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Influence Of Pumping Parameters On The Freeze Thaw And Scaling Resistance Of Highly Workable Concrete
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Book Synopsis Influence of Pumping Parameters on the Freeze-thaw and Scaling Resistance of Highly Workable Concrete by : Alexandra Nicole Wehar
Download or read book Influence of Pumping Parameters on the Freeze-thaw and Scaling Resistance of Highly Workable Concrete written by Alexandra Nicole Wehar and published by . This book was released on 2019 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Over the past 60 years, pumping concrete has gained popularity due to the economic and technical benefits that typically accompanies it. However, boom configuration and flow rate can adversely affect freeze-thaw and scaling resistance of concrete due to the effects of pressure on the air-void system. Therefore, the objective of this research is to assess the influence of different pumping parameters on the durability of hardened self-consolidating concrete. Self-consolidating, flowable, and conventional concrete mixtures were tested during large scale pumping experiments positioning the pump boom in an 'A' and a flat shape as well as using different pumping speeds. In addition, the effect of adding a reducer and submerging the discharge hose into concrete to minimize the impact on the concrete air-void system was also explored. While pumping, the concrete fresh properties, including the air content were measured. The freeze-thaw durability and scaling resistance were tested for both pumped and non-pumped samples. Furthermore, the air-void size distribution in the hardened state was measured. During pumping, considerable changes in fresh air content were observed from sample to sample. Hardened results indicated that different pumping parameters induced different changes in the air-void system, most importantly the spacing factor. The most notable increases in spacing factor were observed when increasing the flow rate in the A configuration for self-consolidating and flowable mixtures and adding a reducer in the A configuration with self-consolidating concrete. The changes in air-void system corresponded to changes in the severity of scaling. A poor air-void system led to lower scaling resistance. Mixtures with higher air content showed fewer signs that pumping affects the freeze-thaw or scaling resistance"--Abstract, page iii.
Book Synopsis Freeze-Thaw Durability of Concrete by : J. Marchand
Download or read book Freeze-Thaw Durability of Concrete written by J. Marchand and published by CRC Press. This book was released on 2004-03-01 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete durability in climates where freezing and thawing occurs is a continuing problem. It is particularly acute for highway and bridge structures, where de-icing salts are used to combat the effects of frost, snow and ice. These salts can cause damage to concrete and accelerate corrosion of reinforcements. This book presents the latest international research on this area, with contributions from North America and Europe which were presented at an international RILEM workshop.
Book Synopsis Effect of Temperature-Match-Curing on Freeze-Thaw and Scaling Resistance of High-Strength Concrete by : JA. Jonsson
Download or read book Effect of Temperature-Match-Curing on Freeze-Thaw and Scaling Resistance of High-Strength Concrete written by JA. Jonsson and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a part of a comprehensive study to evaluate the effects of elevated curing temperatures on hardened concrete properties, four non-air-entrained high-strength concrete (HSC) mixtures were prepared at temperatures ranging from 10 to 35°C. After mixing, 5.5 liters of concrete were placed inside a large polystyrene block to simulate temperature development in HSC structural members. The concrete temperature inside the block was continuously monitored with thermocouples, and collected temperature information was used to simultaneously temperature-match-cure (TMC) a series of compressive strength, scaling, and freeze-thaw specimens. The maximum recorded temperatures ranged from 59 to 69°C, depending on the fresh concrete temperature. Control specimens from each of the four mixtures were cured at room temperature. Based on the amount of residue collected during scaling tests in the presence of 3% NaCl solution, the TMC specimens were 7-63 times less resistant than the control specimens. However, during the freezing and thawing tests, seven of the eight TMC specimens outperformed their respective control specimens.
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 PRO 24: International RILEM Workshop on Frost Resistance of Concrete - From Nano-Structure and Pore Solution to Macroscopic Behaviour and Testing by : Max J. Setzer
Download or read book PRO 24: International RILEM Workshop on Frost Resistance of Concrete - From Nano-Structure and Pore Solution to Macroscopic Behaviour and Testing written by Max J. Setzer and published by RILEM Publications. This book was released on 2002 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environment-Friendly Construction Materials by : Shaopeng Wu
Download or read book Environment-Friendly Construction Materials written by Shaopeng Wu and published by MDPI. This book was released on 2019-06-20 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Construction materials are the most widely used materials for civil infrastructure in our daily lives. However, from an environmental point of view, they consume a huge amount of natural resources and generate the majority of greenhouse gasses. Therefore, many new and novel technologies for designing environmentally friendly construction materials have been developed recently. This Special Issue, “Environment-Friendly Construction Materials”, has been proposed and organized as a means to present recent developments in the field of construction materials. It covers a wide range of selected topics on construction materials.
Download or read book ACI Structural Journal written by and published by . This book was released on 1994 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concrete Durability by : Thomas Dyer
Download or read book Concrete Durability written by Thomas Dyer and published by CRC Press. This book was released on 2014-05-01 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written specifically for the young professional and addressing a growing need for a long service life with minimal maintenance, Concrete Durability takes a whole new look at the whole-life performance of structures. This text examines physical and chemical issues that can threaten the durability of concrete. It explores available options for achiev
Book Synopsis High Performance Concrete by : Y. Malier
Download or read book High Performance Concrete written by Y. Malier and published by CRC Press. This book was released on 2018-05-08 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough review of properties, durability and use of high performance concrete, derived from recent research and experience. This book contains contributions from the leading French, Canadian and Swiss researchers, designers and material specialists, translated into English for the first time.
Author :Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure Publisher :National Academies Press ISBN 13 :0309562317 Total Pages :125 pages Book Rating :4.3/5 (95 download)
Book Synopsis Nonconventional Concrete Technologies by : Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure
Download or read book Nonconventional Concrete Technologies written by Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure and published by National Academies Press. This book was released on 1997-04-08 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure identifies research and development opportunities in innovative, nonconventional materials and processes that have the potential to accelerate the construction process, improve the durability of highway pavement and bridges, and enhance the serviceability and longevity of new construction under adverse conditions.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1952 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete International written by and published by . This book was released on 1980 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corrosion of Steel in Concrete by : Luca Bertolini
Download or read book Corrosion of Steel in Concrete written by Luca Bertolini and published by John Wiley & Sons. This book was released on 2013-02-26 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel-reinforced concrete is used ubiquitously as a building material due to its unique combination of the high compressive strength of concrete and the high tensile strength of steel. Therefore, reinforced concrete is an ideal composite material that is used for a wide range of applications in structural engineering such as buildings, bridges, tunnels, harbor quays, foundations, tanks and pipes. To ensure durability of these structures, however, measures must be taken to prevent, diagnose and, if necessary, repair damage to the material especially due to corrosion of the steel reinforcement. The book examines the different aspects of corrosion of steel in concrete, starting from basic and essential mechanisms of the phenomenon, moving up to practical consequences for designers, contractors and owners both for new and existing reinforced and prestressed concrete structures. It covers general aspects of corrosion and protection of reinforcement, forms of attack in the presence of carbonation and chlorides, problems of hydrogen embrittlement as well as techniques of diagnosis, monitoring and repair. This second edition updates the contents with recent findings on the different topics considered and bibliographic references, with particular attention to recent European standards. This book is a self-contained treatment for civil and construction engineers, material scientists, advanced students and architects concerned with the design and maintenance of reinforced concrete structures. Readers will benefit from the knowledge, tools, and methods needed to understand corrosion in reinforced concrete and how to prevent it or keep it within acceptable limits.
Book Synopsis Design and Control of Concrete Mixtures by : Steven H. Kosmatka
Download or read book Design and Control of Concrete Mixtures written by Steven H. Kosmatka and published by . This book was released on 1988 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland Cement Association reference, dealing with fundamentals, cold weather concreting, curing, admixtures, aggregates, mixing, and much more.
Book Synopsis PPI Core Engineering Concepts for Students and Professionals – A Comprehensive Reference Covering Thousands of Engineering Topics by : Michael R. Lindeburg
Download or read book PPI Core Engineering Concepts for Students and Professionals – A Comprehensive Reference Covering Thousands of Engineering Topics written by Michael R. Lindeburg and published by Professional Publications Incorporated. This book was released on 2010-03 with total page 1450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Find the answers to your engineering questions with Core Engineering Concepts for Students and Professionals. This authoritative reference provides comprehensive coverage of thousands of engineering concepts in one convenient book, including topics covered in 4- and 5-year engineering degree programs and those encountered in practice. Core Engineering Concepts is a cross-disciplinary reference that can be used by engineers studying or practicing in any engineering field, including civil, mechanical, electrical, structural, environmental, industrial, and chemical engineering. Written for both students and practitioners by a professional engineer, it incorporates more than 30 years of engineering experience. "Core Engineering Concepts is a unique book. It's a blend of the most useful concepts taught in college and the most useful practical knowledge learned afterward."--Michael R. Lindeburg, PE The Go-To Reference for Engineering Students and Professionals- Covers the breadth of a 4-year engineering degree- Contains civil, mechanical, electrical, chemical, and industrial engineering subjects- Features 82 chapters covering thousands of engineering concepts- Contains more than 580 examples with step-by-step solutions- Presents over 3,700 essential engineering equations and formulas- References over 780 tables and 315 conversion factors in detailed appendices- Lists fully defined nomenclature for each chapter- Includes a comprehensive index Topics Covered- Atomic Theory- Biology- Chemistry- Circuits- Computer Programming- Dynamics- Engineering Licensure- Engineering Management- Fluids- Heat Transfer- Material Science- Mathematics- Mechanics of Materials- Physical Representation- Physics- Statics- Systems Analysis- Thermodynamics
Book Synopsis Performance-Based Specifications and Control of Concrete Durability by : Hans Beushausen
Download or read book Performance-Based Specifications and Control of Concrete Durability written by Hans Beushausen and published by Springer. This book was released on 2015-09-24 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work gives an overview of significant research from recent years concerning performance-based design and quality control for concrete durability and its implementation. In engineering practice, performance approaches are often still used in combination with prescriptive requirements. This is largely because, for most durability test methods, sufficient practical experience still has to be gained before engineers and owners are prepared to fully rely on them. This book, compiled by RILEM TC 230-PSC, is intended to assist efforts to successfully build the foundation for the full implementation of performance-based approaches through the exchange of relevant knowledge and experience between researchers and practitioners worldwide.
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.
