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Advisor(s)
Abstract(s)
Adequately predicting overlay behaviour is essential for flexible pavement rehabilitation to
reach the predicted lifespan. Reflective cracking is one of the main failure mechanisms affecting overlay
performance. This failure may occur due to cracks in the lower layers that propagate to the overlay
due to traffic loads, temperature variations, shrinkage cracking of cement-treated layers, and subgrade
movements. This work aims to assess the reflective cracking phenomenon of asphalt rubber mixtures as
an overlay through laboratory tests and numerical simulation. Four-point bending equipment and the
reflective crack device were used to perform the laboratory tests. A numerical simulation through the
finite elementmethodwas accomplished to estimate the vonMises strain and develop reflective cracking
fatigue laws. The results showed that the asphalt rubber mixtures are suitable for extending overlay
lifespan considering reflective cracking. The evaluated asphalt rubber mixtures presented reflective
cracking resistance almost eight times greater than the conventional ones.
Description
Keywords
Asphalt rubber Reflective cracking Numerical simulation
Citation
Thives, Liseane Padilha; Pais, Jorge C.; Pereira, Paulo A.A.; Minhoto, Manuel; Trichês, Glicério (2022). Performance of asphalt rubber mixture overlays to mitigate reflective cracking. Materials. EISSN 1996-1944. 15:7, p. 1-17
Publisher
MDPI