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Analysis on Effect Factors of Rutting Performance

Libo Gao, Zheren Wang, Changning Deng, Jian‐Wen Shi

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Abstract

Rutting has become the most common form of damage to expressway pavement. However, rutting has not been taken into account in the pavement design in China. Effect factors of pavement rutting were analyzed by using the 3-D FEM (finite element method) and pavement experimental research. The results show that the middle surface of the asphalt pavement is the main structural layer which causes flow rutting and it is controlled by shear strain in h. temp. season. Vehicle overload is the major factor which causes flow rutting in the middle and lower surface. The shear stress at the bottom of the asphalt layer in a semi-rigid base pavement is 136% bigger than the one in a flexible base pavement. Computing results indicated that the method applied in this paper is feasible and consistent with engineering. The conclusion drawn is available in practice.

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What this paper is about

Rutting has become the most common form of damage to expressway pavement. However, rutting has not been taken into account in the pavement design in China. Effect factors of pavement rutting were analyzed by using the 3-D FEM (finite element method) and pavement experimental research. The results show that the middle surface of the asphalt pavement is the main structural layer which causes flow rutting and it is controlled by shear strain in h. temp. season. Vehicle overload is the major factor which causes flow rutting in the middle and lower surface. The shear stress at the bottom of the asphalt layer in a semi-rigid base pavement is 136% bigger than the one in a flexible base pavement. Computing results indicated that the method applied in this paper is feasible and consistent with engineering. The conclusion drawn is available in practice.

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Available abstract

Rutting has become the most common form of damage to expressway pavement. However, rutting has not been taken into account in the pavement design in China. Effect factors of pavement rutting were analyzed by using the 3-D FEM (finite element method) and pavement experimental research. The results show that the middle surface of the asphalt pavement is the main structural layer which causes flow rutting and it is controlled by shear strain in h. temp. season. Vehicle overload is the major factor which causes flow rutting in the middle and lower surface. The shear stress at the bottom of the asphalt layer in a semi-rigid base pavement is 136% bigger than the one in a flexible base pavement. Computing results indicated that the method applied in this paper is feasible and consistent with engineering. The conclusion drawn is available in practice.

Key concepts: Rut, Asphalt pavement, Asphalt, Finite element method, Geotechnical engineering, Shear (geology), Shear stress, Engineering

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