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:

Download or read book Significance of Tests and Properties of Concrete and Concrete Aggregates written by and published by ASTM International. This book was released on 1956 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Reports written by United States. Bureau of Reclamation. Technical Library, Denver and published by . This book was released on 1952 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Significance of Tests and Properties of Concrete and Concrete Making Materials written by and published by ASTM International. This book was released on 1978 with total page 875 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Significance of Tests and Properties of Concrete and Concrete Making Materials written by C. H. Best and published by ASTM International. This book was released on 1985-02 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by and published by . This book was released on 1982 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Significance of Tests and Properties of Concrete and Concrete making Materials written by Paul Klieger and published by ASTM International. This book was released on 1994 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Air Content in Concrete written by David Whiting and published by Transportation Research Board National Research. This book was released on 1983 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to Laboratory and Other Numbered Reports written by Ferdinand Stenger and published by . This book was released on 1957 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book Concrete Solutions written by Michael Grantham and published by CRC Press. This book was released on 2009-06-10 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete repair continues to be a subject of major interest to engineers and technologists worldwide. The concrete repair budget for the UK alone currently runs at some UKP 220 per annum. Some estimates have indicated that, worldwide, in 2010 the expenditure for maintenance and repair work will represent about 85% of the total expenditure in the co

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:

Download or read book Journal of the Construction Division written by American Society of Civil Engineers. Construction Division and published by . This book was released on 1978 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASTM Special Technical Publication written by and published by . This book was released on 1978 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Standard Practice for Concrete Pavements written by and published by . This book was released on 1987 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Entrainment in Mass Concrete written by William O. Tynes and published by . This book was released on 1969 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: