Frictional Properties of Commonly Used Aggregates: Laboratory Evaluation
This presentation focuses on the frictional properties of typical aggregates used by INDOT in pavement construction. It presents the methodology for assessing aggregate properties, including chemical, physical, and mechanical characteristics. Aggregates such as dolomite, limestone, gravel, and steel slag are tested through various laboratory procedures, including the X-ray fluorescence (XRF), hardness, Los Angeles Abrasion (LAA), Micro-Deval Abrasion (MDA), and Polished Stone Value (PSV) tests, to evaluate their frictional properties. Key findings reveal strong correlations between properties like specific gravity and water absorption with mechanical performance indicators, while chemical compositions like aluminum oxide and titanium dioxide play a role in determining aggregate mechanical properties. This presentation also provides an in-depth analysis of the aggregate chemical and physical properties, and how they correlate with mechanical properties, especially frictional properties. The results offer valuable insights for selecting aggregates for improved pavement durability and safety.