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ASTM International Committee D35 on Geosynthetics is currently developing a proposed new standard that covers the test procedure for evaluating the effectiveness of prefabricated vertical drains to enhance the consolidation of soils under specified conditions. The proposed standard, WK13402 , Test Method for Large Scale Consolidation Test for Prefabricated Vertical Drains, is under the…
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The increased use of geomembranes as barrier materials to restrict liquid migration from one location to another created a need for a test method to evaluate the quality of geomembrane seams produced by tape methods. ASTM International Committee D35 on Geosynthetics has met this need with the approval of the new standard D 7272 , Test Method for Determining the Integrity of Seams Used in Joining…
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ASTM International Committee E11 on Quality and Statistics has approved a new practice that describes methods for proficiency testing providers to use in analyzing laboratory results obtained in their programs. The standard, E 2489 , Practice for Statistical Analysis of One-Sample and Two-Sample Interlaboratory Proficiency Testing Programs, is under the jurisdiction of Subcommittee E11.20 on Test…
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ASTM International Committee D35 on Geosynthetics has developed a new standard that is an important step toward the improvement of filtration design for non-woven geotextiles. The standard, D 7178 , Practice for Determining the Number of Constrictions “, m, ” of Non-Woven Geotextiles as a Complementary Filtration Property, will provide engineers and researchers a common basis for accurate determination of an important products property. Practice D 7178 is under the jurisdiction of Subcommittee D35.03 on Permeability and Filtration. Practice D 7178 describes the procedure used along with existing test methods to determine the number of…
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A more efficient method to take asphalt pavement layer temperatures is the subject of a new standard developed by Subcommittee E17.41 on Pavement Management. The document, D 7228 , Test Method for Prediction of Asphalt-Bound Pavement Layer Temperatures, details surface temperature measurement and is based on temperature relationships in the Federal Highway Administration Long Term Pavement…
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Many state departments of transportation are collecting traffic data in real time and using it to manage traffic or provide travel information, as part of intelligent transportation systems. Some agencies save and archive this data after its initial real-time use and make it available to other data users, who often know little about how the data was collected or even what is contained in the data…
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A former military standard has become the basis for a new ASTM standard developed by Committee E11 on Quality and Statistics. The new standard, E 2234, Practice for Sampling a Stream of Product by Attributes Indexed by AQL, will be the first in a series based on a now-withdrawn set of military documents on sampling. Practice E 2234, presently under the jurisdiction of Subcommittee E11.10 on…
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ASTM Committee D35 on Geosynthetics will present a workshop on the possibility of creating a Geogrid Aperture Stability standard during the June Committee Week in Reno, Nev. The workshop will take place June 15 from 6:00 p.m. to 7:30 p.m. Steve Valero, Vice President - Technology, Tensar, will chair the workshop. Valero promises a productive and lively workshop that will be focused on educating…