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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 F32 on Search and Rescue is currently developing a number of proposed new standards. Two of the proposed standards under the jurisdiction of Subcommittee F32.02 on Management and Operations are WK23984 , Guide for Level 1 (Basic) Mounted Search and Rescue (MSAR) Responder, and WK24699, Guide for Training for Land SAR as a Level 1 Out of Area Disaster Responder.…
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ASTM International Committee F38 on Unmanned Aircraft Systems will meet at ASTM International Headquarters on Wednesday and Thursday, July 22 and 23. The meeting will open with a briefing on the small UAS (sUAS) landscape from FAA and F38, and discussion on standards needed to support regulatory efforts. This is based on the recommendations of the FAA’s sUAS Aviation Rulemaking Committee (ARC…
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The importance of telecommunicators in the search and rescue field cannot be overstated. Dispatchers receiving and delivering accurate information in a timely manner are critical to any SAR operation. A new standard developed by ASTM International Committee F32 on Search and Rescue highlights the importance of proper training for SAR dispatchers. The standard, ASTM F2662 , Guide for Minimum…
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Subcommittee F38.01 on Airworthiness, part of ASTM International Committee F38 on Unmanned Air Vehicle Systems, has approved a new standard for flight authority and is currently working on a proposed standard that covers UAS recovery systems. Subcommittee F38.01 welcomes participation in its ongoing standards development activities. ASTM F2690 - Flight Authority Gerry Marsters, president,…
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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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Two proposed new ASTM International standards are part of the extensive work being done by Committee F32 on Search and Rescue to develop a comprehensive set of standards for search and rescue team training. The proposed new standards, WK15661 , Guide for Level I Rope Rescue Technician Endorsement, and WK15503 , Guide for Training of Level I Rescue Technician, are both under the jurisdiction of…
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When ASTM International Committee F38 on Unmanned Aircraft Systems was formed in 2003, it is safe to say no one on the committee was thinking about catapults and trebuchets. However, a study of these medieval devices was integral to the development of a new F38 standard, F 2585 , Specification for Design and Performance of Pneumatic-Hydraulic Unmanned Aircraft System (UAS) Launch System. F 2585…
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All interested parties are invited to attend the meetings of ASTM International Committee F38 on Unmanned Aircraft Systems on Nov. 13 and 14, during the November Committee Week in Atlanta, Georgia. The subjects to be discussed at the meeting are sense-and-avoid, terminology, launchers, visual range flight practices, commercial pilot practices and manufacturing quality assurance practice. One trio…
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Having the necessary documentation to maintain and repair any sort of aircraft is of the utmost importance. With this in mind, ASTM International Committee F38 on Unmanned Aircraft Systems has developed a new standard, F 2584 , Practice for Maintenance and Development of Maintenance Manuals for Light Unmanned Aircraft System (UAS). The new practice, which is under the jurisdiction of Subcommittee…