Download or read book Some Properties of the Calcium Aluminoferrite Hydrates written by Elmer T. Carlson and published by . This book was released on 1966 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Some Properties of the Calcium Aluminoferrite Hydrates written by Elmer T. Carlson and published by . This book was released on 1966 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of Technical Meeting Concerning Wind Loads on Buildings and Structures written by Richard D. Marshall and published by . This book was released on 1970 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building Science Series written by and published by . This book was released on 1970-07 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building Science Series written by United States. National Bureau of Standards and published by . This book was released on 1970 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Richard D. Marshall and published by . This book was released on 1970 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical News Bulletin written by and published by . This book was released on 1966 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dimensions written by and published by . This book was released on 1965 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical News Bulletin written by United States. National Bureau of Standards and published by . This book was released on 1966 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Henry E. Robinson and published by . This book was released on 1970 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Errors in Air Ducts Under Nonisothermal Conditions Using Thermocouples Thermistors and a Resistance Thermometer written by Joseph C. Davis and published by . This book was released on 1969 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Building Science Series written by Henry E. Robinson and published by . This book was released on 1970 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smoke and Gases Produced by Burning Aircraft Interior Materials written by Institute for Applied Technology (U.S.). Building Research Division and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Variables Involved in the Saturating of Roofing Felts written by Sidney H. Greenfeld and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt written by Sidney H. Greenfeld and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixteen years of outdoor weathering of laboratory-prepared smooth-surface and mineral-surfaced, felt-base roofing specimens has provided information on the effects of mineral additives on the durability of coating-grade roofing asphalts. Six finely divided mineral additives (blue black slate, clay, dolomite, fly ash, mica, and silica) were evaluated at concentrations up to 60 percent in California, Mid Continent and Venezuela asphalts. The mineral-surfaced specimens are all performing satisfactorily, and show only minor degrees of degradation. Of the smooth-surfaced specimens, the Mid-Continent asphalt performed the best and the California asphalt the poorest. The mica and blue black slate increased the durabilities of all three asphalts at all concentrations and two coating thicknesses. Fly ash, clay, dolomite, and silica were beneficial in some combinations, but had little effect in others. In general, these early results from outdoor exposure tend to corroborate the results obtained on these coatings exposed in weatherometers. (Author).
Download or read book Strength of Masonry Walls Under Compressive and Transverse Loads written by Felix Y. Yokel and published by . This book was released on 1971 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ninety walls of 10 different types of masonry construction were tested under various combinations of vertical and transverse load. It is shown that the effect of vertical load and wall slenderness on transverse strength can be predicted by rational analysis. The analysis is based on established theory which has been extended to account for the properties of masonry. Similar methods of rational analysis have been adopted for the design of steel structures and are presently being considered for reinforced concrete structures.
Download or read book Compressive Strength of Slender Concrete Masonry Walls written by Felix Y. Yokel and published by . This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
