Effect Of Temperature Rise And Fall On The Strength And Permeability Of Concrete Made With And Without Fly Ash PDF Download
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Author | : PL. Owens |
Publisher | : |
Total Pages | : 16 |
Release | : 1985 |
Genre | : Alkali-aggregate reaction |
ISBN | : |
Download Effect of Temperature Rise and Fall on the Strength and Permeability of Concrete Made With and Without Fly Ash Book in PDF, ePub and Kindle
The effect of temperature rise and fall on concrete at early ages is rarely measured. Concrete cured at elevated temperature has reduced strength at later ages. The changes that occur in the hydration products have been measured in terms of the amount of calcium hydroxide [Ca(OH)2] present. Since permeability is, to some degree, a function of the water/cement ratio and strength, the measurement of permeability was necessary. Concrete is more permeable after it has undergone a temperature cycle similar to that found in practice. The use of Class F fly ash can effectively reduce the permeability of heat-affected concrete.
Author | : Hamdi Celik Ozyildirim |
Publisher | : |
Total Pages | : 32 |
Release | : 1998 |
Genre | : Concrete |
ISBN | : |
Download Effects of Temperature on the Development of Low Permeability in Concretes Book in PDF, ePub and Kindle
This study evaluated the effects of temperature on the strength and permeability of concretes containing pozzolans (fly ash and silica fume) and slag. Two test programs were conducted. In the first, one control and five experimental mixtures containing silica fume, fly ash, or slag were evaluated. In the second, one control and three experimental mixtures containing fly ash or slag at a higher water-cementitious material ratio (W/CM) than used in the first program were evaluated. Concretes cured at higher temperatures had higher strengths up to 28 days but lower strengths at 1 year. Permeability decreased with time. Increasing early curing temperatures enabled the achievement of lower long-term permeability for 6 months and beyond at 28 days. Concretes containing a pozzolan or slag had a lower long-term permeability than the control. Adding a pozzolan was more effective in reducing permeability than reducing the W/CM. At cold temperatures, if the specified properties are not achieved, the contractor should change the mix design and/or provide insulating blankets and/or external heat to ensure the desired product.
Author | : Tarun R. Naik |
Publisher | : ASTM International |
Total Pages | : 193 |
Release | : 1985 |
Genre | : Technology & Engineering |
ISBN | : 9780803104358 |
Download Temperature Effects on Concrete Book in PDF, ePub and Kindle
Author | : Richard Scott Barrow |
Publisher | : |
Total Pages | : 178 |
Release | : 1988 |
Genre | : Concrete |
ISBN | : |
Download The Effect of Fly Ash on the Temperature Rise in Concrete Book in PDF, ePub and Kindle
Author | : Kurt F. von Fay |
Publisher | : |
Total Pages | : 68 |
Release | : 1995 |
Genre | : Concrete |
ISBN | : |
Download Effects of Various Fly Ashes on Compressive Strength, Resistance to Freezing and Thawing, Resistance to Sulfate Attack, and Adiabatic Temperature Rise of Concrete Book in PDF, ePub and Kindle
Author | : Leonard Jerome Czyzewski |
Publisher | : |
Total Pages | : 146 |
Release | : 1949 |
Genre | : |
ISBN | : |
Download Effect of Entrained Air on the Strength Permeability and Durability of Concrete Book in PDF, ePub and Kindle
Author | : I. Soroka |
Publisher | : CRC Press |
Total Pages | : 251 |
Release | : 1993-09-16 |
Genre | : Architecture |
ISBN | : 0203473639 |
Download Concrete in Hot Environments Book in PDF, ePub and Kindle
Elevated temperatures are known to affect the properties of both fresh and hardened concrete. This book describes in detail these effects and explains the mechanisms involved with particular reference to their practical aspects.
Author | : W. H. Chamberlin |
Publisher | : |
Total Pages | : 22 |
Release | : 1953 |
Genre | : |
ISBN | : |
Download Effect of Fly Ash, Calcium Chloride, and Temperature on the Compressive Strength of Concrete Containing Entrained Air Book in PDF, ePub and Kindle
Author | : Terence Michael Browne |
Publisher | : |
Total Pages | : 192 |
Release | : 1994 |
Genre | : Concrete |
ISBN | : |
Download The Effects of Elevated Temperatures on the Strength Development of High Strength Concrete with Fly Ash Book in PDF, ePub and Kindle
Author | : Achintya Kr Chattopadhyay |
Publisher | : LAP Lambert Academic Publishing |
Total Pages | : 124 |
Release | : 2012-03 |
Genre | : |
ISBN | : 9783848418343 |
Download Fly Ash Concrete at Fire Temperatures Book in PDF, ePub and Kindle
Fly-ash has become an important raw material for preparation of sustainable concrete. Several investigations have proved fly ash concrete to be superior than ordinary concrete, in ambient temperature, in terms of strength as well as on durability. Performances of fly ash concrete in different aggressive environment, though, are yet to be investigated. Present experimental study has been made to see the performances of such concrete at fire conditions. A newer approach of mix design of concrete has been adopted here by substituting a part of cement by fly ash weighing twice that of cement, without addition of any chemical admixture. This has made it unique from earlier works done with equal fly ash substitution for cement replaced. The book has been prepared with a brief introduction, brief description of rheology of fly ash concrete, review of literatures available on behavior of concrete at high temperatures, experimental programme, results, discussion along with a concluding remarks. The book will be helpful for the students and researchers working on properties of concrete. As well as it will help graduate students and professionals working with fly ash concrete in construction.