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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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Determining and potentially reducing the amount of energy expended by vacuum cleaners is the purpose of a proposed new ASTM international standard, WK21491 , Test Method For Determining Energy Consumption of Vacuum Cleaners Relative to Cleaning. The proposed standard is being developed by Task Group F11.20.04 On Energy Usage And Performance, under the jurisdiction of Subcommittee F11.20 on…
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All interested parties in the glass industry are invited to participate in the development of a proposed new standard guide for the safe handling of annealed glass. The new standard will be developed by a task group within ASTM Committee E34 on Occupational Health and Safety. A small group from industry and OSHA met in Rossford, Ohio, in March to discuss this new activity. The task group plans to…
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ASTM International Committee F11 on Vacuum Cleaners invites all interested parties to participate in a virtual meeting regarding a new standards developing activity on vacuum cleaner energy measurements. The meeting will be held June 25 at 10:00 a.m. EDT. Through this activity, Committee F11 plans to develop a standard or set of standards that will aid in increasing the energy efficiency of…
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Particulate matter emitted during the use of a vacuum cleaner is a significant area of concern that ASTM International Committee F11 on Vacuum Cleaners has dealt with by developing and approving F 2608 , Test Method for Determining the Change in Room Air Particulate Counts as a Result of the Vacuum Cleaning Process. Now, the committee is developing a proposed new standard that addresses the final…
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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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Information and product destruction services is a rapidly growing industry. In order to develop standards to serve the needs of this industry, ASTM International Committee E34 on Occupational Health and Safety has formed Subcommittee E34.25 on Mobile and Plant-Based Security Destruction Equipment Safety Requirements. All interested parties are invited to participate in the standards developing…
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ASTM International Committee F11 on Vacuum Cleaners has fulfilled an industry need with the approval of a new standard, F 2608 , Test Method for Determining the Change in Room Air Particulate Counts as a Result of the Vacuum Cleaning Process. The standard is under the jurisdiction of Subcommittee F11.23 on Filtration. “The industry determined a need for a test method that is representative of…
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An important standard that is used to help protect the health of workers where there may be occupational exposure to quartz dust has recently been revised. ASTM standard E 1132 , Practice for Health Requirements Relating to Occupational Exposure to Respirable Crystalline Silica, was developed by Subcommittee E34.16 on Silicas, which is under the jurisdiction of Committee E34 on Occupational…
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A proposed new standard currently being developed by ASTM International Committee F01 on Electronics will prove to be useful to the tantalum sputtering target industry. The proposed standard, WK9490, Test Method for Reporting Crystallographic Orientation of Sputtering Target Materials, is under the jurisdiction of Subcommittee F01.17 on Sputter Metallization. "The tantalum sputtering target…