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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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Owners and specifiers of steel building projects will be the primary users of a new ASTM International standard, ASTM A1068 , Practice for Life-Cycle Cost Analysis of Corrosion Protection Systems on Iron and Steel Products. The new standard was developed by Subcommittee A05.13 on Structural Shapes and Hardware Specifications, part of ASTM International Committee A05 on Metallic-Coated Iron and…
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Quality of materials and proper installation are keys to maintaining the effectiveness, safety and durability of radiant barrier systems used for thermal insulation. Two new ASTM standards will provide important information to both users and installers of radiant barrier systems. The new standards are ASTM C1743 , Practice for Installation and Use of Radiant Barrier Systems (RBS) in Residential…
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Subcommittee A05.13 on Structural Shapes and Hardware Specifications is currently working on proposed new standards that would be used by engineers and architects who design with steel fabrications. These proposed standards will be used to evaluate the costs of steel construction over the lifetime of a project and to compare different corrosion protection systems on their impact to this lifetime…
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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 A05 on Metallic-Coated Iron and Steel Products has approved a new standard, ASTM A1059/A1059M , Specification for Zinc Alloy Thermo-Diffusion Coatings (TDC) on Steel Fasteners, Hardware and Other Products. The new standard is under the jurisdiction of Subcommittee A05.13 on Structural Shapes and Hardware Specifications. The technology described in ASTM A1059/A1059M…
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Galvanized steel products are manufactured and used throughout the world. A new ASTM International standard, A1057/A1057M , Specification for Steel, Structural Tubing, Cold Formed, Welded, Carbon, Zinc-Coated (Galvanized) by the Hot-Dip Process, addresses the galvanizing process as it is used across a variety of industries, including construction, automotive and transportation. The new standard…
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ASTM International Committee C16 on Thermal Insulation will hold a forum on “Thermal Insulation in 2008: Perspectives on Economic Thickness, Contributions to Sustainability, and Design of Power & Process Facilities” on Monday, April 7, 2008, from 5 to 6 p.m., in Anaheim, Calif. The forum will be held in conjunction with the April 6-9 standards development meetings of the committee. Three…
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Work is continuing on a proposed new ASTM International standard that will aid laboratories and materials manufacturers in testing the moisture properties in construction materials. The proposed standard, WK16466 , Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates, is under the jurisdiction of Subcommittee C16.33 on Insulation Finishes and Moisture, part…
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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…