Performance-Based Binder Testing Is Subject of New Standard
High traffic volume and heavy loads put an immense strain on roadways everywhere. Using polymer-modified binders that can reduce the amount of rutting and cracking in pavement can help by increasing the durability and strength of asphalt pavement. However, proper performance-based testing of binders is crucial. A new ASTM International standard will be used by state and federal highway agencies, refineries, asphalt binder suppliers and users, and other organizations that need to characterize unmodified or modified asphalt binders. D7405, Test Method for Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer, has been developed by Subcommittee D04.44 on Rheological Tests, part of ASTM International Committee D04 on Road and Paving Materials.
“This standard will be used to conduct tests that will provide alternative fundamental property measures to identify the presence of elastomeric polymers in modified asphalt binders,” says Raj Dongre, a highway industry consultant and D04 member. Dongre notes that, unlike many current methods, D7405 provides performance-based measures for testing binders.
Users and producers of modified asphalt binders and other interested parties are welcome to participate in the activities of Subcommittee D04.44.
Technical Information: Raj Dongre, Dongre Laboratory Services Inc., Fairfax, Va.
ASTM Staff: Daniel Smith