Download or read book Interrelations Between Cement and Concrete Properties Sulfate expansion heat of hydration and autoclave expansion written by Raymond Leonard Blaine and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interrelations Between Cement and Concrete Properties written by Raymond Leonard Blaine and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interrelations Between Cement Concrete Properties written by Benjamin Leonard Bean and published by . This book was released on 1969 with total page 342 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 1969-06 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Performance Characteristics for Sanitary Plumbing Fixtures written by Institute for Applied Technology (U.S.). Building Research Division and published by . This book was released on 1970 with total page 84 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 822 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 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 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 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 1964 Exposure Test of Porcelain Enamels on Aluminum written by Margaret A. Baker and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book NBS Special Publication written by and published by . This book was released on 1967 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1967 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Highlights of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1967 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fire Resistance of Steel Deck Floor Assemblies written by Harry Shoub and published by . This book was released on 1967 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted to determine the resistance to fire of welded steel plate and beam floor assemblies with various conditions of floor covering on the plates, and ceiling protections beneath the beams. The trials included fire exposures from the burnout of combustible materials ranging from 10 to 40 lb/sq ft on the floor surface as well as standard fire endurance tests in which the ceiling of the structure was exposed to fire. The results of the tests indicated that the use of steel floor structures was practical from considerations of fire safety. For the test conditions established, fire exposure on top of the floor did not heat the structural steel supporting members sufficiently to cause load failure or collapse, and did not produce untenable conditions in the room below. In tests involving fire exposure to the underside of floors, the fire endurance times, based solely on heat transmission criteria, ranged from 1 hr 24 min to over 4 hr. Temperature levels attained by the structural members and deflection of the floor assemblies are also reported. (Author).