Download or read book Effects of Alkali silica Reaction on Concrete Foundations written by P. L. Walton and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali-silica reaction (ASR) is known to cause harmful changes in concrete. This paper describes its effects on concrete foundations, and gives examples of the structural problems caused by ASR. It will be of interest to architects, structural engineers, civil engineers and building specifiers.

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 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 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:

Download or read book Alkali Aggregate Reaction in Concrete written by Alan B. Poole and published by CRC Press. This book was released on 2016-01-15 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book 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. Although there are a number of text books offering readers short sections that deal with this particular type of deterioration and damage to concrete, no single book other than this gathers together the consensus 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 the methods of treatment of this problem where it develops in concrete. It provides accurate information on the most recent research results concerning AAR as it affects concrete structures and covers the practical approaches of dealing with the problem. It is illustrated by numerous actual case study examples taken from many parts of the world. The book has been compiled from the expert contributions provided by senior engineers and scientists from many parts of the world. It 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 of the book is divided into nine chapters covering each region of the world in turn. They have been written by experts with specialist knowledge of AAR in the particular region and give a state of the art and authoritative appraisal of the problem and its solution as it affects concrete structures in every country within each of these regions. The authoritative compilation of information on this topic has not been attempted previously on this scale and is therefore a reference source essential to professional civil engineers, consultant engineers, aggregate producers, designers, cement and concrete producers. It also forms an authoritative source reference book where technical and legal issues of dispute arise anywhere in the world. In 1992 a first edition entitled Alkali-Silica Reaction in Concrete was published in a first attempt to cover this concrete problem with a global perspective, but the coverage was incomplete. This new completely rewritten edition offers a fully complete and universal coverage of the global situation concerning AAR and includes a wealth of new evidence and research information that has accumulated in the intervening years.

Download or read book Effects of Alkali Silica Reaction on Response of Concrete Squat Shear Walls written by Farhad Habibi and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali-Aggregate Reaction (AAR) problem is common in structures such as bridges, roadways, airport runways, and nuclear power plants that were built with reactive aggregate. The Alkali-Aggregate Reaction progresses with time in concrete between the alkaline cement paste and reactive amorphous silica. The reaction uses the moisture in the atmosphere and produces a gel that keeps dilating. The dilating gel causes cracks in the concrete mass thus possibly compromising the integrity of concrete. This can cause a number of issues with regard to the performance of the concrete structures caused by deteriorating concrete properties such as lowering of tensile strength, stiffness, ductility and deterioration of bond characteristics. Results from testing two squat shear walls made with normal concrete and four walls with concrete containing reactive aggregate causing alkali-silica reaction (ASR) are presented. In addition to the squat shear walls, several companion specimens were cast to evaluate the concrete material properties and perform non-destructive tests. These specimens included 21 cylinders, six modulus of rupture (MOR) beams, three expansion prisms, and six dog-bone specimens. To accel¬erate the ASR and deterioration of the concrete, the walls were stored in an environmental chamber, specially constructed with the capacity to store large specimens in a controlled high-temperature and high-humidity condition. These walls were tested in three stages under reversed cyclic lateral loads while at the same time subjected to constant axial load simulating earthquake loads. Small companion specimens revealed that ASR caused free expan¬sion of approximately 0.23%. While concrete gained compressive strength over time, its tensile strength and stiffness deteriorated significantly due to the ASR. The lateral load carrying capacity of the walls was not adversely affected. The performance of the walls, however, deteriorated significantly over time with respect to ductility and energy dissipation capacity. The absorbed strain energy capacity of the ASR shear wall at full exhaustion was approximately 25% of that of the regular concrete wall and the displacement ductility was reduced by approximately 30% due to ASR. Finally, finite element analysis technique was used to model this behaviour which gave reasonably good estimates of the experimental shear wall responses.

Download or read book Alkali silica Reaction in Concrete written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book International Congress on Polymers in Concrete ICPIC 2018 written by Mahmoud M. Reda Taha and published by Springer. This book was released on 2018-04-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects the proceedings from the International Congress of Polymers in Concrete 2018 (ICPIC), held under the theme “Polymers for Resilient and Sustainable Concrete Infrastructure.” ICPIC 2018 provides an opportunity for researchers and specialists working in the fields of polymers to exchange ideas and follow the latest progress in the use of polymers in concrete infrastructure. It also showcases the use of polymers and polymer concrete in sustainable and resilient development, and provides a platform for local and overseas suppliers, developers, manufacturers and contractors using polymers, polymer concrete and polymer composites in concrete structures to develop new business opportunities and follow the latest developments in the field. The International Congress of Polymers in Concrete is an international forum that has taken place every three years for the last 40 years with the objective of following progress in the field of polymers and their use in concrete and construction. Following 15 successful congresses held in London (1975), Austin (1978), Koriyama (1981), Darmstadt (1984), Brighton (1987), Shanghai (1990), Moscow (1992), Oostende (1995), Bologna (1998), Honolulu (2001), Berlin (2004), Chuncheon (2007), Funchal (2010), Shanghai (2013) and Singapore (2015), the 16th ICPIC will take place in Washington, DC, from April 29 to May 1st, 2018.

Download or read book The Effects of Alkali silica Reaction in Reinforced Concrete written by and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alkali Activated Cements and Concretes written by Caijun Shi and published by CRC Press. This book was released on 2006-05-10 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first English-language book which reviews and summarizes worldwide research advances in alkali-activated cements and concrete. Essential topics include: raw materials and their properties for the production of the two new types of binder the hydration and microstructure development of alkali-activated slag cements the mechanical properties and durability of alkali-activated slag cement and concrete other various cementing systems and their applications related standards and specifications. This respected team of authors has produced an important piece of research that will be of great interest to professionals and academics alike, enabling the production of more durable and environmentally sensitive materials.

Download or read book Compressive Strength of Concrete written by Pavel Krivenko and published by BoD – Books on Demand. This book was released on 2020-03-11 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete made using mineral cements, the raw materials which on earth are practically endless, is known as one of the oldest building materials and during the last decades of the twentieth century has become a dominant building material for general use. At the same time, the requirements of the quality of concrete and its performance properties, in particular compressive strength, durability, economical efficiency, and low negative impact of its manufacture on the environment have not yet been completely met. Bearing these requirements in mind, researchers and engineers worldwide are working on how to satisfy these requirements. This book has been written by researchers and experts in the field and provides the state of the art on recent progress achieved on the properties of concrete, including concrete in which industrial by-products are utilized. The book is dedicated to graduate students, researchers, and practicing engineers in related fields.

Download or read book Mechanical Effects of Alkali Silica Reaction in Concrete Studied by SEM image Analysis written by Moshen Ben Haha and published by . This book was released on 2006 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cement and Concrete Chemistry written by Wieslaw Kurdowski and published by Springer Science & Business. This book was released on 2014-04-24 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph describes cement clinker formation. It covers multicomponent systems, clinker phase structures and their reactions with water, hydrate composition and structure, as well as their physical properties. The mineral additions to cement are described as are their influence on cement-paste properties. Special cements are also discussed. The microstructure of concrete is then presented, and special emphasis is given to the role of the interfacial transition zone, and the corrosion processes in the light of cement-phase composition, mineral additions and w/c ratio. The admixtures' role in modern concrete technology is described with an emphasis on superplasticizer chemistry and its cement-paste rheological modification mechanism. Cement with atypical properties, such as calcium aluminate, white, low energy and expansive cements are characterized. The last part of the book is devoted to special types of concrete such as self compacting and to reactive powders.

Download or read book Methods for Controlling Effects of Alkali silica Reaction in Concrete written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The structural effects of alkali silica reaction ASR written by and published by . This book was released on 1990 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Alkali Activated Cements Mortars and Concretes written by F. Pacheco-Torgal and published by Elsevier. This book was released on 2014-11-20 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an updated state-of-the-art review on new developments in alkali-activation. The main binder of concrete, Portland cement, represents almost 80% of the total CO2 emissions of concrete which are about 6 to 7% of the Planet's total CO2 emissions. This is particularly serious in the current context of climate change and it could get even worse because the demand for Portland cement is expected to increase by almost 200% by 2050 from 2010 levels, reaching 6000 million tons/year. Alkali-activated binders represent an alternative to Portland cement having higher durability and a lower CO2 footprint. - Reviews the chemistry, mix design, manufacture and properties of alkali-activated cement-based concrete binders - Considers performance in adverse environmental conditions. - Offers equal emphasis on the science behind the technology and its use in civil engineering.