Abstract: It?is?researched?that?the?fiber?can?inhibit?asphalt?concrete?cracking?and?the?fiber?asphalt?concrete?cracks?possess?fractal?characteristics.?Therefore,?through?the?observation?of?asphalt?concrete?cracking?of?different?fiber?content?under?the?effect?of?temperature?and?load?and?the?extraction?of?comes-ponding?crack?distribation,?the?fractal?dimension?is?adopted?to?study?the?growth?of?the?fiber?asphalt?concrete?at?low?temperature?and?establish?the?relationships?among?temperature,?load?and?fractal?dimension.?The?process?of?generating?and?expanding?of?fiber?asphalt?concrete?cracking?can?be?verified?by?the?change?law?of?fraetal?dimension,?which?provides?a?new?thought?to?research?the?cracking?of?fiber?asphalt?concrete.

Key words: fiber asphalt concrete , cracking at low temperature , cracking extraction , fraetal features , fraetal dimension

摘要： 纤维对沥青混凝土裂缝具有抑制作用,同时,纤维沥青混凝土开裂具有分形特征,为此,通过观察在温度、荷 载作用下不同纤维含量的沥青混凝土的开裂情况并提取相应的裂缝分布,应用分形维数来研究纤维沥青混凝土在 低温时裂缝的生长情况,建立温度、荷载与分形维数之间的关系,从而通过分形维数的变化规律,描述纤维沥青混 凝土裂缝生成及扩展过程,为纤维沥青混凝土的开裂研究提供了一种新的思路。

关键词: 纤维沥青混凝土, 低温开裂, 裂缝提取, 分形特征, 分形维数