Download or read book Alkali aggregate Reaction in Concrete Roads and Bridges written by Graham West and published by Thomas Telford. This book was released on 1996 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a sound understanding of the alkali-aggregate reaction and how it affects the design, construction and maintenance of concrete roads and bridges. It draws on examples from the UK and around the world to relate experience of damage caused by this reaction and how the problems have been investigated and treated.
Download or read book Alkali aggregate Reaction written by Ahmad Shayan and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali-aggregate reaction (AAR) in concrete is potentially a deleterious reaction which can lead to premature deterioration of major structures such as concrete bridges and roads. Severe cracking of the affected structure exposes the interior of the concrete to aggressive agents, leading to further deterioration. Once the structure is built with reactive ingredients, an ongoing expansive reaction takes place which causes continual cracking of the structure and widening of the existing cracks. The decision to repair such structures should be made carefully, based on the residual expansion of the concrete, the environment of the affected structure, the overall condition of the structure and its safety, and cost-effectiveness of the repair. These considerations should form a part of the management strategy of the bridge network. Measures to prevent AAR damage to concrete roads and bridge structure will also be outlined.
Download or read book Handbook for the Identification of Alkali silica Reactivity in Highway Structures written by David Stark and published by . This book was released on 1991 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is designed to help highway engineers and bridge inspectors spot and fix this very damaging and difficult-to-detect problem, namely, alkali-silica reactivity (ASR). The 49-page handbook provides for the field identification of ASR in portland cement concrete structures, such as highway pavements and bridges. ASR occurs when silica or silicates in aggregates react with alkali in the cement to form a gel-like substance which absorbs water and eventually cracks the concrete. Some areas of the country are more susceptible to this than others. Accurate detection of ASR is the key to choosing the best rehabilitation strategy. The proper diagnosis and assessment of the problem is covered.
Download or read book Concrete in Pavements and Structures written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1999 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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 1044 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.
Download or read book The Alkali aggregate Reaction in Concrete written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1958 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers a discussion of the problem of deterioration of certain concretes caused by an expansive reaction between the alkalies in the cement and certain constituents of the aggregate. Presented in 3 parts. One dealing with field experiences. A second with the laboratory tests and a third with theoretical considerations and present research.
Download or read book Reactive Aggregate in Concrete Structures written by Reza Akhavan and published by . This book was released on 1989 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colorado frequently experiences pavement deterioration due to reactive aggregates. This study examined whether alkali-silica reactivity was also causing damage to bridge structures. A number of bridges were inspected and samples were extracted from five and subjected to a petrographer's analysis. Three of the five samples showed conclusive evidence of alkali-silica reactivity. Evidence was not conclusive in two other samples (A).
Download or read book Applied Engineering Materials And Mechanics Proceedings Of The 2016 International Conference Icaemm 2016 written by Jong Wan Hu and published by World Scientific. This book was released on 2016-07-14 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: ICAEMM2016 is an annual international conference that aims to present research outcomes undertaken in applied engineering, materials and mechanics. The book is a collection of 48 selected peer-reviewed articles, organized into three main chapters — advanced materials and power energy theory and studies; management technology and construction engineering applications; and mechanical and hydrology engineering design and applications.This conference brings together scientists, scholars, engineers and students from universities, research institutes and industries all over the world to share their latest research results. The conference also fosters collaboration among organizations and researchers alike in the areas of applied mechanics and materials science.
Download or read book Maintenance Safety Risk Management and Life Cycle Performance of Bridges written by Nigel Powers and published by CRC Press. This book was released on 2018-07-04 with total page 5447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges contains lectures and papers presented at the Ninth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018), held in Melbourne, Australia, 9-13 July 2018. This volume consists of a book of extended abstracts and a USB card containing the full papers of 393 contributions presented at IABMAS 2018, including the T.Y. Lin Lecture, 10 Keynote Lectures, and 382 technical papers from 40 countries. The contributions presented at IABMAS 2018 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of bridge maintenance, safety, risk, management and life-cycle performance. Major topics include: new design methods, bridge codes, heavy vehicle and load models, bridge management systems, prediction of future traffic models, service life prediction, residual service life, sustainability and life-cycle assessments, maintenance strategies, bridge diagnostics, health monitoring, non-destructive testing, field testing, safety and serviceability, assessment and evaluation, damage identification, deterioration modelling, repair and retrofitting strategies, bridge reliability, fatigue and corrosion, extreme loads, advanced experimental simulations, and advanced computer simulations, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of more rational decision-making on bridge maintenance, safety, risk, management and life-cycle performance of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including students, researchers and engineers from all areas of bridge engineering.
Download or read book The Alkali Silica Reaction in Concrete written by R N Swamy and published by CRC Press. This book was released on 1991-09-01 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the fundamental causes and spectrum effects of ASR. It considers he advances that have been made in our understanding of this problem throughout the world.
Download or read book Concrete Petrography written by Alan Poole and published by CRC Press. This book was released on 2016-12-19 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic reference has established the value of petrography as a powerful method for the investigation of concrete as a material. It provides an authoritative and well-illustrated review of concrete composition and textures, including the causes of defects, deterioration, and failure that can be identified using a petrological microscope. This new edition is entirely revised and updated and also greatly extended to take account of new scientific developments and significant improvements in instrumentation and to reflect current laboratory working practices, as well as to reflect new understanding of the performance of concrete and related materials. Now in full color throughout, Concrete Petrography, Second Edition provides case study examples, with appropriate explanatory discussions and practical advice on selecting, handling and preparing specimens. It assists and guides the engineer, the trainee and the experienced petrographer in understanding the scientific evidence that is basic to petrographic analysis and so will lead to more accurate and timely diagnosis and treatment of problems in structural concrete. This book includes: Contributions in specialist areas by internationally recognized experts Explanation of computer techniques as an aid to petrography Full coverage of inspection, sampling, and specimen preparation New sections covering recent technological development of equipment Guidance on observation of cement and concrete mineralogy and microfabrics Discussion and illustrative examples of deterioration and failure mechanisms New work and guidance on the determination of water/cement ratio New color illustrations and micrographs throughout Thorough updating of standards, other authoritative publications, and references A fully revised, extended, and updated glossary of optical and other properties
Download or read book Alkali Aggregate Reaction in Concrete written by Marc-Andre Berube and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Evaluation of Alkali carbonate and Alkali silica Reactivity in Concrete Pavement from South Dakota written by Edward F. Duke and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study to evaluate the extent of alkali-silica (ASR) and alkali-carbonate (ACR) reactions in pavement ans structural concrete from selected sites in South Dakota, and to assess the role of these reactions in premature deterioration of the concrete. The main focus of the report is a petrographic examination of samples from the Platte-Winner Bridge. It was determined that ACR is widespread in concrete cores from failed pier caps 16-17 of the bridge. ACR is known to contribute to premature deterioration of concrete containing dolomite (CaMg[CO3]2) as aggregate, although the exact mechanisms leading to deterioration are not fully understood. Examination of the concrete cores using optical microscopy and scanning electron microscopy indicates two mechanisms by which ACR may have contributed to deterioration of this structure: 1) Secondary porosity is observed within aggregate particles where dolomite is converted to calcite and brucite. 2) Microfractures observed in aggregate appear to have originated near the aggregate rim and propagated outward into the paste. Both effects could be explained by small, local volume contraction associated with ACR. Once secondary porosity and permeability are established on a microscopic scale, deterioration by freezing and thawing or other mechanisms may accelerate the process of concrete deterioration. It was also determined that the bridge samples contained unacceptably low levels of entrained air, and this was likely a major factor leading to failure. The results of the study of the Platte-Winner Bridge, in conjunction with results from concrete pavement samples from eastern South Dakota, indicate that dolomite should be considered a highly deleterious component of both coarse and fine sand aggregate sources, and that its application should be minimized.
Download or read book Research Reports written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1958 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Repair Protection and Waterproofing of Concrete Structures written by Teresa C. Piliouras and published by CRC Press. This book was released on 1997-07-17 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wealth of recent research into the continued deterioration of reinforced concrete structures has led to a review of methods of investigation and repair techniques. This thoroughly revised and updated new edition brings together the fundamental aspects of this world wide problem and offers advice on how investigations, diagnosis and consequent rem
