Standardization News

New ASTM Concrete Standard to Promote Consistent Roller Design

Laboratories that conduct beam tests on fiber reinforced concrete are encouraged to join in the development of a new ASTM International standard, WK42757, Practice for Design of Supporting Rollers to Be Used in Fiber Reinforced Concrete Beam Tests.

According to ASTM member Stefan Bernard, WK42757 is being developed in response to concerns over possible distortions in the magnitude of performance data obtained in beam tests on fiber reinforced concrete and increases in variability between labs. The new test will ensure that laboratories use a consistent design of supporting rollers that will hopefully reduce variations between labs.

"The principle application for the proposed standard will be testing of fiber reinforced concrete and, in particular, assessment of post-cracking flexural strength," says Bernard. Bernard notes that contractors and infrastructure owners will be the main customers for test data generated by the standard. Fiber reinforced concrete is used in floors, pavements, shotcrete and tunnel structures.

WK42757 is being developed by Subcommittee C09.42 on Fiber-Reinforced Concrete, part of Committee C09 on Concrete and Concrete Aggregates.

CONTACT Technical Information: Stefan Bernard, TSE Pty Ltd. • Sydney Australia • tel +61.4.1840.7892 | ASTM Staff: Scott Orthey • tel +1.610.832.9730 | Upcoming Meeting: June 14-17 • June Committee Week • Anaheim, Calif.

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