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Silver-, nickel- and tin-coated flat conductors are currently used in a variety of electronic applications, including computer, and in the military and commercial aerospace industries. Despite this use, flat conductors made of these materials are not covered by established standards. ASTM International Committee B01 on Electrical Conductors is now developing the following three standards to cover…, ASTM Committee B01 Next Meeting: , April 21, 2010 , April Committee Week, St. Louis, Mo., Technical Contact:, Stephen Childers, IWG High Performance Conductors Inc., Inman, S.C., Phone: 864-472-9694; stephen.childers@iwghpc.com, ASTM Staff Contact:, Jennifer Rodgers, Phone: 610-832-9694; jrodgers@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8442/Dec2009
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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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ASTM International Committee B01 on Electrical Conductors has approved a new standard for tin-coated annealed copper wire. The standard, B965 , Specification for High Performance Tin-Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability, was developed by Subcommittee B01.04 on Conductors of Copper and Copper Alloys . Stephen Childers, process engineer,…
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The main purpose of any grounding product is to provide a low-resistance path for fault currents to follow to the ground, which will ultimately protect the integrity of the power system and maintain a safe operating environment. ASTM International Committee B01 on Electrical Conductors is developing a proposed new standard to annealed concentric-lay-stranded copper-clad steel conductors. While…
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A new ASTM International standard, ASTM D7447 , Practice for Symbolizing Adhesive Applications, provides a convenient way for engineers to represent adhesives on a computer-aided design drawing. The standard, a collaborative effort between ASTM and the Adhesive and Sealant Council, is under the jurisdiction of Subcommittee D14.60 on Adhesive Material Classification System, which is part of ASTM…
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Two new ASTM International standards for steel core wire will be useful in providing transmission cable that will make the most of the existing infrastructure in gaining electrical transmission efficiency. “The products in these standards allow electrical utilities and transmission cable designers more flexibility to increase electrical transmission capacity with minimal investments,” says Dale…
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All interested parties are encouraged to participate in the development of a proposed new ASTM International standard, WK20460 , Specification for High Performance Tinned Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability. The proposed standard is being developed by Subcommittee B01.04 on Conductors of Copper and Copper Alloys, which is part of ASTM…
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A recently approved revision to ASTM International standard C 150 , Specification for Portland Cement, includes three significant technical changes to the document. The changes are part of a joint effort between ASTM and the American Association of State and Highway and Transportation Officials to harmonize C 150 with AASHTO’s standard, M 85, Specification for Portland Cement. C 150 is under the…
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A series of focus groups conducted by the Adhesive and Sealant Council, Inc., has led to the ongoing development of a proposed new standard, WK14701 , New Symbols for Adhesive Applications. WK14701 is being developed by Subcommittee D14.04 on Terminology, part of ASTM International Committee D14 on Adhesives. According to Lawrence D. Sloan, president, Adhesive and Sealant Council, and D14.04…
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All interested parties are invited to contribute to the ongoing development of WK11541 , Specification for Structural Insulated Panel (SIP) Adhesives for Bonding Oriented Strand Board (OSB) Facers to Rigid Cellular Polystyrene Thermal Insulation Core Materials. The proposed standard is under the jurisdiction of Subcommittee D14.70 on Construction Adhesives, which is part of ASTM International…