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ASTM International Committee D35 on Geosynthetics invites all interested parties to participate in the development of a proposed new standard, WK15082 , Specification for Measuring the Asperity Height of Textured Geomembrane. The proposed standard is being developed by Subcommittee D35.10 on Geomembranes. Although asperity height is specified throughout the geosynthetic industry, a procedure to…
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Two proposed new standards currently being developed by ASTM International Committee F23 on Protective Clothing will each contribute to the safety of protective clothing. Interested parties are invited to participate in the development of both proposed standards, which are WK14247 , Specification for Air-Fed Protective Ensembles and WK14442 , Antimicrobial Activity of Textiles Following Multiple…, WK14247, Specification for Air-Fed Protective Ensembles, Subcommittee F23.30 on Chemicals invites users and manufacturers of air-fed protective ensembles to participate in the development of a proposed new standard WK14247 . This proposed specification would establish design, performance, documentation, labeling and certification requirements for protective ensembles that rely on principal air supply to the wearer via an air line or air filtered…, WK14442, Antimicrobial Activity of Textiles Following Launderings with Bleach, Antimicrobial treatments often are applied to textiles to impart durable efficacy, reducing the survival and growth of microorganisms on the textile. A proposed new ASTM standard, WK14442 , under the jurisdiction of F23’s biological subcommittee, F23.40 , would ensure these antimicrobial agents would continue to work throughout a garment’s life span. “Over the last 10 years, the industry has…
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Three subcommittees of ASTM International Committee D35 on Geosynthetics are currently developing several proposed new standards. The topics covered in the following proposed standards are geosynthetic clay liners, geomembranes, and the development of a mechanistic-empirical design guide for pavements. Committee D35 will meet Jan. 30-Feb. 1, 2008, at the January Committee Week in Tampa, Fla.…, Subcommittee D35.04 on Geosynthetic Clay Liners, Responding to shrinkage issues involving geosynthetic clay liners, Subcommittee D35.04 has launched work on a proposed new standard, WK12239 , Test Method for Linear Dimensional Changes of Restrained Geosynthetic Clay Liners Under Cyclic Temperature and Hydration Conditions. WK12239 is an index test that covers the measurement of changes in linear dimensions of a geosynthetic clay liner that…, Subcommittee D35.10 on Geomembranes, Subcommittee D35.10 is currently developing two proposed new standards, WK14305 , Specification for Non-Reinforced PVC (Polyvinyl Chloride) Geomembrane Seams, and WK14311 , Guide for the Installation of Non-Reinforced Polyvinyl Chloride (PVC) Geomembranes. According to Mark Wolschon, engineers, specification writers, users, suppliers, manufacturers, fabricators and installers of PVC…, Subcommittee D35.01 on Mechanical Properties, There is currently a national movement to develop a mechanistic-empirical design guide for pavements. This initiative requires that the fundamental material properties for all components of the design be quantified. Subcommittee D35.01 is working toward this goal with the development of two proposed new standards, WK14361 , Test Method for Determining Small-Strain Tensile Properties of Geogrids…
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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 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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ASTM International Committee F23 on Personal Protective Clothing and Equipment has developed a new standard in response to a United States Food and Drug Administration ruling to change how the marketing of surgical gowns is regulated. The new standard, F 2407 , Specification for Surgical Gowns Intended for Use in Healthcare Facilities, is under the jurisdiction F23’s biological subcommittee, F23.…
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ASTM International Committee F16 on Fasteners has recently approved an important new standard that deals with coated threaded fasteners and washers by hot-dip zinc galvanizing. The standard, F 2329, Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts and Special Threaded Fasteners, is under the jurisdiction of Subcommittee…
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A new publication about the performance of protective clothing is now available from ASTM International. STP 1462, Performance of Protective Clothing: Global Needs and Emerging Markets, 8th Symposium , includes 19 peer-reviewed papers that address topics related to the performance of protective clothing for government and industrial workers, first responders, and civilians. A vital resource for…
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Fostering government support for ASTM International Committee F23 on Protective Clothing and other standards developing committees related to protective clothing is the central goal of a new memorandum of understanding recently signed by ASTM International and the National Institute for Occupational Health and Safety. The agreement highlights the role of the NIOSH National Personal Protective…