Rutting Potential of Parameters Using Hamburg Wheel Tracking Device (HWTD)
Matias M. Mendez Larrain, Rafiqul Alam Tarefder · Airfield and Highway Pavements 2019 · 2019
In general, asphalt concrete (AC) pavements are constructed with different types of aggregates, gradations, binder types, anti-stripping agents, and technologies. Hot mix asphalts and warm mix asphalts (HMA/WMA) mixtures are compacted at high or low temperatures to reach the specified density. Due to environmental influence and repeated traffic loading, AC pavements decay once they are under traffic stresses. Permanent deformation (rutting) in AC pavements manifests itself as longitudinal depression in the wheel paths where traffic fluctuates. The unrecoverable cumulative deformation that occurs in the wheel path under high temperatures as a result of the traffic loading is named permanent deformation or rutting. This study analyses the effect of different parameters (type of mixture, gradation and aggregate, and binder grade) in asphalt concrete (AC) mixtures using the Hamburg wheel tracking device (HWTD) destructive test. Twenty Superpave III (SP III) mixtures with different types of mixtures, gradations, types of aggregates, and types of performance binder grade were collected in New Mexico and tested at three different temperatures (40°C, 50°C, and 60°C). Results showed a significant effect of test temperature in HWTD results. Warm mix asphalts (WMA) mixtures generally showed lower impression depths than hot mix asphalts (HMA) mixtures. Aggregates performed differently under this test with good and bad results. Dacite, sand and gravel, river deposits, limestone, quartzite, limestone, and shale were studied. Similarly, different binder grades showed different behaviors when tested at different temperatures.