Resumen de Permanent deformation evaluation of Idaho Superpave mixes using the gyratory stability
F. Bayomy, A. Abu Abdo, M.J. Santi
With the full implementation of Superpave mix design in the State of Idaho, a performance parameter, referred to as the Gyratory Stability, has been developed. It is calculated from the accumulated shear energy in the mix during compaction. Results of the Gyratory Stability (GS) of thirteen tested mixes from the lab and field compared well with various performance indicators. Performance evaluation of these mixes was conducted using Asphalt Pavement Analyzer (APA), Dynamic Modulus (E*) and the Flow Number (FN). The GS results showed good correlation with rut-depth measured in APA and with E*, phase angle and the FN parameters measured in the Superpave Performance Tester (SPT).
The results also showed that GS was more sensitive to the changes in mix design parameters.
Overall, the results indicate that GS has the potential to be used as a screening tool for Hot- Mix Asphalt design and as a quality control indicator onsite.
