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The need for a standard test method that would allow the determination of the complex shear modulus of bituminous mixtures using relatively inexpensive laboratory equipment has led to the development of a new ASTM International standard, ASTM D7552 , Test Method for Determining the Complex Shear Modulus (G*) of Bituminous Mixtures Using Dynamic Shear Rheometer. According to Gerald Reinke,…, ASTM Committee D04 Next Meeting:, June 8-10, June committee week, St. Louis, Mo. Technical Contact: Gerald Reinke, MTE Services Inc., Phone: 608-779-6304; greinke@mathy.com ASTM Staff Contact: Daniel Smith, Phone: 610-832-9727; dsmith@astm.org ASTM PR Contact: Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8457/Jan2010
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More frequent worldwide use of asphalt-rubber binders in road building has increased the need for rotational viscotesters, which are used to ensure proper quality control and assurance. While an appropriate standard for viscotesters does not currently exist, a proposed new ASTM standard will answer this need. The proposed standard, WK25108 , Test Method for Measurement of Apparent Viscosity of…
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Test for Solubility of Asphalt Materials in n-Propyl Bromide A new ASTM International standard on solubility of asphalt will provide an alternative for a solvent that has been banned as an ozone depleter by the Kyoto Protocol, an international environmental treaty with the goal of stabilizing greenhouse gas concentrations that may help minimize global warming. The new standard, ASTM D7553 , Test…
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Determining and potentially reducing the amount of energy expended by vacuum cleaners is the purpose of a proposed new ASTM international standard, WK21491 , Test Method For Determining Energy Consumption of Vacuum Cleaners Relative to Cleaning. The proposed standard is being developed by Task Group F11.20.04 On Energy Usage And Performance, under the jurisdiction of Subcommittee F11.20 on…
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Many factors, such as traffic, drainage, structure and climatic variations, impact the field performance of asphalt concrete. However, asphalt concrete performance has been more accurately predicted when laboratory material properties are known, so ASTM International Committee D04 on Road and Paving Materials has approved a new standard, ASTM D7460 , Test Method for Determining Fatigue Failure of…
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Current methods for determining bulk specific gravity of aggregate are often time-consuming and not ideal for quality control checks during construction. However, a new ASTM International standard provides a fast method for determining the consistency of aggregate properties that are used in asphalt and concrete mixtures. Committee D04 on Road and Paving Materials has approved ASTM D7370…
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A growing need to recycle millions of tires discarded annually is the impetus for the continued development of a proposed new ASTM International specification that provides standards for converting tires into an asphalt product. WK20240 , Specification for Performance Graded Tire Rubber-Modified Asphalt Binder is being developed by Subcommittee D04.40 on Asphalt Specifications, under the…
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ASTM International Committee F11 on Vacuum Cleaners invites all interested parties to participate in a virtual meeting regarding a new standards developing activity on vacuum cleaner energy measurements. The meeting will be held June 25 at 10:00 a.m. EDT. Through this activity, Committee F11 plans to develop a standard or set of standards that will aid in increasing the energy efficiency of…
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A new ruling by the Federal Railroad Administration cites an ASTM standard as a means of making emergency exits from trains more visible to emergency personnel. The standard cited, D 4956 , Specification for Retroreflective Sheeting for Traffic Control, is under the jurisdiction of Subcommittee D04.38 on Highway Traffic Control Materials, part of ASTM International Committee D04 on Road and…
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Particulate matter emitted during the use of a vacuum cleaner is a significant area of concern that ASTM International Committee F11 on Vacuum Cleaners has dealt with by developing and approving F 2608 , Test Method for Determining the Change in Room Air Particulate Counts as a Result of the Vacuum Cleaning Process. Now, the committee is developing a proposed new standard that addresses the final…