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Freeze Thaw Resistance Of Concrete With Marginal Air Content
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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
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 Expert/knowledge-based Systems for Cement and Concrete by : Lawrence J. Kaetzel
Download or read book Expert/knowledge-based Systems for Cement and Concrete written by Lawrence J. Kaetzel and published by . This book was released on 1991 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 2002 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation Into Freezing-thawing Durability of Low Permeability Concrete with and Without Air Entraining Agent by : Kejin Wang
Download or read book Investigation Into Freezing-thawing Durability of Low Permeability Concrete with and Without Air Entraining Agent written by Kejin Wang and published by . This book was released on 2009 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the present study is to investigate the effect of low-permeability concrete, made with reduced water-to-binder ratios (w/b) and/or supplementary cementitious materials (SCMs), on the need for air entrainment to achieve freezing-thawing (F-T) durability. In the present study, concrete mixes were made with different types of cement (Type I and IP), with or without fly ash replacement (15%), with different water-to-binder ratios (w/b=0.25, 0.35, 0.45 and 0.55), and with or without air entraining agent (AEA). All concrete mixtures were controlled to have a similar slump by using different dosages of superplasticizer. The rapid chloride permeability and F-T durability of the concrete samples were determined according to ASTM C1202 and ASTM C666A, respectively. The air void structure of the concrete was studied using the Air Void Analyzer, Rapid Air, and porosity tests (ASTM C642). In addition, the general concrete properties, such as slump, air content, unit weight, and 28-day compressive strength, were evaluated. The results indicate that all concrete mixes with proper air entrainment (ASTM C23 air content greater than or equal to 6%) showed good F-T resistance (durability factor greater than or equal to 86%). All concrete mixes without AEA showed poor F-T resistance (durability factor less than 40%), except for one mix that had very low permeability and high strength. This was the concrete made with Type IP cement and with a w/b of 0.25, which had a permeability of 520 coulombs and a compressive strength of 12,760 psi (88 MPa). There were clear relationships between the F-T durability and hardened concrete properties of non-air entrained concrete. However, such relationships did not exist in concrete with AEA. For concrete with AEA, good F-T durability was associated with an air void spacing factor less than or equal to 0.28 mm (by AVA) or less than or equal to 0.22 mm (by RapidAir).
Book Synopsis Concrete Under Severe Conditions by : Koji Sakai
Download or read book Concrete Under Severe Conditions written by Koji Sakai and published by Taylor & Francis US. This book was released on 1995 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deicer-freezer-thaw Resistance Characteristics of Portland Cement Concrete for Wisconsin Pavements by : Steven M. Cramer
Download or read book Deicer-freezer-thaw Resistance Characteristics of Portland Cement Concrete for Wisconsin Pavements written by Steven M. Cramer and published by . This book was released on 1995 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resistance of Concrete to Freezing and Thawing by : Donald J. Janssen
Download or read book Resistance of Concrete to Freezing and Thawing written by Donald J. Janssen and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study, aimed at improving the freeze-thaw resistance of concrete, consists of three parts. Part I evaluates parameters affecting the freeze-thaw durability of concrete. A modification of the existing standard of method for determining the durability factor of concrete specimens is proposed, and a new procedure for fundamental transverse frequency (used in durability factor calculations) has been developed. Part II focuses on developing better methods for identifying nondurable aggregates, and has resulted in a rapid new test based on the hydraulic fracture of aggregates. Part III describes field experiments to evaluate the freeze-thaw resistance of a number of specified concrete mixes and the use of sealants to mitigate D-cracking. Preliminary field performance results are presented.
Book Synopsis Concrete Mix Design, Quality Control and Specification, Fourth Edition by : Ken W. Day
Download or read book Concrete Mix Design, Quality Control and Specification, Fourth Edition written by Ken W. Day and published by CRC Press. This book was released on 2013-11-11 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of concrete is rapidly changing, and with it, there are rising concerns. Thoroughly revised and updated, this fourth edition of Concrete Mix Design, Quality Control and Specification addresses current industry practices that provide inadequate durability and fail to eliminate problems with underperforming new concrete and defective testing. Many specifications now require additional criteria in an attempt to improve durability or other properties. This book discusses the trend towards adding performance requirements to existing prescriptive specifications. It also explores the matter of prescription versus performance specification and especially the specification of non-strength-related performance such as durability. What’s new in the Fourth Edition: Examines water-to-cement ratio as a declining criterion of quality and durability Discusses the diminishing availability of suitable natural sands and growing industry concerns regarding the environmental impact of their use Considers advances in concrete admixtures and their ever-increasing use Advocates reliability of testing as a vital feature of the shift from prescriptive to performance specifications Addresses cement replacement materials as they relate to greenhouse gas and sustainability Concrete Mix Design, Quality Control and Specification explores producing, designing, controlling, or specifying concrete, and addresses issues related with sustainability and the impact of new concrete materials such as ready mixed geopolymers, magnesium oxide, and calcium carbonate. The text is an ideal resource for concrete technologists, producers and specifiers, and contractors on large projects
Book Synopsis Recycled Aggregate in Concrete by : Jorge de Brito
Download or read book Recycled Aggregate in Concrete written by Jorge de Brito and published by Springer Science & Business Media. This book was released on 2012-11-28 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is the most used man-made material in the world since its invention. The widespread use of this material has led to continuous developments such as ultra-high strength concrete and self-compacting concrete. Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste focuses on the recent development which the use of various types of recycled waste materials as aggregate in the production of various types of concrete. By drawing together information and data from various fields and sources, Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste provides full coverage of this subject. Divided into two parts, a compilation of varied literature data related to the use of various types of industrial waste as aggregates in concrete is followed by a discussion of the use of construction and demolition waste as aggregate in concrete. The properties of the aggregates and their effect on various concrete properties are presented, and the quantitative procedure to estimate the properties of concrete containing construction and demolition waste as aggregates is explained. Current codes and practices developed in various countries to use construction and demolition waste as aggregates in concrete and issues related to the sustainability of cement and concrete production are also discussed. The comprehensive information presented in Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste will be helpful to graduate students, researchers and concrete technologists. The collected data will also be an essential reference for practicing engineers who face problems concerning the use of these materials in concrete production.
Book Synopsis Annual Report of Progress on Engineering Research by : United States. Bureau of Reclamation
Download or read book Annual Report of Progress on Engineering Research written by United States. Bureau of Reclamation and published by . This book was released on 1960 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ICE Handbook of Concrete Durability by : Marios Soutsos
Download or read book ICE Handbook of Concrete Durability written by Marios Soutsos and published by Emerald Group Publishing. This book was released on 2023-10-24 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: ICE Handbook of Concrete Durability, second edition is a comprehensive practical reference for professionals involved in design and maintenance of concrete structures of all types. It is an invaluable guide for construction professionals, including design engineers, consultants and contractors, as well as postgraduate students.
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 Frost Resistance of Portland Cement Concrete Prepared with Chemical and Mineral Admixtures at Marginal Air Content by : Shamshad Ahmad Khan
Download or read book Frost Resistance of Portland Cement Concrete Prepared with Chemical and Mineral Admixtures at Marginal Air Content written by Shamshad Ahmad Khan and published by . This book was released on 1992 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research, Engineering Methods and Materials by : United States Reclamation Bureau
Download or read book Research, Engineering Methods and Materials written by United States Reclamation Bureau and published by . This book was released on 1960 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations Publisher : ISBN 13 : Total Pages :1418 pages Book Rating :4.F/5 ( download)
Book Synopsis Department of Transportation and Related Agencies Appropriations for 2003 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Download or read book Department of Transportation and Related Agencies Appropriations for 2003 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 2002 with total page 1418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations Publisher : ISBN 13 : Total Pages :1400 pages Book Rating :4.:/5 (319 download)
Book Synopsis Department of Transportation and Related Agencies Appropriations for 2003: Department of Transportation, Federal Motor Carrier Safety Administration by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Download or read book Department of Transportation and Related Agencies Appropriations for 2003: Department of Transportation, Federal Motor Carrier Safety Administration written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 2002 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
