Friction management on Kansas Department of Transportation highways : technical summary.

PDFTech ReportReport Number: K-TRAN: KSU-14-5Friction courseSurface course (Pavements)Rolling frictionSliding frictionSkiddingHydroplaningVehicle factors in accidentsKansasUnited StatesKansas. Dept. of Transportation. Bureau of ResearchZahir, HumairaIslam, ShuvoHossain, MustaqueKansas. Dept. of Transportation. Bureau of ResearchUS Transportation CollectionThe objectives of this study are to evaluate the performance of a local aggregate in HFST and to evaluatethe 3-dimensional laser profiler for measuring pavement texture. Slab specimens of hot-mix asphalt(HMA) were compacted in the laboratory and treated with HFST systems incorporating both calcinedbauxite and a local, hard flint aggregate from Picher, Oklahoma. The treated HMA specimens werethen tested with a Dynamic Friction Tester (DFT) and a Circular Track Meter (CTM) to determine thefrictional coefficient and texture depth, respectively. Also, Hamburg Wheel Tracking Device tests wereconducted on these HFST systems to evaluate wearing resistance under repetitive wheel load. Fieldmeasurements of texture depths on HFST were also done. Statistical analysis was performed to comparethe performance of high friction surfaces prepared with different aggregate epoxy combinations.The results show that flint aggregate can be a suitable substitute for the calcined bauxite in HFST.Field measurements also showed marked improvements in texture depth with HFST. Texture depth andskid number determined by the ASTM skid trailer vary with pavement surface types and treatments.Mean Texture Depth (MTD) of high friction surface treatment is generally greater than 1 mm. A goodcorrelation between skid number and MTD was found for the MTD range of 0.5 to 1.5 mm