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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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A new ASTM International standard will provide a method of testing corrosion-resistant fasteners and their performance in contact with treated wood. ASTM G198 , Test Method for Determining the Relative Corrosion Performance of Driven Fasteners in Contact with Treated Wood, was developed by Subcommittee G01.14 on Corrosion of Metals in Construction Materials , part of ASTM International Committee…
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Discussions concerning how easily test results for dimension stone test specimens can be influenced by improper or nonuniform preparation methods have led to the ongoing development of a proposed new ASTM International standard. The new standard, ASTM WK31179 , Practice for Selection and Preparation of Dimension Stone Test Specimens, is being developed by Subcommittee C18.08 on Selection of…
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Corrosion inhibitors are used extensively for pipelines in the oil and gas industry. Subcommittee G01.05 on Laboratory Corrosion Tests has been developing a series of standards on performance testing of corrosion inhibitors, including the most recently approved: ASTM G202 , Test Method for Using Atmospheric Pressure Rotating Cage. Subcommittee G01.05 is part of ASTM International Committee G01 on…
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Petrography is routinely performed on dimension stone for many construction projects in which new stone is being used, and it is often required in technical specifications. In order to facilitate this process, ASTM International Committee C18 on Dimension Stone has developed a new standard, ASTM C1721 , Guide for Petrographic Examination of Dimension Stone. The new standard is under the…, ASTM Committee C18 Next Meeting:, April 21-22, April Committee Week, St. Louis, Mo., Technical Contact:, Michael Scheffler, Wiss, Janney, Elstner Associates Inc., Northbrook, Ill., Phone: 847-272-7400; mscheffler@wje.com, ASTM Staff Contact:, Jeff Adkins, Phone: 610-832-9738; jadkins@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8432/Dec2009
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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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Localized corrosion, such as pitting, cracking or crevice corrosion, can be destructive to process equipment, but if it is detected early enough, potential damage can be minimized or avoided. A new ASTM International standard provides a means for electrochemical testing for corrosion. The new standard, G199 , Guide for Electrochemical Noise Measurement, was developed by Subcommittee G01.11 on…
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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 Subcommittee G01.10 on Corrosion in Soils will be conducting two round robin testing procedures on Tuesday, November 14, from 9:00 a.m. to 3:00 p.m. during ASTM meetings in Atlanta, Ga. One round robin will be for the development of a new standard test method to measure the oxidation-reduction potential (redox) of soils, while the other will address precision and bias for the 4…
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ASTM International Committee G01 on Corrosion of Metals has an ongoing commitment to help the oilfield and refinery industries adopt and use state-of-the-art techniques to select corrosion inhibitors. As part of this commitment, two new standards developed by Subcommittee G01.05 on Laboratory Corrosion Tests have recently been published: G 184, Practice for Evaluating and Qualifying Oilfield and…