to improve future construction by reviewing national specifications. Emphasis is being put on a multi-layer protection strategy whereby protection against corrosion is provided by waterproofing, dense impermeable concrete, sealed ducts and good quality grout. Design detailing and rain water management are seen as important aspects. It was, therefore, timely for fib to publish state-of-the-art guidelines to assist in developing and improving the quality of a major line of defence against corrosion, the cement grout. This document represents a consensus view of current practitioners of what is a rapidly developing awareness of some of the shortcomings of previous practice and suggests improvements. This document is a major update of the previous FIP Guidelines and may be taken as a future basis for updating EN 445-447. New areas include understanding of the deleterious effects of an unstable grout, bleeding and how to avoid it, the importance of training and proper procedures, mix design and testing/trials and some new test procedures. It is now understood and generally accepted that the properties of common grout made from cement and water can be very variable and sometimes unpredictable and such grout is not recommended.

Download or read book Grouting of tendons in prestressed concrete written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1990-01-01 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide deals with the grouting of tendons inside concrete members, using cement grout, and tackles the essential day to day practical matters which produce good grouting. Afer a review of objectives, it looks at ducts, inlets and outlets, grout materials and grout properties, equipment, site preparations, the grouting operation, site control and after-measures.

Download or read book Grout for Prestressing Tendons Test Methods written by British Standards Institute Staff and published by . This book was released on 1997-11 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grouting, Construction materials, Tendons, Prestressed concrete, Testing conditions, Calibration, Compression testing, Moulding (process), Test specimens, Volume measurement

Download or read book Grout for Prestressing Tendons Grouting Procedures written by British Standards Institute Staff and published by . This book was released on 2007-11-30 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grouting, Construction operations, Tendons, Prestressed concrete, Construction equipment, Construction materials, Temperature, Quality control, Inspection

Download or read book Mix Design and Application of Hydraulic Grouts for Masonry Strengthening written by Androniki Miltiadou-Fezans and published by Springer Nature. This book was released on 2022-01-17 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides guidance for the rational design and application of hydraulic grouts, based on a series of specific data (type of masonry, voids' width, targeted strength and durability level, available materials, etc.). To this end, the basic characteristics of a grout, i.e. its injectability (penetrability, fluidity and stability), its strength and durability, are taken into account by means of rational models and quantified expressions of all grout-design parameters. Thus, a holistic, rational mix design methodology for optimization of grout composition is given, permitting the preliminary design of grouts, without having to resort to multiple tests in advance. Moreover, detailed practical guidelines for grouting application and quality control, based on real case studies, are also included. The book attempts to rationalize the entire procedure of this poly-parametric decision-making, keeping however in mind the need for practical engineering solutions.

Download or read book Grout for Prestressing Tendons Specification for Common Grout written by British Standards Institute Staff and published by . This book was released on 1997-11-01 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grouting, Prestressed concrete, Construction materials, Tendons, Compressive strength, Volume, Dimensional changes, Viscosity, Test specimens, Dimensions, Mixing, Accuracy

Download or read book Grouting of Tendons in Prestressed Concrete written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with the grouting of tendons inside concrete members using cement grout, and tackles the day to day matters, which produce good grouting. After a review of objectives, this guide looks at ducts, inlets and outlets, grout materials and grout properties, equipment, site preparations, the grouting operation, site control, and after-measures.

Download or read book Specifications for Structural Concrete ACI 301 05 with Selected ACI References written by American Concrete Institute and published by American Concrete Institute. This book was released on 2005 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acceptance of post tensioning systems for cryogenic applications written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 2021-04-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the Second World War the demand of energy has undergone an exponential growth that has led to a sharp annual increase in the use of natural gas in both, cities and thermal power stations. Nowadays, the strategic relevance of natural gas as a main source of energy is evident with a contribution of more than 20% of the total world consumption. This development in increasing demand of natural gas has led for a need of suitable storage and transportation infrastructure. Various gases, especially hydrocarbons, are preferably stored in liquid form for transportation and storage since the phase transformation from gas to liquid comes with a significant reduction of the volume (e.g. up to 600 times). Gases can be liquefied by raising the pressure or by cooling to their boiling point, which for most gases is below 0°C. This is known as cryogenic storage. The term cryogenic is derived from two Greek words, namely kryos meaning icy-cold and genes which can be translated as shape. These fib recommendations are concerned about post-tensioning systems used in cryogenic tanks and have been formulated on the basis of actual available knowledge with the aim to reflect the current state of the art. Consequently, these recommendations have included a classification of the different cryogenic tanks typologies used in the past and nowadays, the associated different tendon types depending on their exposure to low temperature (e.g. never, only accidentally or during normal tank operation) and the testing regime required for acceptance of the materials and the post-tensioning system according to this document. An international working group comprising more than 20 experts from administrative authorities, universities, laboratories, owners, structural designers, suppliers of prestressing steels and post-tensioning systems suppliers have actively contributed in order to develop these recommendations. This text has been written to cover best construction practices around the world, and to provide material specifications which are considered to be the most advanced available at the time of preparing this text. For ease of use (for Owner, Designer and Post-tensioning System Supplier), the content has been arranged systematically according to the system components into chapters focusing on performance characteristics, requirements and acceptance criteria.

Download or read book Materials for Architects and Builders written by Arthur Lyons and published by Routledge. This book was released on 2014-08-21 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for Architects and Builders provides a clear and concise introduction to the broad range of materials used within the construction industry and covers the essential details of their manufacture, key physical properties, specification and uses. Understanding the basics of materials is a crucial part of undergraduate and diploma construction or architecture-related courses, and this established textbook helps the reader to do just that with the help of colour photographs and clear diagrams throughout. This new edition has been completely revised and updated to include the latest developments in materials research, new images, appropriate technologies and relevant legislation. The ecological effects of building construction and lifetime use remain an important focus, and this new edition includes a wide range of energy saving building components.

Download or read book Admixtures for Concrete Mortar and Grout written by British Standards Institution and published by . This book was released on 2000 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Qualification for Cement Grouting for Prestressing Tendons in Containment Structures written by U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Admixtures for Concrete Mortar and Grout Admixtures for Grout for Prestressing Tendons Definitions Requirements Conformity Marking and Labelling written by British Standards Institute Staff and published by . This book was released on 2009-06-30 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete admixtures, Cement and concrete technology, Concretes, Mortars, Grouting, Prestressed concrete, Tendons, Composition, Quality control, Marking

Download or read book NRC Regulatory Guides written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1973 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of currently available electronic versions of NRC regulatory guides.

Download or read book Construction Materials Reference Book written by David Doran and published by Routledge. This book was released on 2013-07-24 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the definitive reference source for professionals involved in the conception, design and specification stages of a construction project. The theory and practical aspects of each material is covered, with an emphasis being placed on properties and appropriate use, enabling broader, deeper understanding of each material leading to greater confidence in their application. Containing fifty chapters written by subject specialists, Construction Materials Reference Book covers the wide range of materials that are encountered in the construction process, from traditional materials such as stone through masonry and steel to advanced plastics and composites. With increased significance being placed on broader environmental issues, issues of whole life cost and sustainability are covered, along with health and safety aspects of both use and installation.

Download or read book Pile Design and Construction Practice written by Michael Tomlinson and published by CRC Press. This book was released on 2014-10-08 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written to Eurocode 7 and the UK National AnnexUpdated to reflect the current usage of Eurocode 7, along with relevant parts of the British Standards, Pile Design and Construction Practice, Sixth Edition maintains the empirical correlations of the original-combining practical know how with scientific knowledge-and emphasizing relevant principles an