Search
Advanced search
Filter by category
Filter by committee
Search results
-
A proposed new ASTM International standard will provide the electrical power industry with a relatively straightforward test for oxidation stability of natural esters. Natural esters, also known as vegetable oils, can be used as an alternative to mineral oil as an insulating liquid in power transformers and other electrical equipment. The proposed standard is ASTM WK21616 , Test Method for…, ASTM Committee D27 Next Meeting:, Nov. 9-11, 2014, November Committee Week, New Orleans, La., Technical Contact:, Kevin J. Rapp, Cargill Industrial Specialties, Brookfield, Wis., Phone: 262-797-5584; kevin_rapp@cargill.com, ASTM Staff Contact:, Kelly Paul, Phone: 610-832-9745; kpaul@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #9618
-
Current members of ASTM International Committees C01 on Cement and C09 on Concrete and Concrete Aggregates , and other interested parties, are invited to join a new C01 subcommittee, C01.98 on Sustainability Assessment. The scope of C01.98 is to support the development and maintenance of standards related to methodologies and metrics for assessing sustainability in the manufacture and use of…
-
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,…
-
Wet blue and wet white are intermediate products used by tanneries that process natural hides and skins into leather. Natural fats and oils need to be largely removed from wet blue and wet white for leather processing to be done properly, but no standard had previously existed to evaluate the effectiveness of such removal. ASTM International Committee D31 on Leather has now developed such a…
-
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…
-
ASTM International Committee D27 on Electrical Insulating Liquids and Gases is continuing its work on standards for natural esters with the development of a proposed new standard, WK21616 , Test Method for Oxidation Induction Time of Natural Ester Insulating Fluids by Pressure (PDSC) or Regular Differential Scanning Calorimetry (DSC). The proposed standard was submitted under the jurisdiction of…
-
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…
-
During the past five years, certain insulating oils have been found to contain corrosive sulfur that can produce copper sulfide deposits as a function of time and temperature in operating equipment. A proposed revision to ASTM standard D 1275, Test Method for Corrosive Sulfur in Electrical Insulating Oils, will provide a means to certify that new or in service oils either contain or do not…
-
ASTM International will launch a new Proficiency Testing Program (PTP) on Dissolved Gas Analyses (DGA) of In-Service Insulating Fluid in February 2006. The program will be offered to laboratories who need a statistical quality assurance tool that will enable them to improve and maintain a high level of performing ASTM standard D 3612, Test Method for Analysis of Gases Dissolved in Electrical…
-
ASTM International Committee D31 on Leather has decided to reactivate Subcommittee D31.05 on Upholstery. During a period of inactivity for several years, the subcommittee was combined with Subcommittee D31.04 on Apparel. However, the last two years have seen an increase in the level of participation from people involved in upholstery leather manufacturing, so the subcommittees have again been…