Determination of the Cement Content of Hardened Concrete by Selective Solution PDF Download
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Author: Gerardo G. Clemeña
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 38
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Book Description
The method of selective solution by methanolic maleic acid, developed by Tabikh et. al for the determination of cement content in hardened concrete, was evaluated. It was found to be relatively simple and inexpensive, and is accurate to within ±1 percentage point cement at the 95% confidence level with the use of calibration curves. Such factors as aggregate and cement compositions, curing time, and water-cement ratio were investigated as to their effects on the method. Among these factors, aggregate composition was the only one found to have a significant effect on the analytical results. The determination of cement content by the measurement of the specific gravity increase in a methanolic maleic acid solution was also investigated, but was found to have unsatisfactory precision.
Author: Gerardo G. Clemeña
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 38
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Book Description
The method of selective solution by methanolic maleic acid, developed by Tabikh et. al for the determination of cement content in hardened concrete, was evaluated. It was found to be relatively simple and inexpensive, and is accurate to within ±1 percentage point cement at the 95% confidence level with the use of calibration curves. Such factors as aggregate and cement compositions, curing time, and water-cement ratio were investigated as to their effects on the method. Among these factors, aggregate composition was the only one found to have a significant effect on the analytical results. The determination of cement content by the measurement of the specific gravity increase in a methanolic maleic acid solution was also investigated, but was found to have unsatisfactory precision.
Author:
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 875
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Book Description
Author: V.S. Ramachandran
Publisher: Elsevier
ISBN: 0815517386
Category : Technology & Engineering
Languages : en
Pages : 995
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Book Description
Measuring the long-term durability of new types of concrete and concrete technologies is crucial to their acceptance in the marketplace. This long-needed handbook of analytical techniques provides a complete reference to the cutting-edge procedures used to test today's innovative materials. Ranging from chemical and thermal analysis, to IR and Nuclear Magnetic Resonance spectroscopy, to Scanning Electron Microscopy, x-ray diffraction, computer modeling and more, the book provides first-hand explanations of modern methodsùcontributed by 24 leading scientists, many of whom actually developed or refined the techniques. The book includes many analytic techniques, applied to a wide range of organic, inorganic and composite materials and additives.Perfect for practitioners, students, and professional standards writers, the handbook is highly useful for scrutinizing materials in a variety of environments. It takes into account the many factors that affect the qualities of concreteùtemperature, pore and pore-size distribution, surface area, and exposureùgathering diverse evaluation methods into one convenient resource.
Author: Alvin Davis
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: C. H. Best
Publisher: ASTM International
ISBN: 9780803106123
Category : Technology & Engineering
Languages : en
Pages : 886
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Book Description
Author: Bernard Erlin
Publisher: ASTM International
ISBN: 0803114524
Category : Aggregates (Building materials)
Languages : en
Pages : 208
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Book Description
Fourteen papers from the Symposium on [title] held on June 26, 1989 in St. Louis cover approaches, examination, and specimen preparation of concrete and aggregates for petrographic studies; petrographic examination of aggregate problems; and petrography applied to solving varieties of concrete probl
Author: W. L. Frederick
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 39
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Book Description
Author: Ernest W. Flick
Publisher: William Andrew
ISBN: 081551185X
Category : Science
Languages : en
Pages : 995
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Book Description
Revised from the 1982 edition. The 1988 market for adhesives and sealants was estimated at $5.1 billion, with projections for 1995 at $12 billion. This handbook contains descriptions of some 2200 materials which are currently available to the industry. Arrangement is by category and then by company, the products being listed under the company name and described in the manufacturer's words. Annotation copyrighted by Book News, Inc., Portland, OR
Author: L. J. Minnick
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 14
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Book Description
Determination of the portland cement content of hardened concrete is often a matter of concern to engineers and chemists working with mortars and concretes. Unfortunately, a precise method of analysis has not been developed due to the many complexities of the material under test. Difficulties include the selection of representative samples, the presence of aggregate materials from unknown sources, the use of portland cements that differ substantially from an average composition, the presence of admixtures or additions (such as pozzolans or finely ground slag), the degree of hydration of the cement, the effect of carbonation as contrasted with hydration, and the effect of leaching of the concrete. In view of such formidable obstacles, chemical procedures demand that every effort should be made to obtain samples of the materials used in the concrete mixture. Where adequate information is obtained on the coarase and fine aggregate and cementing material, a reasonably accurate estimate of the cement content of hardened concrete can be made by chemical methods. In the absence of sufficient information on the source materials, assumptions must be made with respect to the amount of soluble substances that may be contributed to the analysis by the aggregate fractions and with respect to the ratio of aggregate materials present in the mixture. The assumptions affect the reliability of the test results. In some instances, the use of several schemes of analysis should be considered since the information derived from one method may assist in interpreting the results derived from an alternate method. This report outlines several methods that have been employed to determine the cement content of hardened concrete and indicates the reliability of the results that have been obtained, with emphasis being given to the procedure that is available as ASTM Test for Cement Content of Hardened Portland Cement Concrete (C 85). Results of cooperative tests undertaken by ASTM Committee C-9 to evaluate the reliability of the ASTM method of test are presented.
Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 958
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Book Description
