The latest episode of the AASHTO re:source Q&A podcast explores the development and significance of the new AASHTO R 119 standard; officially titled “Standard Practice for Grinding the Ends of Cylindrical Concrete Specimens.”
[Above image by AASHTO]
AASHTO re:source is a technical service program offered by the American Association of State Highway and Transportation Officials that provides services and tools through three major programs: the Laboratory Assessment Program, the Proficiency Sample Program or PSP, and the AASHTO Accreditation Program or AAP.
Brian Johnson, director of the AAP, played a key role in creating this standard and highlights in this podcast episode the collaborative efforts conducted with various state departments of transportation to establish the new standard.
He also explains why the new AASHTO R 119 standard will play a critical role in the standardization of concrete practices, especially for those working with ultra-high-performance concrete or UHPC, as well as how the new standard addresses the limitations of traditional capping methods.
Johnson explains in this podcast episode that traditional methods of capping, such as using pad caps, sulfur capping, or gypsum capping, are insufficient for UHPC due to its high strength. Instead, UHPC requires the ends of cylindrical specimens to be ground to a precise planeness of 0.002 inches before testing for compressive strength.
This necessity led to the development of AASHTO R 119, which standardizes the grinding process, ensuring consistency and reliability in test results.
To listen to the full podcast episode, click here.
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