Study of Low Temperature Cracking of Asphalt Pavement Based on Cohesive Zone Model

A bilinear cohesive zone model is introduced to analyze the initiation and propagation of the low temperature crack of asphalt pavement. The process of the low temperature cracking of asphalt pavement was analyzed using the bilinear cohesive zone model and influence of the cohesion parameters and surface structural parameters on low temperature cracking is discussed. Results indicate that: 1) the pavement surface experiences a process from material damage to fracture with a drop in temperature; 2) when the temperature drop is relatively small, there are no macro-cracks in the pavement; 3) when the temperature drop increases to a certain value, the asphalt pavement experiences brittle fracture and macro-cracks appear; 4) increasing the fracture energy reduces the degree of damage, the damage depth, and the fracture temperature of the asphalt pavement so as to delay the fracture of the pavement; 5) increasing the cohesive strength can effectively reduce the damage degree and the damage depth as compared with increasing the fracture energy; 6) reducing the Young's modulus and the temperature contraction coefficient of the surface can reduce the extent of damage of the road surface effectively.

Language

  • Chinese

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Filing Info

  • Accession Number: 01152145
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 10 2010 4:03PM