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Factors Influencing Flow And Strength Of Standard Mortars And Reappraisal Of Astm Test Methods For Fly Ash
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Book Synopsis Factors Influencing Flow and Strength of Standard Mortars and Reappraisal of ASTM Test Methods for Fly Ash by : R. Helmuth
Download or read book Factors Influencing Flow and Strength of Standard Mortars and Reappraisal of ASTM Test Methods for Fly Ash written by R. Helmuth and published by . This book was released on 1996 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modified Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland-Cement Concrete (ASTM C 311) Pozzolanic (Strength) Activity Index tests with five fly ashes and two portland cements were done to compare results with those of standard tests. When sand contents (at constant water and cement contents) were varied, strengths of 38°C cured mortars decreased (−30 to −50 kPa/g of sand added in mixes containing 1370 to 1570 grams of sand) for different cement/fly ash blends. When water contents (at constant sand contents) were varied, strengths varied (−125 to +190 kPa/mL), strengths tending to increase because of paste volume increases with water content. Flow of mortars in both kinds of tests increase nearly linearly with paste volume fractions; the slopes are related by a factor of 0.60 ± 0.04. Accelerated curing at 38°C for tests at 28 days usually yields higher relative strengths than after curing at 23°C for 91 days. Multiple linear regression equations using both kinds of test data are solved at specified flow and strength values to determine proportions and mortar volume yields. This more general performance test ranks fly ashes (or cementitious mixtures) by mortar volume yield at equal flow and strength, and is suggested as a candidate to replace the present Strength Activity Index test.
Book Synopsis Factors Influencing Flow and Strength of Standard Mortars and Reappraisal of the Pozzolanic Activity Index Test by : R. A. Helmuth
Download or read book Factors Influencing Flow and Strength of Standard Mortars and Reappraisal of the Pozzolanic Activity Index Test written by R. A. Helmuth and published by . This book was released on 1994 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cement, Concrete and Aggregates by : American Society for Testing and Materials
Download or read book Cement, Concrete and Aggregates written by American Society for Testing and Materials and published by . This book was released on 1994 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Small Business. Subcommittee on Rural Development, Entrepreneurship, and Trade Publisher : ISBN 13 : Total Pages :204 pages Book Rating :4.:/5 (318 download)
Book Synopsis Coal Combustion Byproducts by : United States. Congress. House. Committee on Small Business. Subcommittee on Rural Development, Entrepreneurship, and Trade
Download or read book Coal Combustion Byproducts written by United States. Congress. House. Committee on Small Business. Subcommittee on Rural Development, Entrepreneurship, and Trade and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The subcommittee has called this hearing so that members might learn more about coal ash, the small businesses that turn coal ash into useful products and the concerns that these businesses have about the proposed Federal regulations that they believe may have a negative effect on their industry ... The EPA has recently issued two proposals for regulating coal ash. One would regulate coal ash as a solid waste and would provide very limited Federal enforceability and may not provide adequate protection of the environment and human health. The other would list coal ash as a special waste under the Hazardous Waste Subtitle in the Resource Conservation and Recovery Act, Subtitle C. The second option is one that we will focus on ... since it has generated great concerns among small businesses across this country. These businesses, many of which are represented here today, have reason to believe that regulating coal ash under Subtitle C, even as a special waste, will open recycling operations to added litigation and a stigma that will discourage the ... use of the products made with recycled coal ash."--P. 1-2.
Book Synopsis ACI Manual of Concrete Practice by : American Concrete Institute
Download or read book ACI Manual of Concrete Practice written by American Concrete Institute and published by . This book was released on 2002 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Technology Today written by and published by . This book was released on 1980 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Factors Affecting Cement Mortar Strength Results Using ASTM Standard Test Methods C 348 and C 349 by : NG. Zoldners
Download or read book Some Factors Affecting Cement Mortar Strength Results Using ASTM Standard Test Methods C 348 and C 349 written by NG. Zoldners and published by . This book was released on 1973 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine the effect of certain factors on test results when using ASTM Methods C 348 and C 349. For this purpose, four series of 3 mortar mixes each were made, and companion test specimens were molded using both hand tamping and vibrating methods. The results showed that, (1) Compaction of mortar test prisms by hand tamping produced densities which increased from the center towards both ends of the prism by an average of 2.1 percent; whereas this increase for prisms which were compacted by vibration averaged only 0.3 percent: (2) Compressive strengths by modified cube tests at the end locations averaged 5.6 percent higher than those at the middle of broken halves of the prisms compacted by hand tamping, but there was only 0.7 percent difference in strengths for the prisms compacted by vibration (Series IV): (3) The density of prisms compacted by vibration was, on the average, 3 percent less than that of tamped prisms. However, their flexural strength, on the average, was 8.5 percent higher than that of prisms compacted by tamping. (4) In comparison with standard 2-in. (50 mm) cube strengths, the compressive strengths of modified cube tests at the middle of broken halves and at the end of the prism averaged 96.0 and 101.7 percent, respectively, for tamped or 96.2 and 96.8 percent, respectively, for vibrated test specimens.
Download or read book Highway Research Abstracts written by and published by . This book was released on 1994 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Alkali Content of Fly Ash on Effectiveness in Preventing Expansion of Concrete by : U.S. Army Engineer Waterways Experiment Station
Download or read book Influence of Alkali Content of Fly Ash on Effectiveness in Preventing Expansion of Concrete written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1963 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on with total page 2762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Fly Ash and Chromium Characteristics on Compressive Strength of Mortar and Concrete by : Lin Wang
Download or read book Influence of Fly Ash and Chromium Characteristics on Compressive Strength of Mortar and Concrete written by Lin Wang and published by . This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behavior of cement mortar incorporating fly ash varies with chemical and physical characteristics of fly ash. Of many parameters affecting the compressive strength of fly ash mortar, five were investigated in this study. They are the particle size, the particle size distribution, fineness of fly ash, the CaO content and the Fe2O3 content. Fly ashes from two different sources were used in this study. One comes from the Public Service Electric and Gas (PSE & G)'s electrical generation station in Hudson County and the other is from the PSE & G plant in Mercer County. Each was separated into seven different particle size ranges. The results of the tests indicated that there are direct relationships between the particle size, Blaine fineness, mean diameter of fly ash and the compressive strength. Fe2O3 content of fly ash is not found to have a notable effect on the mortar strength. CaO content of fly ash varying from 2.47% to 6.76% also has no significant effect on the strength of mortar. Additionally, the effect of chromium on cement mortar and concrete was studied. Trivalent and haxavalent [sic] chromium were used in the experiment. The compressive strength of mortar and concrete incorporating Cr(III), as well as mortar and concrete incorporating Cr(VI) were tested up to 180 days according to ASTM C-109. Leaching tests were conducted with different pH extractants. The results of the tests showed that the leaching characteristic of Cr(III) mortar and Cr(VI) mortar are different. The influence of Cr(III), and Cr(VI) on compressive strength of mortar and concrete is also varied. The results of leaching tests indicated that cement is very good for immobilizing Cr(III) under field condition, unless the pH is extremely low. However, Cr(VI) can be leached from the mortar at early ages. The compressive strength of Cr(III) mortar and concrete is higher than that of the conventional mortar and concrete at all ages. But the strength of Cr(VI) mortar and concrete is lower than that of the conventional mortar and concrete. A major finding was the discovery of significant amount of soluble chromium in Mercer fly ashes. The results show that the majority of the chromium in Mercer fly ash is concentrated in the small particles, those in the 0-10 micron range.
Book Synopsis Monitoring and Evaluation of Fly Ash Stabilization Stabilized Subgrade Constructed by the WisDOT by : Tuncer Edil
Download or read book Monitoring and Evaluation of Fly Ash Stabilization Stabilized Subgrade Constructed by the WisDOT written by Tuncer Edil and published by . This book was released on 2010 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compressive Strength-maturity Relationships of Mortar Containing Fly Ash by : Steven A. Ragan
Download or read book Compressive Strength-maturity Relationships of Mortar Containing Fly Ash written by Steven A. Ragan and published by . This book was released on 1984 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Questions Concerning ASTM Standards and Methods of Testing Fly Ash for Use with Portland Cement by : R. Helmuth
Download or read book Some Questions Concerning ASTM Standards and Methods of Testing Fly Ash for Use with Portland Cement written by R. Helmuth and published by . This book was released on 1983 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Fly Ash in Soil-cement by : Chester W. Jones
Download or read book Use of Fly Ash in Soil-cement written by Chester W. Jones and published by . This book was released on 1986 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Influencing the Strength of Fly Ash Concrete by : Saady Amin
Download or read book Factors Influencing the Strength of Fly Ash Concrete written by Saady Amin and published by . This book was released on 2003 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates Publisher : ISBN 13 : Total Pages :0 pages Book Rating :4.:/5 (869 download)
Book Synopsis Standard Test Methods for Sampling and Testing Fly Ash Or Natural Pozzolans for Use in Portland-Cement Concrete by : American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates
Download or read book Standard Test Methods for Sampling and Testing Fly Ash Or Natural Pozzolans for Use in Portland-Cement Concrete written by American Society for Testing and Materials. Committee C-9 on Concrete and Concrete Aggregates and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
