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Zeta potential provides a guide to the stability of solid or liquid particles in a liquid system, such as intravenous foods. A new ASTM International standard focuses on the zeta potential in systems containing biological material such as proteins, DNA, liposomes and other organic materials. The new standard, ASTM E2865 , Guide for Measurement of Electrophoretic Mobility and Zeta Potential of…, ASTM Committee E56 Next Meeting:, Nov. 12-13, November Committee Week, Atlanta Ga., Technical Contact:, Alan Rawle, Ph.D, Malvern Instruments Inc., Westborough, Mass., Phone: 508-768-6434; alan.rawle@malvern.com, ASTM Staff Contact:, Kathleen McClung, Phone: 610-832-9717; kmcclung@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org R elease #9317
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Current members of ASTM International Committees C01 on Cement and C09 on Concrete and Concrete Aggregates , and other interested parties, are invited to join a new C01 subcommittee, C01.98 on Sustainability Assessment. The scope of C01.98 is to support the development and maintenance of standards related to methodologies and metrics for assessing sustainability in the manufacture and use of…
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A new ASTM International practice provides a standard for preparing a mixture of cement paste that will simulate the shearing experienced by the cement paste in concrete. The new standard, ASTM C1738 , Practice for High-Shear Mixing of Hydraulic Cement Pastes, was developed by Subcommittee C01.22 on Workability , part of ASTM International Committee C01 on Cement . According to Chiara Ferraris,…
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ASTM International Committee E56 on Nanotechnology has created a new subcommittee, E56.06 on Nano-Enabled Consumer Products. The scope of E56.06 is to develop scientifically credible standards for identification, evaluation and assessment of engineered nanomaterials in consumer products. Members of E56.06 will develop standards for determining the presence of engineered nanomaterials in consumer…, ASTM Committee E56 Next Meeting:, Nov 15-16, November Committee Week, San Antonio, Texas, Technical Contact:, (Chairman, E56) Debbie Kaiser, National Institute of Standards and Technology, Gaithersburg, Md., Phone: 301-975-6759; debra.kaiser@nist.gov ; (Subcommittee E56.06) Aleks Stefaniak, National Institute for Occupational Safety and Health, Morgantown, W.Va., Phone: 304-285-6302; boq9@cdc.gov, ASTM Staff Contact:, Timothy Brooke, Phone: 610-832-9729; tbrooke@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8698/Sept2010
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X-ray diffraction has become a popular means of residual stress measurement in the aerospace materials field over the last 50 years. A proposed new guide being developed by ASTM International Committee E28 on Mechanical Testing will provide the necessary information to obtain the most reliable residual stress values as well as identify and evaluate potential errors in measurement, paving the way…
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Rapid hardening hydraulic cements are used in a variety of applications in which reduced cementitious contents are desired or early service is needed. Included among these applications are paving, construction, stucco, mortar and block. A newly approved ASTM International standard covering these cements, ASTM C1600/C1600M , Specification for Rapid Hardening Hydraulic Cement, has been developed by…, Type URH, —ultra rapid hardening, for use where ultra high early strength is desired;, Type VRH, —very rapid hardening, for use where very high early strength is desired;, Type MRH, —medium rapid hardening, for use where mid-range rapid hardening, high early strength is desired; and, Type GRH, —general rapid hardening, for use when the higher strength properties of Type VRH or a Type MRH cement is not required. “ASTM C1600 lists minimum requirements for compressive strength, setting time, shrinkage and soundness (autoclave expansion),” says Hicks. “Optional specifications for sulfate expansion, alkali silicate reactions with aggregates, heat of hydration and expansion in water are also…
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A revision to an important ASTM nanotechnology standard incorporates a large-scale interlaboratory study that took place in 2008. The revised standard, ASTM E2490 , Guide for Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS), is under the jurisdiction of Subcommittee E56.02 on Characterization: Physical, Chemical and Toxicological…
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Engineers and researchers who have specialized Charpy testing needs will be the primary users of two new standards recently approved by ASTM International Committee E28 on Mechanical Testing. The new standards, E2248 , Test Method for Impact Testing of Miniaturized Charpy V-Notch Specimens, and E2298 , Test Method for Instrumented Impact Testing of Metallic Materials, were developed by…
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A workshop on the role of standards in the emerging field of nanotechnology will be held Oct. 8-9, 2008, at the National Institute of Standards and Technology near Washington, D.C. The workshop, "Enabling Standards for Nanomaterial Characterization," is being co-sponsored by the National Cancer Institute's Nanotechnology Characterization Laboratory, the National Institute of Standards and…
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Working toward a standard practice for torque calibration that would reduce laboratory inconsistencies and uncertainties has led to the approval of a new ASTM International standard, E2428 , Practice for Calibration of Torque-Measuring Instruments for Verifying the Torque Indication of Torque Testing Materials. The new standard was developed by Subcommittee E28.01 on Calibration of Mechanical…