Pre-Assumption of Final Results of the Asphalt Four-Point Flexing-Beam Fatigue Test

Abstract

In this article an interpretation of four-point bending fatigue test results are
discussed. This test needs a long time to per-form, but during the process,
knowing the cycles – stiffness function, we can assume the final result of
the test. In our laboratory we have performed the fatigue test on some
mixtures to the failure (50% of the initial stiffness), and examined the
precision of the pre-assumption of the result, if we use only limited range
of the specimens’ cycles – stiffness function. We can do this because a
linear line can be laid onto the cycles vs. stiffness diagram, so we can
extrapolate to the failure of each specimen. The inaccuracy of unique
specimens’ cycles to failure has low effect on the final result of the test.