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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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In the field of personal protective clothing, a temperature rating indicates the lowest acceptable air temperature at which an average person would be comfortable when wearing a certain set of clothing. While manufacturers believe that providing temperature ratings is helpful to consumers when they are comparing garments, there have been different methods of testing for a temperature rating. The…
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Accepted Fire Prevention Measure to Benefit Citizen Safety Seeking to prevent accidental death and damage to property related to untended cigarettes, Finland has proposed that all cigarettes sold in the country be tested to assess their likelihood to cause fire in bedding or upholstered furniture. The regulatory proposal specifies the use of ASTM E2187 - an international standard developed by…
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A new Pennsylvania law to help prevent smoking-related fires will require that cigarettes sold in the state perform well when tested using ASTM International standard E2187 , Test Method for Measuring the Ignition Strength of Cigarettes. "Careless smoking is one of the leading causes of fires, killing hundreds and injuring thousands every year," said Rep. Tim Solobay, a volunteer firefighter who…
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A proposed new ASTM International standard, WK16997 Test Method for Determining the Heat Release of Materials of Low Combustibility Using a Bench Scale Oxygen Consumption Calorimeter, will be used as a fire response test for products and materials that are difficult to ignite and have relatively low rates of heat release. The proposed standard is being developed by Subcommittee E05.23 on…
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A proposed new standard currently being developed by ASTM International Committee E05 on Fire Standards will establish a test protocol for assessing fire performance of decks and other horizontal exterior structures where combustibles beneath the structure can ignite. The proposed standard, WK17025 , Test Method for Evaluating the Under-Deck Fire Test Response of Deck Structures, is under the…
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Healthcare workers who inspect radiation protection garments will be the primary users of a proposed new ASTM International standard, WK15823 , Practice for the Fluoroscopic Inspection of Radiation Protection Garments. The proposed practice is being developed by Subcommittee F23.70 on Radiological Hazards, part of ASTM International Committee F23 on Protective Clothing. “Besides visual…
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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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Two proposed new standards currently being developed by ASTM International Committee F23 on Protective Clothing will each contribute to the safety of protective clothing. Interested parties are invited to participate in the development of both proposed standards, which are WK14247 , Specification for Air-Fed Protective Ensembles and WK14442 , Antimicrobial Activity of Textiles Following Multiple…, WK14247, Specification for Air-Fed Protective Ensembles, Subcommittee F23.30 on Chemicals invites users and manufacturers of air-fed protective ensembles to participate in the development of a proposed new standard WK14247 . This proposed specification would establish design, performance, documentation, labeling and certification requirements for protective ensembles that rely on principal air supply to the wearer via an air line or air filtered…, WK14442, Antimicrobial Activity of Textiles Following Launderings with Bleach, Antimicrobial treatments often are applied to textiles to impart durable efficacy, reducing the survival and growth of microorganisms on the textile. A proposed new ASTM standard, WK14442 , under the jurisdiction of F23’s biological subcommittee, F23.40 , would ensure these antimicrobial agents would continue to work throughout a garment’s life span. “Over the last 10 years, the industry has…
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A new ASTM International standard will be used to quantify the uncertainty associated with measurements in fire tests in a consistent manner, while a proposed new E05 standard, WK14401 , Evaluating the Fire Test Response of Deck Structures to Burning Brands, will determine the fire test response of deck structures. , ASTM E 2536, Guide for Assessment of Measurement Uncertainty in Fire Tests, “Users of fire test data often need a quantitative indication of the quality of the data presented in a test report,” says Marc Janssens, director of the fire technology department at Southwest Research Institute and first vice chairman of Committee E05 . “This quantitative indication is referred to as the measurement uncertainty.” E 2536 will be used to quantify the uncertainty associated…, ASTM WK14401, Evaluating the Fire Test Response of Deck Structures to Burning Brands, Subcommittee E05.22 on Surface Burning is developing a proposed new standard, WK14401 , that will determine the fire test response of decks or other horizontal ancillary structures attached to or in close proximity to primary structures. While E05.22 member Paul Hough says that the task group working on WK14401 is already well-represented by manufacturers, regulators, wildland fire experts and…