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Consumers who are purchasing building materials for homes want to be assured that the materials are mold resistant. A proposed new ASTM standard will allow for a mold-resistance rating to be given to specific materials, depending on how the materials perform to the test method. The proposed new standard, ASTM WK32079 , Test Method for Determination of Mold Growth on Building Products Designed for…
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While standards for outdoor calibration techniques for solar radiometers exist, there are currently no general standards that deal with issues of indoor calibration transfers between radiometers of different design. A proposed new ASTM standard, ASTM WK27263, Test Method for Indoor Transfer of Calibration from Reference to Field Pyranometers, will address in detail issues associated with…
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A new ASTM International standards developing activity, Subcommittee E44.20 on Glass for Solar Applications, was formed during a virtual meeting on Sept. 29. Meeting participants, including government representatives, equipment and product manufacturers and members of ASTM International Committees E44 on Solar, Geothermal and Alternative Energy Sources and C14 on Glass and Glass Products approved…
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Standards relating to the performance of photovoltaic (PV) modules have historically focused on initial qualification testing and not issues of durability and functional service life. Subcommittee E44.09 on Photovoltaic Electric Power Conversion is now working on a proposed new standard that will cover these long-term issues: ASTM WK25362 , Practice for Photovoltaic Module Reliability Assessment…
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All interested participants are invited to attend a virtual organizational meeting for a new ASTM International activity on solar glass on Tuesday, Sept. 29, at 1:00 p.m. EDT. Representatives from the United States Department of Energy, ASTM International Committee E44 on Solar, Geothermal, and Other Energy Sources, and ASTM International Committee C14 on Glass and Glass Products will be among…
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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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Explorations into alternative forms of energy have increased interest in standards for solar energy applications. ASTM International Committee G03 on Weathering and Durability has recently approved a new standard in this area, G197 , Table for Reference Solar Spectral Distributions: Direct and Diffuse on 20° Tilted and Vertical Surfaces. ASTM G197 was developed by Subcommittee G03.09 on…
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Automotive companies and interior suppliers will be the primary users of a proposed new ASTM International standard that will aid in testing of automotive interior materials and parts, draperies or other applications in which durability behind glass is desired. The proposed standard, WK16895 , Practice for Conducting Exposures in Outdoor Glass-Covered Exposure Apparatus with Air Recirculation, is…
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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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A new ASTM International standard describes a variety of methods that can be used to determine the index of refraction and dispersion of glass. The standard, C 1648 , Guide for Choosing a Method for Determining the Index of Refraction and Dispersion of Glass, will be useful to manufacturers of glass and glass products as well as designers of products in which glass is a critical component. C 1648…