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Air Void Clustering In Concrete
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Book Synopsis Field Study of Air Content Stability in the Slipform Paving Process by :
Download or read book Field Study of Air Content Stability in the Slipform Paving Process written by and published by . This book was released on 2012 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the impacts of construction on the air content and air-void system structure of Portland cement concrete pavements. The primary intent was to quantify the air content of fresh concrete before and after it has gone through the slipform paver. The air-void system parameters of hardened concrete were then assessed using cast and extracted core specimens. The results of the air content testing on fresh concrete and the concrete cylinder specimens cast in the field suggested that there is some loss of air as the concrete passes through the paver. Laboratory testing performed on cores extracted from the pavement did not provide any conclusive evidence that entrained air is lost during the slipform paving process. In fact, many of the extracted cores had measured air content values that were much higher than the specification requirement. If excessive, this could result in increased permeability and low-strength related issues. Although a rigorous statistical analysis was not performed, the results suggest that the air content testing on fresh concrete is not capturing the true air content of the concrete placed with a slipform paver. The fresh concrete air content is generally lower than the air content measured in the cores.
Book Synopsis High-Strength Concrete by : Michael A. Caldarone
Download or read book High-Strength Concrete written by Michael A. Caldarone and published by CRC Press. This book was released on 2014-04-21 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical book from a highly experienced author presents clearly the means and methods for designing, producing and using high-strength concrete. High-strength concrete offers many benefits. Higher compressive strengths allow for a reduction in the cross-sectional dimensions of columns and walls in buildings. Its greater stiffness allows for increasing building heights while controlling sway and occupant comfort. Civil structures such as bridges have benefited from greater span lengths, shallower beam sections, wider girder spacing, and extended service life. Illustrated with real life examples, through documented case histories, High-Strength Concrete will be a valuable resource for contractors, producers, inspection agencies, as well as engineers and researchers.
Book Synopsis Concrete Petrography by : Alan Poole
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
Book Synopsis Advanced Asphalt Materials and Paving Technologies by : Zhanping You
Download or read book Advanced Asphalt Materials and Paving Technologies written by Zhanping You and published by MDPI. This book was released on 2018-05-04 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Advanced Asphalt Materials and Paving Technologies" that was published in Applied Sciences
Book Synopsis Identifying Incompatible Combinations of Concrete Materials by : Peter C. Taylor
Download or read book Identifying Incompatible Combinations of Concrete Materials written by Peter C. Taylor and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unexpected interactions between otherwise acceptable ingredients in portland cement concrete are becoming increasingly common as cementitious systems become more and more complex and demands on the systems are more rigorous. Such incompatibilities are exhibited as early stiffening or excessive retardation, potential for uncontrolled early-age cracking, and unstable or unacceptable air-void systems. A number of test methods have been reviewed to assess their usefulness in detecting incompatibility early to help prevent problems with pavements in the field. A protocol has been developed to allow product manufacturers, concrete producers, contractors, and owners to monitor their materials and concrete systems. The protocol is phased to allow relatively simple field ttests to provide early warnings of potential problems and tthen central laboratory tests to support and confirm the field work. This is the first of two volumes. The other volume in the series is: FHWA HRT-06-080, Identifying incompatible combinations of concrete materials, volume II--Test protocol.
Book Synopsis Evaluating Air-entraining Admixtures for Highway Concrete by : Mohamad Nagi
Download or read book Evaluating Air-entraining Admixtures for Highway Concrete written by Mohamad Nagi and published by Transportation Research Board. This book was released on 2007 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents a recommended procedure for evaluating air-entraining admixtures used in highway concrete. The procedure involves the testing of non-air-entrained concrete and concrete containing the air-entraining admixture under simulated field conditions. Criteria are proposed for acceptance of admixtures for use in either highway pavements or structures. The recommended procedure and acceptance criteria will guide materials engineers in evaluating and selecting air-entraining admixtures that should contribute to appropriate freeze-thaw durability and thus to good performance and long service life. The content of the report will be of immediate interest to materials engineers, researchers, and others concerned with the design of concrete mixtures for use in highway pavements and structures."--taken from Foreword, page [v].
Book Synopsis An Introduction to Concrete Admixtures for Pavement by : J. Paul Guyer, P.E., R.A.
Download or read book An Introduction to Concrete Admixtures for Pavement written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2019-08-12 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers and construction managers interested in admixtures for portland cement concrete pavement. Here is what is discussed: 1. INTRODUCTION 2. AIR ENTRAINING ADMIXTURES 3. WATER-REDUCING ADMIXTURES 4. SET-RETARDING ADMIXTURES 5. SET-ACCELERATING ADMIXTURES 6. OTHER ADMIXTURES 7. SUMMARY.
Book Synopsis Managing Mining and Minerals Processing Wastes by : Chongchong Qi
Download or read book Managing Mining and Minerals Processing Wastes written by Chongchong Qi and published by Elsevier. This book was released on 2023-03-10 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Managing Mining and Minerals Processing Wastes: Concepts, Design and Applications presents fundamental knowledge in waste management in mining and minerals processing and summarizes recent advances. The book offers readers insights into innovative ways to manage waste in the mining and minerals industry. Sections cover a brief introduction to this topic and an explanation of waste generation, and how to manage the six types of waste, including waste rock, mill tailings, coal refuse and coal fly ash, quarry waste, metallurgical slugs and washery rejects. The title then emphasizes the management of hazardous waste, the acid mine drainage and the lifecycle assessment of waste management. Finally, the book considers current and emerging challenges. This publication offers a comprehensive background to waste management in mining and minerals processing and a summary of recent advances and innovative strategies for managing each kind of waste. - Presents the background to waste management in minerals and mining, also summarizing recent advances - Provides an accessible introduction to the current state of, and future prospects for, waste management - Helps readers increase their usable knowledge on waste management in mining and minerals engineering - Offers new insights into how waste can be managed in innovative ways - Covers hazardous waste, acid mine drainage, lifecycle assessment and emerging issues
Book Synopsis Freeze-thaw Resistance of Concrete with Marginal Air Content by : Jussara Tanesi
Download or read book Freeze-thaw Resistance of Concrete with Marginal Air Content written by Jussara Tanesi and published by . This book was released on 2006 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freeze-thaw resistance is a key durability factor for concrete pavements. Recommendations for the air void system parameters are normally: 6 ± 1 percent total air, and spacing factor less than 0.20 millimeters. However, it was observed that some concretes that did not possess these commonly accepted thresholds presented good freeze-thaw resistance in laboratory studies. This study evaluated the freeze-thaw resistance of several "marginal" air void mixes, with two different types of air-entraining admixtures (AEA)-a Vinsol resin and a synthetic admixture. This study used rapid cycles of freezing and thawing in plain water, in the absence of deicing salts. For the specific materials and concrete mixture proportions used in this project, the marginal air mixes (concretes with fresh air contents of 3.5 percent or higher) presented an adequate freeze-thaw performance when Vinsol resin based air-entraining admixture was used. The synthetic admixture used in this study did not show the same good performance as the Vinsol resin admixture
Download or read book Concrete International written by and published by . This book was released on 2007 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Introduction to Pavement Engineering, Volume 1 by : J. Paul Guyer, P.E., R.A.
Download or read book An Introduction to Pavement Engineering, Volume 1 written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2019-09-26 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers, construction managers and highway maintenance managers interested in pavement engineering. This is one of two volumes. This is what is contained in this volume: 1. AGGREGATE SURFACE PAVEMENTS 2. THIN ASPHALT PAVEMENT OVERLAYS 3. CONCRETE ADMIXTURES FOR PAVEMENT 4. ACOUSTIC SPECTROSCOPY FOR ASR TESTING OF CONCRETE PAVEMENT 5. BASES AND SUBBASES FOR CONCRETE PAVEMENT 6. INTERNAL CURING OF CONCRETE PAVEMENT 7. PAVEMENT FOR SEASONAL FROST CONDITIONS 8. PAVEMENT DRAINAGE 9. FLEXIBLE ASPHALT CONCRETE 10. ELASTIC LAYERED METHODS OF FLEXIBLE PAVEMENT DESIGN 11. COMPACTION AND QUALITY CONTROL FOR HOT MIX ASPHALT PAVEMENT 12. SURFACE PREPARATION AND PLACEMENT FOR HOT MIX ASPHALT PAVEMENT 13. PAVEMENT SURVEY, MAINTENANCE AND REPAIR 14. PAVEMENT OVERLAYS.
Download or read book ACI Materials Journal written by and published by . This book was released on 2008 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seventh International Symposium on Utilization of High Strength/ High Performance Concrete by : H. G. Russell
Download or read book Seventh International Symposium on Utilization of High Strength/ High Performance Concrete written by H. G. Russell and published by . This book was released on 2005 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9 by : Christiane Raab
Download or read book Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9 written by Christiane Raab and published by Springer Nature. This book was released on 2020-06-19 with total page 955 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of an international conference held at Empa (Swiss Federal Laboratories for materials Science and Technology) in Dübendorf, Switzerland, in July 2020. The conference series was established by the International Society of Maintenance and Rehabilitation of Transport Infrastructure (iSMARTi) for promoting and discussing state-of-the-art design, maintenance, rehabilitation and management of pavements. The inaugural conference was held at Mackenzie Presbyterian University in Sao Paulo, Brazil, in 2000. The series has steadily grown over the past 20 years, with installments hosted in various countries all over the world. The respective contributions share the latest insights from research and practice in the maintenance and rehabilitation of pavements, and discuss advanced materials, technologies and solutions for achieving an even more sustainable and environmentally friendly infrastructure.
Book Synopsis Manual on Control of Air Content in Concrete by : David Whiting
Download or read book Manual on Control of Air Content in Concrete written by David Whiting and published by . This book was released on 1998 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Concrete in Cold Climates by : M. Pigeon
Download or read book Durability of Concrete in Cold Climates written by M. Pigeon and published by CRC Press. This book was released on 2014-04-21 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and authoritative review of durability of the frost resistance of concrete. It will enable both concrete materials specialists and practising engineers to better understand the deterioration processes which take place during freezing and thawing, and the effects of de-icing salts on concrete. It shows how test pro
Author :Gustavo J. Parra-Montesinos Publisher :Springer Science & Business Media ISBN 13 :9400724365 Total Pages :567 pages Book Rating :4.4/5 (7 download)
Book Synopsis High Performance Fiber Reinforced Cement Composites 6 by : Gustavo J. Parra-Montesinos
Download or read book High Performance Fiber Reinforced Cement Composites 6 written by Gustavo J. Parra-Montesinos and published by Springer Science & Business Media. This book was released on 2012-01-28 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Performance Fiber Reinforced Cement Composites (HPFRCC) represent a class of cement composites whose stress-strain response in tension undergoes strain hardening behaviour accompanied by multiple cracking, leading to a high strain prior to failure. The primary objective of this International Workshop was to provide a compendium of up-to-date information on the most recent developments and research advances in the field of High Performance Fiber Reinforced Cement Composites. Approximately 65 contributions from leading world experts are assembled in these proceedings and provide an authoritative perspective on the subject. Special topics include fresh and hardening state properties; self-compacting mixtures; mechanical behavior under compressive, tensile, and shear loading; structural applications; impact, earthquake and fire resistance; durability issues; ultra-high performance fiber reinforced concrete; and textile reinforced concrete. Target readers: graduate students, researchers, fiber producers, design engineers, material scientists.
