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An Investigation Into The Effects Of Fly Ash On Freeze Thaw Durability Prediction
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Book Synopsis An Investigation Into the Effects of Fly Ash on Freeze-thaw Durability Prediction by : Yancy Schrader
Download or read book An Investigation Into the Effects of Fly Ash on Freeze-thaw Durability Prediction written by Yancy Schrader and published by . This book was released on 2020 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air is purposefully entrained into concrete primarily to improve resistance to freeze-thaw deterioration while saturated with water. Air entraining admixtures (AEAs) are chemical admixtures designed to entrain air into the concrete to provide adequate resistance to the effects of freezing and thawing. One of the challenges associated with air entrainment in concrete is the interaction of an AEA with supplementary cementitious materials present in the concrete, particularly fly ash. Fly ash is a by-product of the coal fired electrical generation industry, and often contains residual unburned carbon and other components that can increase the AEA demand of a particular concrete mix. Properly estimating the amount of AEA required to reach the specified air content in a concrete containing fly ash is of utmost importance to the ready mix concrete supplier, as an insufficient air content may lead to job site rejection and the resultant monetary losses. This study aimed to better relate fly ash and concrete properties obtainable prior to final concrete placement, to direct measures of concrete durability obtainable only after the concrete has set and been put into service. A new device known as the Super Air Meter (SAM) was studied concurrently to better examine the relationship between its System Air Metric number (SAM number) and hardened concrete durability properties. Generally, fly ashes with higher foam index values and surface areas required higher dosages of AEAs to reach a specified air content value. No such relationship could be determined with the more commonly available loss on ignition percentage of the fly ash. The SAM number correctly predicted an acceptable spacing factor in 9 out of 12 different concretes tested, although all of the concretes tested displayed poor performance in freeze-thaw durability. These results demonstrate that air content testing alone is not necessarily sufficient to ensure high quality, durable concrete structures.
Book Synopsis Significance of Interrupted Testing on the Freeze-Thaw Resistance of Fly Ash Concrete by ASTM C 666 (Method A) by : BW. Langan
Download or read book Significance of Interrupted Testing on the Freeze-Thaw Resistance of Fly Ash Concrete by ASTM C 666 (Method A) written by BW. Langan and published by . This book was released on 1987 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation studied the effect of interrupted testing combined with prolonged freezing on the freeze-thaw resistance of concretes containing fly ash as part of the cementitious fraction, using ASTM Test Method for Resistance of Concrete to Rapid Freezing and Thawing (C 666-84, Method A). Also studied was the effect of "marginal" air contents on the above test parameters. Test results indicate that for fly ash concretes with air contents in excess of 5%, interrupted and/or prolonged periods of freezing do not affect the freeze-thaw resistance of the concrete. Early age freezing (14 days) of fly ash concretes did not appear to be detrimental to the performance of the fly ash concretes tested.
Book Synopsis Effects of Various Fly Ashes on Compressive Strength, Resistance to Freezing and Thawing, Resistance to Sulfate Attack, and Adiabatic Temperature Rise of Concrete by : Kurt F. von Fay
Download or read book Effects of Various Fly Ashes on Compressive Strength, Resistance to Freezing and Thawing, Resistance to Sulfate Attack, and Adiabatic Temperature Rise of Concrete written by Kurt F. von Fay and published by . This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Pervious Concrete with Fly Ash Subjected to Freeze-thaw and Salt Exposure, in a Simulated Field Environment by : Ian Anderson
Download or read book Durability of Pervious Concrete with Fly Ash Subjected to Freeze-thaw and Salt Exposure, in a Simulated Field Environment written by Ian Anderson and published by . This book was released on 2012 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Therefore, the specific objectives of this study were to: (1) determine the effects of deicing salts on pervious concrete, using a modified and more field representative testing procedure that involves slow freeze-thaw cycling in drained condition, and (2) determine the effects of cement replacement with increasing amounts of fly ash on the freeze-thaw, durability of pervious concrete.
Book Synopsis Fly Ash Concrete by : Ken Isenberger
Download or read book Fly Ash Concrete written by Ken Isenberger and published by . This book was released on 1981 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of fly ash class, source and amount on the compressive strength and freeze-thaw durability of fly ash concrete.
Book Synopsis Development of a Test Procedure for Freeze-Thaw Durability of Geomaterials Stabilized With Fly Ash by : M. G. Rosa
Download or read book Development of a Test Procedure for Freeze-Thaw Durability of Geomaterials Stabilized With Fly Ash written by M. G. Rosa and published by . This book was released on 2016 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to develop a freeze-thaw cycling test procedure and to investigate how the volume, moisture content, resilient modulus (Mr), and unconfined compressive strength (qu) of geomaterials, including soils and recycled materials, stabilized with fly ash change after freeze-thaw cycling. Three different types of materials (fine-grained and coarse-grained soils and recycled pavement materials) and five different fly ashes were used at different percentages (10, 12, 14, and 20 % by dry weight). Both one-dimensional and three-dimensional freezing of the specimens were considered. Freezing in three-dimensional was faster in terms of completing the freeze-thaw cycling and provided very similar results to the ones prepared in one-dimensional. Thus, three-dimensional freezing was adopted in this study without access to water (i.e., closed system). The results of this study indicated that the volume of all soil-fly ash mixtures tended to increase after freeze-thaw cycling; however, the volume change was not significant. Resilient modulus tests were conducted on all unstabilized materials, as well as on their mixtures with fly ash, while qu tests were conducted only on fine-grained soil and their fly ash mixtures. The Mr of all mixtures with one exception decreased by an average of 28.5 % when specimens were subjected to freeze-thaw cycling. The drop in the Mr of the specimens leveled off after 5 freeze-thaw cycles. A general trend of higher Mr of materials stabilized with fly ash (from 3 to 168 %), even after freeze-thaw cycles compared to unstabilized material was observed. In general, a reduction in unconfined compressive strength (qu) after freeze-thaw cycles up to 70 % was obtained. However, results showed that qu of stabilized soils that were subjected to freeze-thaw cycles were still higher (from 6 to 157 %) than the qu of unstabilized soils.
Book Synopsis Freeze and Thaw Durability of Fly Ash Concrete by :
Download or read book Freeze and Thaw Durability of Fly Ash Concrete written by and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Freeze and Thaw Cycling on Soils Stabilized Using Fly Ash by : Maria G. Rosa
Download or read book Effect of Freeze and Thaw Cycling on Soils Stabilized Using Fly Ash written by Maria G. Rosa and published by . This book was released on 2006 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1996-12-19 with total page 285 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 internat
Book Synopsis Studies of Freeze-thaw Durability, the Air Void System and Associated Characteristics of Fly Ash Concrete by : Thomas Duane Larson
Download or read book Studies of Freeze-thaw Durability, the Air Void System and Associated Characteristics of Fly Ash Concrete written by Thomas Duane Larson and published by . This book was released on with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fly Ash in Concrete written by K. Wesche and published by CRC Press. This book was released on 1991-06-13 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a state-of-the-art report which documents current knowledge on the properties of fly ash in concrete and the use of fly ash in construction. It includes RILEM Recommendations on fly ash in concrete and a comprehensive bibliography including over 800 references.
Book Synopsis The Effects of Fly Ash and Water Reducing Agents on the Durability of Concrete by : David Wai Sum Ho
Download or read book The Effects of Fly Ash and Water Reducing Agents on the Durability of Concrete written by David Wai Sum Ho and published by . This book was released on 1981 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fly Ash Concrete Durability Containing Class II Durability Aggregates by : Sam G. Moussalli
Download or read book Evaluation of Fly Ash Concrete Durability Containing Class II Durability Aggregates written by Sam G. Moussalli and published by . This book was released on 1986 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fly ash was used in this evaluation study to replace 15% of the cement in Class C-3 concrete paving mixes.
Book Synopsis The Development and Freeze-thaw Durability of High Fly Ash Content Concrete by : Jamshid Sajadi
Download or read book The Development and Freeze-thaw Durability of High Fly Ash Content Concrete written by Jamshid Sajadi and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fly Ash and Freeze-thaw Resistance of Portland Cement Mortar in Deicer by : Robert Andrew Carnazzo
Download or read book Fly Ash and Freeze-thaw Resistance of Portland Cement Mortar in Deicer written by Robert Andrew Carnazzo and published by . This book was released on 1990 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fly Ash in Concrete by : Edward Amin Abdun-Nur
Download or read book Fly Ash in Concrete written by Edward Amin Abdun-Nur and published by . This book was released on 1961 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is based on a review of the literature on the subject from 1934-1959, supplemented by examination of structures in which fly ash was been used, visits to laboratories engaged in work on fly ash, discussions with individuals currently engaged in research and construction involving fly ash--all considered in the light of the writer's experience and judgment.
