2 edition of viscosities of roofing asphalts at application temperatures found in the catalog.
viscosities of roofing asphalts at application temperatures
Walter J. Rossiter
by Dept. of Commerce, National Bureau of Standards, Institute for Applied Technology, Center for Building Technology : for sale by the Supt. of Docs., U.S. Govt. Print. Off. in Washington
Written in English
|Statement||Walter J. Rossiter, Jr., and Robert G. Mathey : Center for Building Technology.|
|Series||NBS building science series : 92, Building science series -- 92.|
|Contributions||Mathey, Robert G., Center for Building Technology., United States. Naval Facilities Engineering Command., United States. Air Force. Directorate of Civil Engineering., United States. Army. Corps of Engineers.|
|The Physical Object|
|Pagination||iii, 16,  p. :|
|Number of Pages||16|
BUILT-UP ASPHALT ROOFING - SECTION PART 1 GENERAL. SECTION INCLUDES. B. Use only UNITED ASPHALTS no-smell asphalt. Asphalt shall contain % oxidized asphalt flux and cannot contain ( kg/sm) of roof area. D. Application temperature of the asphalt shall be at the Equiviscous Temperature (EVT) with a tolerance of +/- This test method is used to measure the apparent viscosity of asphalts at handling, mixing, or application temperatures. Some asphalts may exhibit non-Newtonian behavior under the conditions of this test method, or at temperatures within the range of this test method.
losing the beneficial light oils that help the roofing system weather and stay waterproof. Since asphalts are thermoplastic, their viscosity varies with temperature. Application temperature must be in the range which will permit an adequate film of asphalt, whether applied by mop or machine. The JM Technical Center, in conjunction with. ASTM viscosity tables for kinematic viscosity conversions and viscosity index calculations. (Philadelphia, ), by American Society for Testing Materials (page images at HathiTrust) Viscosity and density of over 40 lubricating fluids of known composition at pressures to , psi and temperatures to F; (New York, ), by American Society of Mechanical Engineers.
This type of roof consists of asphalt, reinforcement and aggregate which is used to protect the asphalt from ultraviolet rays. All materials have their weaknesses and asphalt is no exception. A good asphalt (e.g., low asphaltene content) must be used to ensure the quality and low-temperature performance of roofing asphalts. At application rates of 3/ gallons per ft(2), a cold applied roofing membrane system with one or more plys of inorganic reinforcing fabrics such as fibre glass ply sheets, polyester fabrics, and/or fibre glass/polyester woven or non woven mesh or combination thereof was constructed.
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Get this from a library. The viscosities of roofing asphalts at application temperatures. [Walter J Rossiter, Jr.; Robert G Mathey; Center for Building Technology. The viscosities of roofing asphalts at application temperatures / By Jr.
Walter J. Rossiter, Robert G. Mathey, Center for Building Technology. and United States. National Bureau of Standards. roofing system weather and stay waterproof.
Since asphalts are thermoplastic, their viscosity varies with temperature. Application temperature must be in the range which will permit an adequate film of asphalt, whether applied by mop or machine.
The JM Technical Center, in conjunction with the National Roofing Contractors. This apparatus, which is illustrated in Figure I, facing, was used to measure viscosities over the temperature range from 10 to 55°C (50 to °F).
In the operation of this viscometer a film of asphalt from 25 to 50 microns thick is placed between 2 by 3 em glass plates. The softening point of asphalt and the application point temperatures are tabulated here. Application Temperature for Roofing Asphalts (7) Softening Point, °F Application Temperature, °F Asphalt should be applied at the equiviscous temperature (EVT) which has been established for that asphalt and less than the blowing hankins-farms.com: Herbert W.
Busching. May 10, · When roof systems are installed at temperatures below 50°F, store all materials in a dry, heated area for a minimum of 24 hours prior to installation. All rolls should be maintained at a minimum temperature of 50°F up to the time of application.
This allows the modified bitumen to. If you need a new roof on your home or office, you have many choices of roofing materials, including roll roofing, shingles and shakes. No matter which type of roofing material you install, the roofing process will go the most smoothly if you install roofing in the proper temperature.
Nov 20, · Air, base and asphalt mat temperatures can be the key to successful compaction and building a reputation for laying down high-quality, long-lasting paving or patching job. Heed the specific cold weather application procedures in this manual. Always start application at the low edge of the roof per the individual specification diagram.
Never mop ahead of the modified bitumen rolls more than 6' ( m) and, in temperatures below 50°F (10°C), no more than 4' ( m). Strip Shingles. Also known as 3-tab shingles (due to the cut of the shingle) or simply strips, strip shingles are the original and most basic asphalt shingles.
They are made from a single layer of asphalt and have a very flat appearance that typically offers a slate look. Depending on the geographical area in which it is used, an asphalt roofing material could experience temperatures as high as 80°C (°F).
For roofing asphalt, resistance to flow has been most often characterized through the use of the softening point test – usually the Ring & Ball Softening Point test (ASTM.
rate and application temperature involved in these studies, it is obvious why there is an abundance of data and a series of grades of asphalts at seven different temperatures and a shear rate range from 0 to 10 s The characteris- tics of the asphalts studied are given in table 2 taken Rheograms for asphalt from single viscosity.
cous Temperature (EVT) of roofing asphalt in the United States be changed to 75 centipoise. The following definition is recommended: “The Equiviscous Temperature (EVT) range of roofing asphalts is the recommended temperature at which the viscosity of asphalt is 75 centipoise plus or minus 25 F at the mop cart or felt layer immediately.
In the present work, a procedure is outlined for the determination of temperature for mixing aggregates with polymer-modified asphalts using a thermoplastic -modified asphalt (Novophalt) and a.
Because viscosity and thickness of the asphalt would be difficult to measure on the roof, manufacturers were asked to provide the temperature at which the specific BURA is at the target viscosities for mopping and mechanical application viscosities.
This parameter is called the Equiviscous Temperature or EVT. C.G. Cash, in Encyclopedia of Materials: Science and Technology, Asphalt Built-up Roofing. Asphalt membranes using glass fiber felts are the most popular of the built-up roofs; they have largely replaced their cousins made with organic felts.
Properly applied, asphalt–glass built-up roofs are in the class of low-sloped roofs, with the longest service life. The viscosity-temperature chart covered by this standard is a convenient means of plotting data for estimating the viscosity of asphalt binders at any temperature within a limited range.
Conversely, the chart may be used to ascertain the temperature at which a desired viscosity is attained. The kinematic viscosity of a liquid is the absolute (or dynamic) viscosity divided by the density of the liquid at the temperature of measurement.
The ° C ( ° F) measurement temperature was chosen to simulate the mixing and laydown temperatures typically encountered in HMA pavement construction. "This new edition reflects many of the very significant advances which have taken place in the period since the last edition was published.
I am confident that you will feel that this is a worthy addition to your asphalt book shelf." Robert Hunter This respected Handbook has earned its reputation as the authoritative source of information on bitumens used in road pavements and other surfacing 3/5(4).
Unlike conventional roofing or waterproofing asphalts, the hot, modified asphalts must be carefully heated and agitated in special oil-jacketed kettles. Temperatures in excess of degrees F. ( degrees C.) will cause severe damage to the asphalt-polymer matrix and coking will result.
Hot spots from the conventional roofing kettles heat ’. This document describes most of the factors which determine the life expectancy of an asphalt shingle roof - "roofing shingle wear factors". These wear factors affect most asphalt roof shingle types, whether organic felt based or fiberglass fabric based, and whether the shingle type is "cutout" or three-tab, strip-type, or a laminate-type roof shingle.adhesion aggregate amount anthracene application aromatic asphalt ASTM benzene binder bituminous blends by-product carbon cathodic protection cent Chem chemical coal tar coatings coal tar enamels coal tar pitch coal-digestion coal-tar coke ovens cold-applied composition compounds concrete construction containing continuous distillation.Temperatures of asphalt shingles: this article describes the different temperatures involved in asphalt roofing product manufacture and compares that to the on-roof temperatures to which asphalt shingles are exposed when in-service.
We include the properties of asphalt such as its melting point and flash point, and we describe the properties of asphalt used in the manufacture of roof shingles.