Some Properties Of The Calcium Aluminoferrite Hydrates
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Some Properties Of The Calcium Aluminoferrite Hydrates
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Author : Elmer T. Carlson
language : en
Publisher:
Release Date : 1966
Some Properties Of The Calcium Aluminoferrite Hydrates written by Elmer T. Carlson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Calcium aluminate categories.
Calcium aluminoferrite hydrates in two series, 4CaO.(Al2O3FeO3).nH2O (hexagonal plates) and 3CaO.(Al2O3Fe2O3).6H2O (isometric), were prepared from the anhydrous aluminoferrites by hydration in the presence of Ca(OH)2. The hexgonal phase was stable below 15C, the isometric above 35C, in contact with solution. The end member, 2CaO.Fe2O3, did not produce an isometric hydrate, however. X-ray diffraction patterns of the hexagonal series in the 19H2O stage of hydration were indistinguishable from patterns of 4CaO.Al2O3.19H2O. After drying to the 13-hydrate stage, slight differences in the patterns were observed. The isometric series shows a definite shift in x-ray pattern with change in Fe2O3/Al2O3 ratio, the unit-cell edge increasing from 12.573 for 3CaO.Al2O3.6H2O to 12.716 for the member having Fe2O3/Al2O3 close to 5. DTA traces show endotherms near 100 and 200C representing the first dehydration stages of the isometric phase. The hexagonal hydrates are converted to the isometric during the course of the DTA run. The peak attributed to the isometric phase shifts from 323 to 290C going from the pure aluminate to the member riches in Fe2O3. All the aluminoferrite hydrates, both hexagonal and isometric, reacted with CaSOs solution to give products of the monosulfate and trisulfate (ettringite) types, the latter predominating at later stages. The rate of reaction decreased with increasing Fe2O3 content. (Author).
Some Properties Of The Calcium Aluminoferrite Hydrates
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Author : Elmer T. Carlson
language : en
Publisher:
Release Date : 1966
Some Properties Of The Calcium Aluminoferrite Hydrates written by Elmer T. Carlson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Alumina cement categories.
Building Science Series
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Author :
language : en
Publisher:
Release Date : 1970-04
Building Science Series written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970-04 with Building materials categories.
Proceedings Of Technical Meeting Concerning Wind Loads On Buildings And Structures
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Author : Richard D. Marshall
language : en
Publisher:
Release Date : 1970
Proceedings Of Technical Meeting Concerning Wind Loads On Buildings And Structures written by Richard D. Marshall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Architecture categories.
Exploratory Studies Of Early Strength Development In Portland Cement Pastes And Mortars
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Author : Raymond Leonard Blaine
language : en
Publisher:
Release Date : 1970
Exploratory Studies Of Early Strength Development In Portland Cement Pastes And Mortars written by Raymond Leonard Blaine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Portland cement categories.
Proceedings
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Author : Richard D. Marshall
language : en
Publisher:
Release Date : 1970
Proceedings written by Richard D. Marshall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Architecture categories.
1964 Exposure Test Of Porcelain Enamels On Aluminum
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Author : Margaret A. Baker
language : en
Publisher:
Release Date : 1970
1964 Exposure Test Of Porcelain Enamels On Aluminum written by Margaret A. Baker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Enamel and enameling categories.
An exposure test of porcelain enamels on aluminum was initiated by the National Bureau of Standards and the Porcelain Enamel Institute in 1964.The enamels were returned from the exposure sites to the laboratory at NBS to be measured for changes in gloss and col * or after exposures of six months, one year, and three years.Changes were found to be greatest at Kure Beach and least at Montreal and Los Angeles, with moderate changes occurring at Washington and New York.Although the boiling citric acid test is used as an acceptance test for these enamels, the correlation with color change, particularly at Kure Beach, was not as good as expected.A cupric chloride test was developed which shows an improvement in this correlation.(Author).
Radiation Errors In Air Ducts Under Nonisothermal Conditions Using Thermocouples Thermistors And A Resistance Thermometer
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Author : Joseph C. Davis
language : en
Publisher:
Release Date : 1969
Radiation Errors In Air Ducts Under Nonisothermal Conditions Using Thermocouples Thermistors And A Resistance Thermometer written by Joseph C. Davis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Air ducts categories.
Studies were made to determine the radiation error in temperature measurements made with thermocouples, thermistors, and a resistance thermometer in moving air at velocities ranging from 300 to 1300 fpm when the temperature of the duct wall surrounding the air stream was from 0 to 50 deg F higher than that of the air in the center of the duct. To eliminate all but the variable under study, conduction errors were minimized to a point where they were almost nonexistent by using Chromel P-constantan thermocouple wire and by employing other techniques. Radiation effects were studied when the probe housing the three types of temperature sensors was unshielded and again when it was shielded. Under the test conditions that prevail in the testing of air conditioners and heat pumps in laboratories, it should be possible to reduce the error in temperature measurement of the moving air to about 0.2 deg F by a suitable combination of air mixers, duct insulation, radiation shields, and calibration techniques. (Author).
Building Science Series
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Author : Henry E. Robinson
language : en
Publisher:
Release Date : 1970
Building Science Series written by Henry E. Robinson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Building categories.
Building Science Series
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1970
Building Science Series written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Building categories.