Effects of Strength, Permeability, and Air Void Parameters on Freezing-Thawing Resistance of Concrete with and Without Air Entrainment

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Total Pages : 20 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Effects of Strength, Permeability, and Air Void Parameters on Freezing-Thawing Resistance of Concrete with and Without Air Entrainment by : Gilson Lomboy

Download or read book Effects of Strength, Permeability, and Air Void Parameters on Freezing-Thawing Resistance of Concrete with and Without Air Entrainment written by Gilson Lomboy and published by . This book was released on 2009 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present research is aimed at investigating effects of concrete properties, particularly concrete rapid chloride permeability, strength, and air void parameters, on freezing-thawing (FT) resistance. In this study, concrete mixtures are made with different types of cement (Types I with 15 % class C fly ash and Type IP cements), different water-to-binder ratios (w/b=0.25, 0.35, 0.45, and 0.55), and with or without air entraining agent. The 28-day compressive strength, rapid chloride permeability, and FT durability of the concrete are determined according to ASTM C873, C1202, and C666A, respectively. The air void parameters of the concrete are measured with air void analyzer, Rapid Air, and porosity (ASTM C642) tests. The results indicate that although concrete made with a low w/b (≤0.35) has low rapid chloride permeability (≤1320 C), it generally still requires proper air entrainment for a desirable FT resistance (with a durability factor of ≥85 %), except for the concrete having very low rapid chloride permeability (520 C) and very high 28-day compressive strength (88 MPa or 12 760 psi). For the non-air-entrained concrete studied, there are clear relationships between FT durability and porosity, w/b, and permeability. However, such relationships do not exist for air-entrained concrete. The FT resistance of air-entrained concrete is largely dependent on the concrete air void characteristics.

Investigation Into Freezing-thawing Durability of Low Permeability Concrete with and Without Air Entraining Agent

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Total Pages : 52 pages
Book Rating : 4.:/5 (1 download)

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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).

Effect of Vibration on the Air Void Parameters and Freezing-thawing Resistance of Air-entrained Concrete

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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Effect of Vibration on the Air Void Parameters and Freezing-thawing Resistance of Air-entrained Concrete by : J. E. Backstrom

Download or read book Effect of Vibration on the Air Void Parameters and Freezing-thawing Resistance of Air-entrained Concrete written by J. E. Backstrom and published by . This book was released on 1957 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Entrained Air on Resistance to Accelerated Laboratory Freezing-and-thawing of Concrete Specimens Made with Expanded Lightweight Aggregates

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ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Effect of Entrained Air on Resistance to Accelerated Laboratory Freezing-and-thawing of Concrete Specimens Made with Expanded Lightweight Aggregates by : Waterways Experiment Station (U.S.)

Download or read book Effect of Entrained Air on Resistance to Accelerated Laboratory Freezing-and-thawing of Concrete Specimens Made with Expanded Lightweight Aggregates written by Waterways Experiment Station (U.S.) and published by . This book was released on 1958 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Freezing-and-thawing Tests of Concretes of Various Strengths and Air Contents

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ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Freezing-and-thawing Tests of Concretes of Various Strengths and Air Contents by : E. C. Roshore

Download or read book Freezing-and-thawing Tests of Concretes of Various Strengths and Air Contents written by E. C. Roshore and published by . This book was released on 1967 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Freeze-Thaw Durability of Concrete

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Publisher : CRC Press
ISBN 13 : 0203627091
Total Pages : 323 pages
Book Rating : 4.2/5 (36 download)

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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.

Effects of Air Void Parameters and Water/cementitious Ratio on the Durability Performance of Portland Cement Concrete

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ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Effects of Air Void Parameters and Water/cementitious Ratio on the Durability Performance of Portland Cement Concrete by : Richard A. Walls

Download or read book Effects of Air Void Parameters and Water/cementitious Ratio on the Durability Performance of Portland Cement Concrete written by Richard A. Walls and published by . This book was released on 2000 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Frost Resistance of Concrete

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Publisher : CRC Press
ISBN 13 : 0203627326
Total Pages : 400 pages
Book Rating : 4.2/5 (36 download)

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Book Synopsis Frost Resistance of Concrete by : R Auberg

Download or read book Frost Resistance of Concrete written by R Auberg and published by CRC Press. This book was released on 2004-03-01 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book forms the proceedings of the international workshop to be held in Essen, Germany. This workshop summarises the conclusion of the technical committee's investigations into the resistance of concrete to freeze-thaw attack, specific in this to resistance with or without de-icing chemicals. It presents the RILEM recommendations on testing the freeze-thaw and de-icing salt resistance of concrete.

Freezing and Thawing Resistance of High-strength Concrete

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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Freezing and Thawing Resistance of High-strength Concrete by : Robert E. Philleo

Download or read book Freezing and Thawing Resistance of High-strength Concrete written by Robert E. Philleo and published by . This book was released on 1986 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments have made a new generation of high-strength concrete a viable material for routine construction. The two principal developments are high-range water-reducing admixtures, which permit the placement of concrete of very low water-cement ratio, and silica fume, a pozzolan of extremely high fineness. The advent of this high- strength concrete has put requirements for strength and durability in conflict. Because entrained air reduces the strength of concrete, builders seek to eliminate or limit the use of entrained air. There are those who argue that high-strength concrete is of such a quality that entrained air is unnecessary. Much of the high-strength concrete currently being used is in buildings, where the question of durability is minor. The question, however, cannot be avoided in exposed highway structures. Service records of non-air-entrained high-strength concrete exposed to freezing are not conclusive. Hence, this report synthesizes the available knowledge on the subject. Its aim is to provide guidance to those who wish to use high-strength concrete in typical highway applications and to indicate where further information is needed.

Durability of Concrete in Cold Climates

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Publisher : CRC Press
ISBN 13 : 1482271443
Total Pages : 259 pages
Book Rating : 4.4/5 (822 download)

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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

A Study of Concrete Freeze-thaw Durability and Air Void Parameters

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (142 download)

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Book Synopsis A Study of Concrete Freeze-thaw Durability and Air Void Parameters by : Frederick Williamson

Download or read book A Study of Concrete Freeze-thaw Durability and Air Void Parameters written by Frederick Williamson and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of the knowledge that concrete freeze-thaw durability depends on the number, size, and spacing of air voids throughout the mass, rather than on the total volume of entrained air voids, study of the air void system of hardened concrete has become concentrated on the determination of significant air void parameters. This thesis presents the results of an investigation to determine relationships between freeze-thaw durability and air void parameters of hardened concrete. Specifically, the objective of this study was to establish the pattern of the relationships between concrete durability and both the void spacing factor and the specific surface of the voids. Eighteen concrete mixes, representing six air contents up to approximately nine per cent by volume, and three common cement contents, were prepared and tested during this program. Air void parameters of the hardened concrete, as determined by the lineal traverse method of microscopic examination (A.S.T.M. C 457 - 60T), were measured and related to freeze-thaw durability data obtained from tests performed in accordance with A.S.T.M. procedure C 290 - 57T. Compressive strength data were also obtained for all concrete mixes prepared. Compressive strength test results verified the well-known relationships involving strength, age, cement content, air content, and water-cement ratio. The most significant test results available from this investigation are those relating concrete freeze-thaw durability and air void parameters. It was found that air entrainment up to approximately six per cent air by volume improved the concrete freeze-thaw durability, by decreasing the air void size and spacing, and increasing the specific surface of the voids. At air contents greater than approximately six per cent, further air entrainment did not significantly improve the freeze-thaw durability. Freeze-thaw durability was found to be practically independent of both cement content and water-cement ratio, for air contents above approximately two per cent. Protection of concrete from freeze-thaw deterioration is thus more effectively realized by air entrainment, than by variations in cement content and/or water-cement ratio. Observed data showed that relationships between concrete durability and both specific surface and spacing factor are non-linear. A rapid increase in durability with decreasing void spacing indicates a critical void spacing factor of approximately 0.005 inch, for conditions of these tests.

Effect of Entrained Air on the Strength Permeability and Durability of Concrete

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ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Effect of Entrained Air on the Strength Permeability and Durability of Concrete by : Leonard Jerome Czyzewski

Download or read book Effect of Entrained Air on the Strength Permeability and Durability of Concrete written by Leonard Jerome Czyzewski and published by . This book was released on 1949 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Expert/knowledge-based Systems for Cement and Concrete

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ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (359 download)

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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:

High-Volume Mineral Admixtures in Cementitious Binders

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Publisher : Elsevier
ISBN 13 : 0443134995
Total Pages : 536 pages
Book Rating : 4.4/5 (431 download)

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Book Synopsis High-Volume Mineral Admixtures in Cementitious Binders by : Dan Tsang

Download or read book High-Volume Mineral Admixtures in Cementitious Binders written by Dan Tsang and published by Elsevier. This book was released on 2024-09-20 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-Volume Mineral Admixtures in Cementitious Binders: Towards Carbon-Neutral Construction delivers an overview of the broad applications of high-volume supplementary cementitious materials (SCMs) in cementitious binders, addressing the most promising ways to use them to reduce carbon emissions in the construction and building industry. This book focuses on the applications and scientific challenges of high-volume SCMs blends, elaborating on the possibilities as well as offering original perspectives on using different kinds of blended cements in the manufacturing process. Emphasis is placed on activity estimation and quality assessment, the properties of high-volume SCM-blends at both the fresh and hardened stages, self-hydraulic properties, and potential use as the sole binder, as well as associated environmental impacts and carbon footprint reduction. Presents the macro-/microproperties of high-volume (SCMs) cements. Introduces the state of the art in the use of high-volume SCM cements. Discusses the associated environmental impacts and the contribution to carbon neutrality by using high-volume SCMs. Associated with the disposal of man-made waste in the production of building materials. Discusses the advantages of using waste materials in cement production which reduce environmental impacts and contribute to sustainable development.

Freeze-thaw Resistance of Concrete with Marginal Air Content

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ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (1 download)

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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

INFLUENCE OF AIR-VOID SYSTEM ON FREEZE-THAW DURABILITY OF CONCRETE.

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ISBN 13 :
Total Pages : 530 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis INFLUENCE OF AIR-VOID SYSTEM ON FREEZE-THAW DURABILITY OF CONCRETE. by : ZAFAR AHMED MALIK

Download or read book INFLUENCE OF AIR-VOID SYSTEM ON FREEZE-THAW DURABILITY OF CONCRETE. written by ZAFAR AHMED MALIK and published by . This book was released on 1991 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-way analysis of variance showed that type of air entraining agent, quality of aggregate, and content of condensed silica fume have a major effect on freeze-thaw durability of concrete.

Investigation Into the Effect of Water-cement Ratio on the Freezing-thawing Resistance of Non-air and Air-entrained Concrete

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ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Investigation Into the Effect of Water-cement Ratio on the Freezing-thawing Resistance of Non-air and Air-entrained Concrete by :

Download or read book Investigation Into the Effect of Water-cement Ratio on the Freezing-thawing Resistance of Non-air and Air-entrained Concrete written by and published by . This book was released on 1955 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: