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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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Side curtain airbags are usually mounted in the roof of a vehicle and burst through the headliner to cover the side window area in the event of a side impact or rollover accident. ASTM International Committee D13 on Textiles is currently developing a proposed new standard for the testing of such side curtain airbags, WK23227 , Test Method for Determining Pressure Decay of Inflatable Restraint…
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Producers of fluorocarbons are invited to join in the ongoing standards developing activities of ASTM International Committee D26 on Halogenated Organic Solvents and Fire Extinguishing Agents. The committee has recently approved a new standard, ASTM D7509 , Specification for Fluorocarbon Feedstock Grade Chloroform, under the jurisdiction of Subcommittee D26.08 on Halogenated Organics Used as…
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Subcommittee D13.58 on Yarns and Fibers, part of ASTM International Committee D13 on Textiles, is currently working on a proposed new standard, WK18377 , Specification for Polyolefin Chopped Strands for Use in Concrete. WK18377 will include test methods used to measure the attributes required for the intended use of the proposed standard. Primarily, the proposed standard will provide…
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Finding ways to assure the quality and safe handling of fire extinguishing agents has led to the development of two new ASTM International standards, D 7323 , Practice for Handling, Transportation and Storage of IG-100 (Nitrogen), and D 7325 , Practice for Handling, Transportation and Storage of IG-541, N2, Ar, CO2. The new standards were developed by Subcommittee D26.09 on Fire Extinguishing…
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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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Providing users with an assurance of quality and ensuring the safe handling, transport and storage of fire extinguishing agents are the purposes of a new ASTM International standard, D 7327 , Specification for HFC Blend B (CH2FCF3, CHF2CF3 and CO2). The new standard was developed by Subcommittee D26.09 on Fire Extinguishing Agents, which is part of ASTM International Committee D26 on Halogenated…
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Subcommittee D26.09 on Fire Extinguishing Agents is dedicated to developing standards that provide end users with an assurance of quality in fire extinguishing agents, as well as to ensure the safe handling, transport and storage of such agents. The subcommittee, which is under the jurisdiction of ASTM International Committee D26 on Halogenated Organic Solvents and Fire Extinguishing Agents, is…
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The ASTM International Proficiency Testing Center is expanding the Textiles Proficiency Testing Program (PTP) scope of testing to include ASTM D5587. Beginning in February 2006, the ASTM International PTP on Textiles will include ASTM D5587, Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure. The test method covers the measurement of the tearing strength of textile…
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After a 35-year-absence, the natural cement industry is being revived and, along with it, a long-withdrawn ASTM International standard. Until it closed in 1970, the Century Cement Company in Rosendale, N.Y. was the last company to manufacture natural cement. Up to that point, Rosendale had been the center of the industry, the source of more than half of all natural cement produced in the U.S.…