纤维沥青混凝土改性机理的分形研究

Fractal Study of Fiber Asphalt Concrete Modified Mechanism

纤维究竟对沥青混合料产生多大的影响,特别是其低温抗裂性能,长期以来一直未有定量的评论。研究表明,纤维沥青混凝土在低温荷载作用下,裂缝的生成和扩展具有比较明显的分形特征。因此,借助分形理论和分形维数对其进行研究具有一定的理论价值。现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,通过与未掺纤维的沥青混凝土的低温时裂缝的发展对比研究,论证裂缝分形维数的影响因素及其所反映的信息,为纤维沥青混凝土的研究提供了一条新的思路。

There is no quantitative comment on the influence of fiber on the asphalt mixture, especially its low-temperature crack resistance for a long time. The study shows that the crack formation and expansion of fiber asphalt concrete have the more obvious fractal feature under the low temperature load. Therefore, its study has a certain theoretical value by the help of fractal theory and fractal dimension. The fractal dimension is applied to study the crack growth of fiber asphalt concrete at low temperature. According to the comparison and study of the crack development of asphalt concrete without fiber at low temperature, the article proves the influence factor and its reflective information of crack fractal dimension, which provides a new idea for the study of fiber asphalt concrete.