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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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Hydrogels are highly hydrated polymer networks that can be used in the regenerative medicine field as “scaffolding” for the repair of tissue. A proposed new ASTM standard will provide those working in regenerative medicine with a means of characterizing hydrogels. The work item, ASTM WK21927 , Guide for Characterization of Hydrogels Used in Regenerative Medicine, is under the jurisdiction of…
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Each year, approximately 400,000 healthcare workers (HCW) in the United States suffer accidental injury from needles and other medical sharps while tending to patients. These injuries can result from injections, drips, infusions, blood-taking, surgery, biopsy and research, among other causes. Each of these accidents carries a small but documented risk of transmitting more than 60 blood-borne…
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Participation is welcome in a task group that is developing a proposed new ASTM International standard for manufacturers of vascular graft tissue engineered medical products. WK21657 , Guide for Characterization and Assessment of Vascular Graft Tissue Engineered Medical Products (TEMPs), is being developed by a task group under the jurisdiction of subcommittee F04.04 on Tissue Engineered Medical…
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Subcommittees F04.41 - F04.46 , which deal with Tissue Engineered Medical Products (TEMPs), part of ASTM International Committee F04 on Medical and Surgical Materials and Devices, will meet Oct. 27-28 at the National Physical Laboratory in Teddington, United Kingdom. The meeting will focus on the ongoing development of several proposed TEMPs-related standards. Several TEMPS standards are…
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A new ASTM International standard provides testing procedures for devices that can be used to treat spinal disorders while allowing for continued joint movement. The standard, ASTM F2624 , Test Method for Static, Dynamic and Wear Assessment of Extra-Discal Spinal Motion-Preserving Implants, was developed by Subcommittee F04.25 on Spinal Devices, part of ASTM International Committee F04 on Medical…
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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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Technical advancements in both tissue engineering and bone substitute materials have resulted in a great increase in the number of tissue-engineered medical products available on the market. Many of these new products are mineral-based, often using calcium phosphate scaffolds. While there are some general standards on scaffolds in tissue-engineered medical products, a comprehensive standard on…
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ASTM International Committee F04 on Medical and Surgical Materials and Devices is developing a proposed new standard that will help the medical device industry with the measurement and reporting of vascular stent radial stiffness and strength. The proposed standard, WK15227 , Test Methods for Radial Stiffness and Strength of Balloon Expandable Stents, is under the jurisdiction of Subcommittee F04…
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Understanding how blood within a human body will interact with any substance with which it comes in contact is a crucial part of any medical process. A new practice recently approved by ASTM International Committee F04 on Medical and Surgical Materials and Devices is one of a series of standards that evaluates the complement activating properties of solid materials intended for use in contact…