Correlation Between Laboratory Testing and Field Performance for Balanced Mix Design of Asphalt Pavements

Mechanical testing of asphalt mixtures plays a crucial role in assessing their anticipated field performance in pavements. However, establishing a reliable correlation between laboratory and field performance is an ongoing challenge, with additional data providing increased confidence. In the context of balanced mix design (BMD), the need for performance tests and corresponding thresholds that exhibit a strong relationship with field performance is paramount. This report presents an exploration of correlations between rutting and cracking tests conducted as part of a Texas BMD implementation project. A comprehensive monitoring effort was carried out on 9 field projects with multiple field sections, encompassing a total of 33 distinct mixtures, over a period ranging from 1 to 4 years. The aim was to explore the correlations between laboratory test results and observed field performance. Remarkably strong correlations were observed between the ideal rutting test (IDEAL-RT) and field rutting, suggesting its potential use in mix design and production. Other promising correlations were seen using the ideal cracking test (IDEAL-CT) and the Texas Overlay Test (OT) and field cracking. This report comprises preliminary findings with field data available to date. These findings contribute to the advancement of BMD methodologies, providing valuable insights for optimizing asphalt pavement performance and enhancing infrastructure sustainability. Monitoring of these and other field sections is ongoing, and additional publications will be forthcoming as data are collected and analyzed.