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Properties Of Air Bubbles In Air Entrained Concrete
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Book Synopsis Properties of Air Bubbles in Air Entrained Concrete by : Le Tuan Pham
Download or read book Properties of Air Bubbles in Air Entrained Concrete written by Le Tuan Pham and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is widely accepted that air entrainment, a purposeful introduction of small air bubbles in concrete, is critical to the long-term durability of concrete in freeze-thaw environments. Air entraining admixtures (AEA) are added to the mixture to stabilize air bubbles created during mixing, ensuring a proper air void system in the hardened concrete. Despite the complexity of creating a suitable air void system in concrete, previous study and experience established the reliability and robustness of such systems under a variety of conditions through use of neutralized vinsol resin (NVR) AEA products. In recent years, synthetic AEAs have been used more frequently due to limited supply of NVR to the concrete industry. With the use of synthetic AEAs, there are more reports of new problems including difficulties in accurately measuring the air content. This study was conducted to find the root cause of the increasing difficulties in controlling the air contents in portland cement concrete associated with synthetic AEAs. Main challenges included the lack of existing techniques to evaluate AEAs and air bubbles in concrete, and lack of data to help identify causes. Given these challenges, a multi-scale experimental study that included testing of field and laboratory concrete, and testing of foam and individual air bubbles was undertaken. The results indicate that the disparity between QC test results and the actual air contents in concrete pavements associated with the use of synthetic AEAs could be attributed to less robust air bubbles stabilized with synthetic AEAs compared to those entrained with NVR and the resulting increased loss of these air bubbles during concrete sampling. The cause of this decreased robustness and resulting air loss was traced directly to the properties of the bubble shells. The shells of air bubbles in concrete entrained with synthetic AEAs were thinner and less stiff than those associated with an NVR AEA. Through this research new test protocols were developed to measure stiffness and thickness of the shell of air bubbles extracted from cement paste and to quantify stability of foams of AEAs in a cementitious environment. These tests could be used by researchers and practitioners who are interested in developing new admixtures and/or identifying admixtures with undesirable performance.
Book Synopsis Air Entrainment in Concrete Design by : Waterways Experiment Station (U.S.)
Download or read book Air Entrainment in Concrete Design written by Waterways Experiment Station (U.S.) and published by . This book was released on 1947 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Review of Literature on Air-entrained Concrete by : Patrick H. Torrans
Download or read book Review of Literature on Air-entrained Concrete written by Patrick H. Torrans and published by . This book was released on 1968 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory of Air Entrainment by : Abdul Hameed Khan
Download or read book Theory of Air Entrainment written by Abdul Hameed Khan and published by . This book was released on 1949 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Properties of Concrete as Affected by Air-entrainment by : Hormoz Famili
Download or read book The Properties of Concrete as Affected by Air-entrainment written by Hormoz Famili and published by . This book was released on 1969 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Significance of Tests and Properties of Concrete and Concrete-making Materials by : Joseph F. Lamond
Download or read book Significance of Tests and Properties of Concrete and Concrete-making Materials written by Joseph F. Lamond and published by ASTM International. This book was released on 2006 with total page 661 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Air Entrainment and Cement Content on the Physical Properties of Concrete by : Charles Albert McMahon
Download or read book The Effect of Air Entrainment and Cement Content on the Physical Properties of Concrete written by Charles Albert McMahon and published by . This book was released on 1947 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Batch Size and Different Mixers on the Properties of Air-entrained Concrete by : R. F. Adams
Download or read book Effect of Batch Size and Different Mixers on the Properties of Air-entrained Concrete written by R. F. Adams and published by . This book was released on 1950 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Air Entrainment Upon Compressive Strength of Concrete by : Kent Albert Allemeier
Download or read book The Effect of Air Entrainment Upon Compressive Strength of Concrete written by Kent Albert Allemeier and published by . This book was released on 1948 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Entrainment in Concrete by : American Concrete Institute
Download or read book Air Entrainment in Concrete written by American Concrete Institute and published by . This book was released on 1947 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transport of Entrained Air Bubbles in Fresh Concrete Due to Pressure Variations by : Ravi Kumar Macha
Download or read book Transport of Entrained Air Bubbles in Fresh Concrete Due to Pressure Variations written by Ravi Kumar Macha and published by . This book was released on 1993 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Properties of Fresh Concrete by : Treval C. Powers
Download or read book The Properties of Fresh Concrete written by Treval C. Powers and published by John Wiley & Sons. This book was released on 1968 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Entrained Air written by and published by . This book was released on 1946 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Void Characteristics of Air-entrained Self-consolidating Concrete by : Mary Ellen Barfield
Download or read book Air Void Characteristics of Air-entrained Self-consolidating Concrete written by Mary Ellen Barfield and published by . This book was released on 2008 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Loss of Entrained Air in Freshly Mixed Concrete and the Effect of this Loss on the Properties of the Hardened Concrete by : H. L. Flack
Download or read book Loss of Entrained Air in Freshly Mixed Concrete and the Effect of this Loss on the Properties of the Hardened Concrete written by H. L. Flack and published by . This book was released on 1949 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Void Spacing as a Basis for Producing Air-entrained Concrete by : T. C. Powers
Download or read book Void Spacing as a Basis for Producing Air-entrained Concrete written by T. C. Powers and published by . This book was released on 1954 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Vibration Time Upon Loss of Entrained Air from Concrete Mixes by :
Download or read book Effect of Vibration Time Upon Loss of Entrained Air from Concrete Mixes written by and published by . This book was released on 1949 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: