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Author : Jose F. Muñoz
Publisher :
ISBN 13 :
Total Pages : 233 pages
Book Rating : 4.:/5 (694 download)
Download or read book Effect of Microfines Associated with Aggregates on Concrete Performance and Microstructure written by Jose F. Muñoz and published by . This book was released on 2010 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (891 download)
Download or read book Detecting Deleterious Fine Particles in Concrete Aggregates and Defining Their Impact written by and published by . This book was released on 2010 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.:/5 (85 download)
Download or read book Effects of Aggregate Microfines and Potassium Acetate Interactions on Concrete Performance written by and published by . This book was released on 2012 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this research is to elucidate the role that microfines from coarse and fine aggregates play in the development of the Alkali Silica Reaction (ASR) related distress observed in airport pavements subject to anti-icing agents. As a secondary objective, it was proposed to identify other potential impacts of microfines and deicers on concrete durability. It was determined that combinations of microfines at less than 5% of the total aggregate weight and potassium acetate deicer (KAC Deicer) exposure caused significant deterioration of concrete that may be mistaken for ASR cracking and expansion. However, our analyses suggest it was not ASR, at least as traditionally diagnosed through the presence of ASR gel and reaction rims around aggregates. Expansions in modified ASTM C1293 produced expansions from 0.05% to 0.70% at one year depending on the type of microfine. Expansions of specimens containing microfines but not exposed to KAc Deicer produced negligible expansion. Expansions were larger with base aggregate known to be prone to ASR, but significant expansions (up to 0.50% at one year) also occurred in specimens with unreactive aggregates. Degradation combined with the reduction in entrained air content led to dramatic loss of freeze-thaw durability. These degradations were associated with specific mineralogical profiles of microfines in the presence of KAc Deicer and these profiles consistently were associated with corresponding levels of degradation. The KAc Deicer transformed in the concrete pore solutions to form potassium sulfate and calcium-bearing potassium sulfate compounds. During the transformation of the potassium acetate the level of hydroxide increases dramatically in the pore solution and can lead to reformation of silica species released by the microfines and the aggregates. While these reactions do not appear to be the classical alkali silica reaction, they may exhibit some similarity and create an environment where expansion internally within concrete leads to deterioration.
Author : Karl Gullerud
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (1 download)
Download or read book Effects of Aggregate Coatings and Films on Concrete Performance written by Karl Gullerud and published by . This book was released on 2003 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. M. Roy
Publisher : Strategic Highway Research Program (Shrp)
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (1 download)
Download or read book Concrete Microstructure written by D. M. Roy and published by Strategic Highway Research Program (Shrp). This book was released on 1993 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durability of concrete in highway systems is a problem of national concern. In order to better understand the mechanisms which intrinsically control durability in highway concrete, it is necessary to define and understand those factors which impact concrete microstructure which is a consequence of both its formulation and the processes taking place during mixing, placing and curing. This report documents an investigation of those variables which control cement hydration and consequent microstructural development.
Author :
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (1 download)
Download or read book Expanded Study on the Effects of Aggregate Coating and Films on Concrete Performance written by and published by . This book was released on 2007 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (431 download)
Download or read book Cena de Nochebuena written by and published by . This book was released on with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : JE. Gillott
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (125 download)
Download or read book Effect of Microstructure and Composition of Limestone, Marble, Basalt, and Quartzite Aggregate on Concrete Durability in Presence of Solutions of Calcium Chloride and Magnesium Sulfate written by JE. Gillott and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aggregate long has been known to affect concrete durability. Unsound aggregate has been held responsible for pitting, popouts, spalling, map-cracking, D-cracking, bond-failure, and scaling. Sulfate and chloride solutions are a cause of concrete deterioration, Sulfates are common in groundwater and chlorides are commonly used as deicing agents; these ions are also present in seawater. Attack on aggregate and portland cement paste has been attributed to both physical and chemical processes. The scanning electron microscope has been used to examine rocks that have been immersed in sulfate and chloride solutions. Re-examination of the same areas after increasing times gives an indication of the resistance of the rocks to attack. The significance of the observations to the durability of concrete is discussed.
Author : Konstantin Kovler
Publisher : Springer Nature
ISBN 13 : 3030433323
Total Pages : 192 pages
Book Rating : 4.0/5 (34 download)
Download or read book Concrete Durability and Service Life Planning written by Konstantin Kovler and published by Springer Nature. This book was released on 2020-04-28 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the proceedings of the 3rd International RILEM Workshop on Concrete Durability and Service Life Planning (ConcreteLife’20), held in Haifa, Israel in January 2020. The papers cover a range of topics in concrete curing, cracking in concrete structures, corrosion of steel in concrete, thermal and hygral effects, concrete in cold climates and under high temperatures, recycling, alkali-silica reactions, chloride and sulfate attacks, marine structures, transport phenomena, durability design, microstructure of concrete and volume changes, and life cycle assessment. The book also explores future trends in research, development, and practical engineering applications related to durable concrete construction, and focuses on the design and construction of concrete structures exposed to various environmental conditions and mechanical loading. Given its scope, it offers a valuable asset for all researchers and graduate students in the areas of cement chemistry, cement production, and concrete design.
Download or read book Microfiller Effect on Rheology, Microstructure, and Mechanical Properties of High-performance Concrete written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Moncef Nehdi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Microfiller Effect on Rheology, Microstructure, and Mechanical Properties of High-performance Concrete written by Moncef Nehdi and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dale P. Bentz
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (1 download)
Download or read book Influence of Aggregate Characteristics on Concrete Performance written by Dale P. Bentz and published by . This book was released on 2017 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: While the influence of paste properties on concrete performance has been extensively studied and in many cases reduced to quantitative relationships, that between aggregate characteristics and concrete performance has not been investigated in detail. Based on previous research that demonstrated significant strength differences for two similar concrete mixtures, one prepared with limestone aggregates and the other with siliceous gravel, a joint study between the National Institute of Standards and Technology and the Federal Highway Administration was initiated to explore in detail the influence of aggregate characteristics on concrete performance. Eleven aggregates of differing mineralogy were identified and obtained both for bulk characterization and for incorporation into two concrete mixtures. The first concrete mixture was based on a 100 % ordinary Type I/II portland cement (OPC), while the second consisted of a ternary 60:30:10 volumetric blend of this cement with 30 % of a Class C fly ash and 10 % of a fine limestone powder. This latter sustainable mixture had exhibited exemplary performance in a previous study. Aggregates were characterized with respect to mechanical and thermomechanical properties, geometrical characteristics, and surface energies. For the prepared concretes, mechanical, thermomechanical, and electrical properties were measured at ages to 91 d and microstructural examinations were conducted to examine the interfaces between aggregates and cement paste. Concrete performance varied widely amongst the different aggregates, with the range/average value for 28-d compressive strength being 32?% for the OPC concretes and 37 % for those based on the ternary blend binder. With the exceptions of relating concrete modulus to aggregate modulus and concrete coefficient of thermal expansion (CTE) to aggregate CTE, weak correlations were generally obtained between a single aggregate characteristic and concrete performance properties.
Author :
Publisher :
ISBN 13 :
Total Pages : 470 pages
Book Rating : 4.:/5 (318 download)
Download or read book ACI Materials Journal written by and published by . This book was released on 2008 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J.C. Maso
Publisher : CRC Press
ISBN 13 : 0203627253
Total Pages : 218 pages
Book Rating : 4.2/5 (36 download)
Download or read book Interfacial Transition Zone in Concrete written by J.C. Maso and published by CRC Press. This book was released on 2004-03-01 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important new state-of-the-art report prepared by RILEM Technical Committee 108 ICC. It has been written by a team of leading international experts from the UK, USA, Canada, Israel, Germany, Denmark, South Africa, Italy and France. Research studies over recent years in the field of cement science have focused on the behaviour of the interfaces between the components of cement-based materials. The techniques used in other areas of materials science are being applied to the complex materials found in cements and concretes, and this book provides a significant survey of the present state of the art.
Author : P. Barnes
Publisher : CRC Press
ISBN 13 : 0203477782
Total Pages : 584 pages
Book Rating : 4.2/5 (34 download)
Download or read book Structure and Performance of Cements, Second Edition written by P. Barnes and published by CRC Press. This book was released on 2002-11-01 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing together a multinational team of authors, this second edition of Structure and Performance of Cements highlights the latest global advances in the field of cement technology. Three broad categories are covered: basic materials and methods, cement extenders, and techniques of examination. Within these categories consideration has been given to environmental issues such as the use of waste materials in cement-burning as supplementary fuels and new and improved methods of instrumentation for examining structural aspects and performance of cements. This book also covers cement production, mineralogy and hydration, as well as the mechanical properties of cement, and the corrosion and durability of cementitious systems. Special cements are included, along with calcium aluminate and blended cements together with a consideration of the role of gypsum in cements. Structure and Performance of Cements is an invaluable key reference for academics, researchers and practitioners alike.
Author :
Publisher :
ISBN 13 :
Total Pages : 972 pages
Book Rating : 4.3/5 (91 download)
Download or read book Ceramic Abstracts written by and published by . This book was released on 1994 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Francesco Silvestri
Publisher : CRC Press
ISBN 13 : 0429632010
Total Pages : 8083 pages
Book Rating : 4.4/5 (296 download)
Download or read book Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions written by Francesco Silvestri and published by CRC Press. This book was released on 2019-07-19 with total page 8083 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions contains invited, keynote and theme lectures and regular papers presented at the 7th International Conference on Earthquake Geotechnical Engineering (Rome, Italy, 17-20 June 2019. The contributions deal with recent developments and advancements as well as case histories, field monitoring, experimental characterization, physical and analytical modelling, and applications related to the variety of environmental phenomena induced by earthquakes in soils and their effects on engineered systems interacting with them. The book is divided in the sections below: Invited papers Keynote papers Theme lectures Special Session on Large Scale Testing Special Session on Liquefact Projects Special Session on Lessons learned from recent earthquakes Special Session on the Central Italy earthquake Regular papers Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions provides a significant up-to-date collection of recent experiences and developments, and aims at engineers, geologists and seismologists, consultants, public and private contractors, local national and international authorities, and to all those involved in research and practice related to Earthquake Geotechnical Engineering.
