A Double-Parameter K~J Fracture Criterion for Epoxy Asphalt Concrete
The epoxy asphalt concrete is extensively used as paving material for long-span steel bridges in China. But mode I crack, which is most prominent cracking pattern for the pavement, often appears on the pavement surface. Therefore, the stress intensity factor K and J-integral were adopted to analyze fracture properties of single-edge notched three-point bending beams. The influence of temperature on the two parameters was studied. The analyses indicate epoxy asphalt concrete exhibits ductile fracture property at 5~25°C and brittle fracture property at -15~5°C. It is also found that fracture property of epoxy asphalt concrete is better than other kinds of bituminous concrete. Finally, a double-parameter K~J fracture criterion is founded for the epoxy asphalt concrete and provides basis for anti-cracking design and repair of cracks of the pavement.
Zhengyi Jiang and Chunliang Zhang
Z. D. Qian et al., "A Double-Parameter K~J Fracture Criterion for Epoxy Asphalt Concrete", Advanced Materials Research, Vols. 97-101, pp. 809-813, 2010