Results of a comprehensive lab evaluation on asphalt and pavement mixes containing conventional and engineered paving binders are presented. Model pavement structures were constructed and tested under full-scale dynamic loads and high temperatures simulating field conditions for rutting evaluation. Pavement rutting was monitored over hundreds of thousands of load cycles simulating long term performance. Fatigue testing was also carried out and similarly monitored over hundreds of thousands of load cycles. Comparative results on pavement temperature susceptibility and low temperature behaviour of various conventional and engineered asphalt mixes are presented. Pavement temperature susceptibility is temperature susceptibility is evaluated by determination of resilient moduli (Mr) at various test temperatures. Low-temperature performance is evaluated by determination of pavement stiffness values derived from direct tension tests carried out at very slow speeds. Conventional physical properties and the SHRP performance characteristics on test asphalts are presented and discussed in relation to actual measured (A)
Samenvatting