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A new ASTM International practice provides a standard for preparing a mixture of cement paste that will simulate the shearing experienced by the cement paste in concrete. The new standard, ASTM C1738 , Practice for High-Shear Mixing of Hydraulic Cement Pastes, was developed by Subcommittee C01.22 on Workability , part of ASTM International Committee C01 on Cement . According to Chiara Ferraris,…
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Three-dimensional laser scanning is a maturing technology that holds great promise for capturing highly accurate information about an object or scene by collecting millions of dense measurements very quickly. ASTM International Committee E57 on 3D Imaging Systems is developing new standards for this technology, including ASTM E2807 , Specification for 3D Imaging Data Exchange, Version 1.0. ASTM…
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A new task group within ASTM Committee E57 on 3D Imaging Systems plans to develop standards on position and orientation (pose) determination that could help increase productivity and enhance the global competitiveness of the U.S. manufacturing industry. The task group, under the jurisdiction of Subcommittee E57.02 on Test Methods, is currently working on its first proposed new standard, ASTM…
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Hard surface cleaning products that employ steam comprise a new and growing segment of the vacuum cleaner market, although there are currently no agreed-upon industry-wide standards for such products. A new ASTM subcommittee, F11.40 on Steam Products , part of ASTM International Committee F11 on Vacuum Cleaners , will be developing test methods to measure the performance and durability of steam…
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Three-dimensional laser scanning is an emerging technology that holds great promise for capturing dimensionally accurate information about an object or scene by collecting millions of dense measurements very quickly. ASTM International Committee E57 on 3D Imaging Systems is developing new standards for this technology, including ASTM E2761, Specification for 3D Imaging Data Exchange. ASTM E2761,…
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Three dimensional image system technology is now used in a wide variety of industries, including construction, mapping, manufacturing, mining and forensics. For all of these industries, safe usage of 3D imaging equipment is a top priority. However, until the approval of a new ASTM International standard, no safety guidelines specifically oriented toward 3D image system technology existed. The…
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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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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…