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Alkali Aggregate Reaction And Structural Damage To Concrete
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Book Synopsis Alkali-Aggregate Reaction and Structural Damage to Concrete by : Geoffrey E. Blight
Download or read book Alkali-Aggregate Reaction and Structural Damage to Concrete written by Geoffrey E. Blight and published by CRC Press. This book was released on 2011-01-18 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since AAR was first identified in 1940, it has been a subject dominated by studies of the mineralogy of AAR-susceptible aggregates, the chemistry of the AAR and related reactions and laboratory tests used to diagnose AAR and predict potential future swelling. Civil and structural engineers have found the literature bewildering and difficult to appl
Book Synopsis Alkali-Aggregate Reaction in Concrete by : Ian Sims
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.
Book Synopsis RILEM Recommendations for the Prevention of Damage by Alkali-Aggregate Reactions in New Concrete Structures by : Philip J. Nixon
Download or read book RILEM Recommendations for the Prevention of Damage by Alkali-Aggregate Reactions in New Concrete Structures written by Philip J. Nixon and published by Springer. This book was released on 2015-09-30 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the full set of RILEM Recommendations which have been produced to enable engineers, specifiers and testing houses to design and produce concrete which will not suffer damage arising from alkali reactions in the concrete. There are five recommended test methods for aggregates (designated AAR-1 to AAR-5), and an overall recommendation which describes how these should be used to enable a comprehensive aggregate assessment (AAR-0). Additionally, there are two Recommended International Specifications for concrete (AAR-7.1 & 7.2) and a Preliminary International Specification for dams and other hydro structures (AAR-7.3), which describe how the aggregate assessment can be combined with other measures in the design of the concrete to produce a concrete with a minimised risk of developing damage from alkali-aggregate reactions.
Download or read book Alkali Aggregate Reaction written by and published by . This book was released on 1996 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures by : Bruno Godart
Download or read book Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures written by Bruno Godart and published by Springer Science & Business Media. This book was released on 2013-04-08 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes procedures and methodologies used predominantly to obtain a diagnosis of damaged concrete possibly caused by Alkali-Aggregate Reaction (AAR). It has two primary objectives, namely firstly to identify the presence of AAR reaction, and whether or not the reaction is the primary or contributory cause of damage in the concrete; and secondly, to establish its intensity (severity) in various members of a structure. It includes aspects such as field inspection of the structure, sampling, petrographic examination of core samples, and supplementary tests and analyses on cores, such as mechanical tests and chemical analysis. Evaluation of test data for prognosis, consequences and appraisal will be more fully set out in AAR-6.2.
Book Synopsis Alkali-aggregate Reaction in Concrete Roads and Bridges by : Graham West
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.
Book Synopsis The Alkali-Silica Reaction in Concrete by : R N Swamy
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.
Book Synopsis Structural Effects of Alkali-silica Reaction by : Institution of Structural Engineers (Great Britain)
Download or read book Structural Effects of Alkali-silica Reaction written by Institution of Structural Engineers (Great Britain) and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Alkali-Aggregate Reaction in Concrete by : Marc-Andre Berube
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:
Book Synopsis Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete by : Leandro F. M. Sanchez
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:
Book Synopsis Diagnosis and Control of Alkali-aggregate Reactions in Concrete by : James A. Farny
Download or read book Diagnosis and Control of Alkali-aggregate Reactions in Concrete written by James A. Farny and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aggregates containing certain constituents can react with alkali hydroxides in concrete. The reactivity is potentially harmful only when it produces significant expansion. This alkali-aggregate reactivity (AAR) has two forms--alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR, sometimes called alkali-carbonate rock reaction, or ACRR). ASR is of more concern than ACR because the occurrence of aggregates containing reactive silica minerals is more common. Alkali-reactive carbonate aggregates have a specific composition that is not very common. Alkali-silica reactivity has been recognized as a potential source of distress in concrete since the later 1930s. Even though potentially reactive aggregates exist throughout North America, ASR distress in structural concrete is not common. There are a number of reasons for this: 1. Most aggregates are chemically stable in hydraulic-cement concrete 2. Aggregates with good service records are abundant in many areas 3. The concrete in service is dry enough to inhibit ASR 4. The use of certain pozzolans or slags controls ASR 5. In many concrete mixtures, the alkali content of the concrete is low enough to control harmful ASR 6. Some forms of ASR do not produce significant deleterious expansion To reduce ASR potential requires understanding the ASR mechanism; properly using tests to identify potentially reactive aggregates; and, if needed, taking steps to minimize the potential for expansion and related cracking. Alkali-carbonate reaction in concrete was not documented until 1957. Although ACR is much less common, this report also briefly reviews the mechanism, visual distress symptoms, identification tests, and control measures.
Book Synopsis Alkali-Aggregate Reaction by : K. Okada
Download or read book Alkali-Aggregate Reaction written by K. Okada and published by CRC Press. This book was released on 2004-01-14 with total page 923 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 8th International Conference on Alkali-Aggregate Reaction held in Kyoto, Japan, 17-20 July 1989.
Book Synopsis Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures by : Bruno Godart
Download or read book Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures written by Bruno Godart and published by Springer. This book was released on 2013-04-30 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes procedures and methods for obtaining a diagnosis of concrete damage caused by Alkali-Aggregate Reaction (AAR). Covers field inspection, sampling, petrographic examination of core samples and supplementary tests and analyses on cores.
Book Synopsis Internal Swelling Reactions in Concrete by : Leandro F. M. Sanchez
Download or read book Internal Swelling Reactions in Concrete written by Leandro F. M. Sanchez and published by CRC Press. This book was released on 2024-02-19 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: As critical concrete infrastructure deteriorates, engineers need efficient and reliable techniques to appraise the causes and the extent of deterioration, to evaluate the structural consequences and to select effective management protocols and rehabilitation strategies. This book looks at deterioration caused by internal swelling reaction (ISR) mechanisms in concrete, such as alkali-aggregate reaction, delayed ettringite formation and freeze-thaw cycles. The book provides accessible and comprehensive coverage of recent work and developments on the most common ISR mechanisms leading to induced expansion and deterioration. It addresses the implications of ISR on different scales (micro, meso and macro), outlines qualitative and quantitative techniques to assess the condition of affected concrete and introduces the multi-level assessment protocol, using advanced microscopic and mechanical techniques, particularly the stiffness damage test and damage rating index, as a reliable approach to appraise ISR-affected infrastructure. Also included is a detailed case study of the Robert-Bourassa Charest Overpass in Quebec. Internal Swelling Reactions in Concrete: Mechanisms and Condition Assessment is primarily intended for undergraduate and graduate students, as well as academics interested in the field of concrete durability and condition assessment of concrete. It will also be of interest to engineers and infrastructure owners dealing with ISR-related problems.
Book Synopsis Avoiding & Mitigating Alkali-Aggregate Reaction (AAR) in Concrete Structures by : Diego Jesus De Souza
Download or read book Avoiding & Mitigating Alkali-Aggregate Reaction (AAR) in Concrete Structures written by Diego Jesus De Souza and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali-Aggregate Reaction (AAR) is one of the most harmful distress mechanisms affecting the serviceability and durability of concrete critical infrastructure worldwide. Over the past decades, several approaches and recommendations have been developed to assess the potential reactivity of aggregates in the laboratory and the efficiency of preventive measures (e.g., supplementary cementing materials - SCMs) to mitigate ASR in the field. Yet, recent findings suggest that the appropriate use of SCMs "only" delayed and does not entirely prevent ASR occurrence. Moreover, once ASR starts in the field, there is no "universal" solution that should be applied in various cases, and each situation should be evaluated as "unique". Nevertheless, artificially triggering healing agents have been studied in the late years, thus presenting an interesting "physical" solution to reduce the ingress of water and recover damaged concrete elements, which could present an interesting solution for durability-related distress due to ASR. This Ph.D. project focuses on detailed laboratory investigations aiming first to understand the self-healing process of concrete (i.e., by the natural or engineered process). Then, its further influence on ASR-induced expansion and deterioration, either applied internally or externally to the concrete. To achieve this goal, concrete mixtures presenting a wide range of binder compositions, using distinct types of chemical admixtures (e.g., crystalline self-healing), and incorporating five different types/nature of highly reactive aggregates (i.e., coarse and fine) were combined to manufactured concrete specimens in the laboratory. Otherwise, in aging specimens, concrete samples were designed only with GU-cement as the binder material but incorporated two different types/nature of highly reactive aggregates. Then, the samples were exposed to ASR-induced development until they reached pre-determined expansion levels, in which a wide range of sealers and coating materials were applied on the surface of the affected specimens. Mechanical (i.e., stiffness damage test, modulus of elasticity, micro indentation, shear and compressive strengths) and microscopic (damage rating index and scanning electron microscopy) tests were performed on samples at different ages (up to two years of accelerated ASR development). The results show that besides changing AAR-kinetics, the different binder compositions or the chemical admixtures could modify the distress mechanism due to AAR. The addition of crystalline healing agents or their combination with SCMs in concrete not only delayed the development of inner damage but significantly lowered the compressive strength loss at equivalent expansion amplitudes than control specimens. Moreover, the combination of different binder materials modified the chemical and mechanical properties of the ASR-gel, changing its swelling properties and the further damage development in concrete. On the other hand, the wide range of surface treatments used were not able to alter ASR distress mechanism; yet, they changed ASR-kinetics. Moreover, their effectiveness to slower the reaction shows to be significantly influenced by the damage degree to which the surface treatment is applied. Finally, a comprehensive framework enabling the optimized selection of raw materials to prevent or mitigate ASR development is proposed.
Book Synopsis Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete by : Leandro F. M. Sanchez
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 701 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diagnosis & Prognosis of AAR Affected Structures by : Victor E. Saouma
Download or read book Diagnosis & Prognosis of AAR Affected Structures written by Victor E. Saouma and published by Springer Nature. This book was released on 2020-09-21 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the work of the RILEM Technical Committee 259-ISR. Addressing two complementary but fundamental issues: the kinetics of the reaction, and how this will affect the integrity of the structure (serviceability and strength), it also provides methodology for assessing past deterioration to enable readers to make engineering/science-based predictions concerning future expansion. The book is divided into six major topics: selection and interpretation of optimal monitoring system for structures undergoing expansion to monitor the progress of the swelling evolution and its consequences; development/refinement of current laboratory procedures to determine the kinetics of the reaction i.e. expansion vs (future) time, and to determine the kinetic characteristics of the time-dependent reaction to be used in a finite element simulation; extrapolation of results from structural component laboratory testing; selection of material properties based on data from existing structures affected by the alkali silica reaction or delayed ettringite formation; identification of critical features that should be present in a finite element code, development of test problems for validation, and a survey of relevant programs able to conduct a transient structural analysis of a structure undergoing chemically induced expansion; and lastly guidelines for finite element codes. The book is intended for practitioners responsible for concrete structures affected by the damaging alkali aggregate reaction, engineers dealing with aging structures, and researchers in the field.
