Performance of Asphalt Rubber Mixture Overlays to Mitigate Reflective Cracking

被引：7

作者：

Thives, Liseane Padilha ^{[1
]}

Pais, Jorge C. ^{[2
]}

Pereira, Paulo A. A. ^{[2
]}

Minhoto, Manuel C. ^{[3
]}

Triches, Glicerio ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, Dept Civil Engn, BR-88037000 Florianopolis, SC, Brazil

[2] Univ Minho, Dept Civil Engn, Campus Azurem, P-48000058 Guimaraes, Portugal

[3] Inst Politecn Braganca, Dept Civil Engn, P-5300253 Braganca, Portugal

来源：

MATERIALS | 2022年 / 15卷 / 07期

关键词：

asphalt rubber; reflective cracking; numerical simulation; PROPAGATION;

D O I：

10.3390/ma15072375

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 element method was accomplished to estimate the von Mises 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.

引用

页数：17

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