Abstract
AbstractThis research investigates the influence of fines quality on the fatigue performance of asphalt mastic by laboratory testing since mastic is the primary binding component in asphalt mixes. We examined six different mineral fines (grain size smaller than 125 μm) regarding their true density for this study and carried out a sieve analysis down to 0.002 mm. Furthermore, the BET-surface, the Rigden void, and the grain shape through dynamic image analysis of the fines were determined. Twelve different asphalt mastics were prepared with unmodified and modified asphalt binders and the six fines to explore these parameters’ influence on fatigue performance. The fatigue performance of the asphalt mastic was tested with a dynamic shear rheometer (DSR). We selected a stress-controlled time sweep test with hyperbolic specimen shape for fatigue tests on DSR. From the data obtained, it can be concluded that the BET-surface and the Rigden void impact the fatigue performance of asphalt mastic, deduced by a simple linear regression model. A correlation between the other tested parameters and fatigue performance of asphalt mastic could not be established.KeywordsFatigueDSRAsphalt masticMaterial properties
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