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Subjects Include Aggregate Resistivity, Lightweight Aggregates, Methacrylate Bonding Systems and Semi-Adiabatic Calorimetry The following four proposed new standards are among those currently being developed by subcommittees under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates. Subject matter covered by these standards includes aggregate resistivity, lightweight…
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ASTM Pervious Concrete Subcommittee Developing Proposed Standard for Sustainable Mixture ProportionsOnce approved, a proposed new ASTM standard will aid concrete producers in developing sustainable and durable mixture proportions for pervious concrete. The proposed new standard, WK23367 , Test Method for Evaluating the Surface Durability Potential of a Pervious Concrete Mixture, is being developed by Subcommittee C09.49 on Pervious Concrete, part of ASTM International Committee C09 on Concrete…
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A proposed new ASTM International standard, ASTM WK22233 , Test Method for Indication of Concrete’s Ionic Conductivity, describes a five-minute nondestructive test that has the potential to replace a destructive six-hour test requiring several hours of preparation time. The proposed standard is being developed by Subcommittee C09.66 on Concrete’s Resistance to Fluid Penetration, part of ASTM…
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Shrinkage that occurs during the drying process is a major cause of cracking in concrete. However, application of shrinkage-reducing admixtures in the field has been yielding positive results, and engineers have realized that admixtures can mitigate cracking. A new ASTM standard currently being developed by Subcommittee C09.23 on Chemical Admixtures will set minimum standards for an admixture to…
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Because of its porous nature, pervious concrete cannot be tested using standards developed for traditional concrete. In order to fill this need, ASTM International Committee C09 on Concrete and Concrete Aggregates is developing a series of proposed test methods specific to pervious. The first of these proposed standards, ASTM C1688/C1688M , Test Method for Density and Void Content of Freshly…
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[i][url=http://www.astm.org/COMMIT/COMMITTEE/D02.htm]ASTM Committee D02 [/url]Publishes New and Revised Biodiesel Specifications [/i] High costs at the pump, renewable energy and alternate sources continue to headline today’s news and a group of newly published ASTM International specifications sets the standard for one of these fuels: biodiesel, a fuel used in freight trucks, buses, boats ships…
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[i]Se acaban de terminar las especificaciones para las mezclas B6 a B20 y se modificaron las del diésel y del combustible para quemadores que incluirán hasta las mezclas B5[/i] Los precios más altos en los surtidores y las fuentes de energía renovable y alternativas siguen encabezando las noticias de hoy y una serie de especificaciones de la ASTM International recientemente publicadas fijan la…
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Two new calibration standards for use with X-ray fluorescence equipment in the chemical analysis of hydraulic cement are now available from the Cement and Concrete Reference Laboratory (CCRL). The new standards are designated Portland Cements 167 and 168 and are vacuum-sealed to prevent moisture uptake. Robin Haupt, supervisor, CCRL proficiency sample program, says that the two new cements were…
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B6 to B20 blends are newly specified; diesel and burner fuel specifications are revised to include up to B5 blends Higher costs at the pump, renewable energy and alternate sources continue to headline today's news, and a group of newly published ASTM International specifications sets the standard for one type of these fuels: biodiesel. Four standards now available from ASTM International provide…
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Four ASTM International standards that specify biodiesel have achieved final ASTM approval and will proceed toward publication and availability, which is anticipated for mid-October. The new and newly revised specifications will be used in engine design, to include in bid and purchasing contracts or to check fuel quality at the pump. The standards include the following: ASTM D975-08a ,…