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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 F37 on Light Sport Aircraft is currently at work on a proposed new standard that will aid light sport aircraft manufacturers in understanding the standardization system that governs their products. ASTM WK22124 , Guide for Compliance with Light Sport Airplane Standards, is under the jurisdiction of the F37.20 Airplane subcommittee. According to Thomas Gunnarson, U.S.…
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ASTM International Committee F37 on Light Sport Aircraft will meet March 30 to April 1, 2009, at the Messe Friedrichshafen Exhibition Grounds in Friedrichshafen, Germany, in conjunction with AERO Friedrichshafen 2009. The three days of F37 technical meetings will include discussions on changes to key LSA standards and proposals for new documents. It will also include several other activities,…
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A proposed new ASTM International practice will allow a wide variety of users to differentiate levels of effectiveness among the many types of security fence systems that currently exist. WK19721 , Practice for Evaluation of the Effectiveness of Different Types of Fence Systems, is under the jurisdiction of Subcommittee F14.50 on High Security Fences and Perimeter Barriers, part of ASTM…
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A new ASTM International standard provides instructions for developing the chain-link fence design, layout and installation for a wide variety of sports and recreational facilities and other applications. The standard, F 2631 , Practice for Installation of Chain-Link Fence for Outdoor Sports Fields, Sports Courts and Other Recreation Facilities, was developed by Subcommittee F14.10 on Specific…
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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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ASTM International Committee F14 on Fences is seeking a volunteer to head a task group that will develop a proposed new standard for temporary fences, WK14410 . The proposed new standard will be under the jurisdiction of Subcommittee F14.10 on Specific Applications. WK14410 will address several aspects of temporary fences, including safety, construction sites, crowd control, security and…
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ASTM International Committee F14 on Fences has approved a new chain link fence standard that will have a variety of security applications. The standard, F 2611 , Guide for Design and Construction of Chain Link Security Fencing, contains information on the proper material selection and system installation and layout, all of which can substantially increase the difficulty of penetration. F 2611 is…
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A new standard developed by ASTM International Committee F37 on Light Sport Aircraft covers the instructions a kit producer must provide to a consumer regarding how to assemble and safely flight-test a recreational aircraft to ensure compliance with applicable ASTM standards. The new standard, F 2563 , Practice for Kit Assembly Instructions of Aircraft Intended Primarily for Recreation, is under…
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ASTM International Committee F14 on Fences is currently seeking participation in recently formed Subcommittee F14.50 on High Security Fences and Perimeter Barriers. The purpose of the new subcommittee is to develop a series of standards that address a higher level of security fencing and perimeter barrier than currently exist. These standards would also be used to support the efforts of ASTM…