FRT 239, Laboratory Equipment Evaluation for the Design of Sustainable Friction and Macro-Texture (Phase 2 of FRT 234)

Grants and Contracts Details


Abstract FRT 239, Laboratory Equipment Evaluation for the Design of Sustainable Friction and Macro-Texture (Phase 2 of FRT 234) 07/01/2023-06/30/2025 This research project would assist the Cabinet in collecting the necessary laboratory and field data to evaluate sustainable friction levels for Kentucky Roadways. To enhance the ability to evaluate asphalt mixtures during the mix design phase, a method of laboratory polishing of mixtures, and laboratory friction/texture measurement is needed. Several groups are looking at the methodologies required to incorporate this into routine mix design. At present all are still in the testing/experimental phase of the process. To implement this type of process the following steps would be necessary. Work has been done to evaluate the use of the 3-wheel polisher and DFT to evaluate mixtures, but do date, nothing has been published which links this information to actual field performance. The objectives of this research task will be accomplished by completing the following tasks: Task 1: Review of current literature available regarding laboratory friction evaluation during the mix design process. Task2: Review the testing procedures that have been used by NCAT and other agencies to conduct laboratory Task 3: sample polishing for testing with the Dynamic Friction Tester and laboratory texture measurement. Assist with the development of Kentucky Methods related to laboratory sample polishing and Task 4: friction/texture measurement. Select Evaluation Projects: ? Select projects with various friction properties 15 to 30 projects. ? Recreate mixes in laboratory, polish to observed field friction level. ? Develop laboratory polishing cycles correlation with cumulative traffic counts (CTC) ? Select additional projects to complete lab polishing to field friction correlation level. Work with the Cabinet to continue to measure field friction on selected projects using the locked wheel, DFT, SCRIM testing procedures and texture. Task 5: Develop estimation tools to be utilized by mix designers to predict potential friction and texture properties. Task 6: Select pilot projects designed using mix design estimation tools monitor performance with Locked Wheel, DFT, SCRIM, and Texture. Task 7: Project Report
Effective start/end date7/1/236/30/25


  • KY Transportation Cabinet: $178,425.00


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