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Residual accelerator chemicals in medical gloves appear to be a leading cause of allergic contact dermatitis in health care workers. A new ASTM International standard allows rubber glove manufacturers to monitor the level of residual chemicals in their end products and to potentially make manufacturing changes to reduce allergen levels. The new standard, D7558 , Test Method for Colorimetric/…
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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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Once approved, a proposed new ASTM standard would provide the U.S. Food and Drug Administration and personal lubricant manufacturers a means to evaluate the effect of a lubricant on the physical integrity of condoms. No standard currently exists for this type of testing. Manufacturers of condoms and rubber gloves as well as personal lubricants are welcome to join in the development of ASTM…
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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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The growing number and severity of healthcare association infections has increased interest in standardization efforts for antimicrobial gloves. In order to explore this area, ASTM International Committee D11 on Rubber has created a new task group on antimicrobial medical gloves. Glove suppliers, manufacturers and distributors, as well as contract test labs, government agency…
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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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Responding to requests from the food service industry, ASTM International Committee D11 on Rubber has developed and approved a new standard, D7329 , Specification for Food Preparation and Food Handling (Food Service) Gloves. The new standard, under the jurisdiction of Subcommittee D11.40 on Consumer Rubber Products, will serve as a referee and guide to glove manufacturers, distributors and the…