Search
Advanced search
Filter by category
Filter by committee
Search results
-
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…
-
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…
-
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…
-
The realization that concrete production is the result of a combination of several materials that are individually standardized, but which may interact in ways not governed by those standards, led ASTM International Committee C09 on Concrete and Concrete Aggregates to form Subcommittee C09.48 on Performance of Cementitious Materials and Admixture Combinations in 2004. The subcommittee has now…
-
ASTM International Committee F24 on Amusement Rides and Devices will celebrate its 30th anniversary this year, marking its significant contributions to the global amusement industry. ASTM is one of the largest voluntary standards development organizations in the world., F24 Standards: The Foundation for Safe Fun, Since 1978, ASTM Committee F24 has developed the standards that are the underpinning of safety for amusement rides and attractions around the world. During the past three decades, Committee F24 has contributed a comprehensive range of standards that cover design, manufacturing, maintenance, inspection and operations across traditional amusement rides, specialty rides and attractions, and water-…, F24: Global Experts Developing Internationally Accepted Standards, ASTM Committee F24 brings together global amusement industry stakeholders in a best-in-class standards development forum. Today, F24 comprises approximately 500 professionals from 23 countries across North America, South America, Europe and Asia. F24 members include ride designers and manufacturers, engineers, technicians, regulators, inspectors, park owners and operators, consumer advocacy…, Supporting Ride Innovation and Amusement Growth, As new categories of amusement rides have been introduced and grown in popularity, ASTM Committee F24 has kept pace by addressing emerging requirements for standards. In the last several years, new F24 subcommittees have been formed to address growth in areas such as water rides as well as specialty attractions like go-karts, inflatable amusement devices and bumper boats., A Model of Industry Cooperation, To help to establish worldwide consistency in major areas of ride safety standards, ASTM Committee F24 works in close partnership with other representative organizations of the global amusement industry, such as the International Association of Amusement Parks and Attractions (IAAPA). ASTM F24 and IAAPA bring together representatives from industry and standards bodies from around the world for…
-
Applications are currently being accepted for the 2008 ASTM International Katharine and Bryant Mather Scholarship. Administered by ASTM International Committee C09 on Concrete and Concrete Aggregates, the scholarship applies to students pursuing degrees specializing in cement or concrete materials technology or concrete construction. Full-time undergraduate students completing their second/…
-
A proposed new standard being developed by ASTM International Committee C09 on Concrete and Concrete Aggregates will monitor clogging and long-term permeability of pervious pavements as well as determine if early sealing of the pavement has occurred during construction. This proposed standard, WK17606 , Test Method for Permeability of Pervious Concrete Pavements, is under the jurisdiction of…
-
All interested parties are invited to join in the activities of Subcommittee C09.49 on Pervious Concrete as it develops its first proposed standard, WK16885 , Test Method for Density and Void Content of Pervious Concrete. The subcommittee is under the jurisdiction of Committee C09 on Concrete and Concrete Aggregates. “WK16885 and forthcoming standards for pervious concrete arose from the need to…
-
A new ASTM standard, C 1646/C 1646M , Practice for Making and Curing Test Specimens for Evaluating Frost Resistance of Coarse Aggregate in Air-Entrained Concrete by Rapid Freezing and Thawing, now provides requirements for specimen preparation for C 666 testing. Both C 666 and C 1646 are under the jurisdiction of Subcommittee C09.67 on Resistance to the Environment, part of ASTM International…
-
Two recently formed task groups on preparing pervious concrete specimens and research will be participating in the first meeting of the new Subcommittee C09.49 on Pervious Concrete from 8:00 to 10:00 a.m. on June 25 during the ASTM Committee Week in Norfolk, Va. C09.49 is part of ASTM International Committee C09 on Concrete and Concrete Aggregates. Heather Brown, Middle Tennessee State University…, Standardization News, , Karthik Obla, chair of Subcommittee C09.49, noted that there has been a resurgence in interest in pervious concrete due to the U.S. Environmental Protection Agency’s recent recognition of its use as a best management practice for storm water management. An increasing focus on sustainability and the green movement has also contributed to the importance of pervious concrete as a building material…