Double-edge-notched tension testing of asphalt mastics

Asphalt cements were tested in double-edge-notched tension geometries, straight and modified with different fillers at a range of rates and temperatures. Master curves for the essential works (we), plastic works (βwp), and approximate critical crack tip opening displacements were compared. Results for mastics obtained with a single small ligament length were found to be highly correlated with those obtained through the essential work of failure analysis suggesting that under certain circumstances it may be possible to simplify the analysis. Significant rate and temperature effects were found with slower rates and higher temperatures being more discriminating.