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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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ASTM International Committee E56 on Nanotechnology has approved its first standard, E 2456 , Terminology for Nanotechnology. The new standard is under the jurisdiction of Subcommittee E56.01 on Terminology and Nomenclature. Because of the great need for a terminology document that is globally recognized and because of the cooperation of several organizations in making the document a reality,…
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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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X-ray fluorescence spectrometry is used often to determine a wide range of elements in alloys. The technique provides rapid, accurate, and precise multi-element analysis that enables efficient melt process control. It is also widely used for certification and over-check analysis of product. Although x-ray fluorescence has become a widely used technique of analysis by the nickel alloy industry,…
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Although ASTM International Committee E56 on Nanotechnology was just established this year, it has already begun an ambitious program of developing new standards. Committee E56 is currently developing the following proposed standards, which deal with environmental safety issues, hemolytic properties and particle size measurement. Interested parties are invited to participate in the development of…, WK8985, Guide for Handling Unbound Engineered Nanoparticles in Occupational Settings, Academic, government and industrial laboratories are currently performing nanotechnology research and development and the scope and breadth of this work is expected to grow dramatically. Manufacturing processes involving nanomaterials have begun and commercially available nano-based products have been introduced. All of this activity in the nanotechnology realm has created the need for the…, WK8997, Practice for Analysis of Hemolytic Properties of Nanoparticles, Subcommittee E56.02 on Characterization has begun working on proposed new standard WK8997, Practice for Analysis of Hemolytic Properties of Nanoparticles. This proposed standard would provide a suitable procedure for establishing the safety of nanoparticulate materials that will be used in vivo , such as nanoparticles for therapeutics and diagnostics. "Nanotechnology products will be used in…, For further technical information, contact Scott McNeil, director, Nanotechnology Characterization Laboratory, Frederick, Md. (phone: 301/846-6939; mcneils@ncifcrf.gov )., WK8705, Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS), Subcommittee E56.02 was formed to answer questions regarding characterization, such as size and shape of materials. Another proposed new standard under the jurisdiction of Subcommittee E56.02 is WK8705, Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS), which deals with the vital issue of size characterization. The purpose of the…
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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…
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Open Meetings and One-Day Workshop in May, The National Institute of Advanced Industrial Science and Technology (AIST) in Japan has become the latest organization to sign a partnership agreement with ASTM International to develop a terminology standard for nanotechnology. AIST is an Independent Administrative Institution (IAI) in association with the Japanese Ministry of Economy, Trade and Industry (METI). AIST represents an amalgamation…, Partnerships Prove Beneficial, An early priority for the recently formed ASTM International Committee E56 on Nanotechnology is the development of a globally relevant, industry-driven terminology standard. In an effort to facilitate this objective, ASTM International has signed partnership agreements with the Institute of Electrical & Electronics Engineers (IEEE), the American Society of Mechanical Engineers (ASME), NSF…, Attendance Encouraged at Open Meetings and Workshop, Interested individuals are encouraged to attend the next meeting of Committee E56, which will take place May 16-18, 2005, in Reno, Nev., at the Hilton Reno Resort. Following the meetings, on May 19, at the same hotel, Committee E56 will cosponsor a Workshop on Characterization of Nanomaterials for Medical and Health Applications. The workshop will provide a structured venue to address critical…
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ASTM International, one of the largest voluntary standards development organizations in the world, announced the formation of a new committee to develop international consensus standards, definitions, terminology, and procedures covering nanotechnology. A branch of science and engineering that deals with things smaller than 100 nanometers (1 nm equals one-billionth of a meter), nanotechnology may…, An early priority for Committee E56 is the development of a globally relevant, industry-driven terminology standard for nanotechnology. In an effort to facilitate this objective, ASTM has signed partnership agreements with the Institute of Electrical & Electronics Engineers (IEEE), the American Society of Mechanical Engineers (ASME), and NSF International. These agreements focus solely on the…