摘要Nonlinear characteristics of road mineral material and the fractal dimension of grain size distribution, including D (fractal dimension of whole aggregate), Dc (fractal dimension of coarse aggregate) and Df(fractal dimension of fine aggregate) are used as indexes to describe fractal characteristics. Additionally, the formula of fractal gradation theory is put forward, and the correlation with the performance of the mixture is evaluated. Results show that the fine aggregate of 2.36 mm size has a considerable influence on the physical and mechanical properties of cold recycled pavement base mixture with foamed asphalt. The fractal of the continuous-graded aggregate is one dimensional, while the fractal of the gap-graded aggregate is two dimensional. The fractal dimension of the aggregate volume has good applicability as the evaluation index of cold recycled pavement base with foamed asphalt. When the corresponding regression model is established, a strong correlation is also observed between the fractal dimension of the aggregate volume and the indexes of the physical, mechanical, and durable properties of the cold recycled pavement base with foamed asphalt. The fractal dimension of the aggregate volume is an important parameter with rich information content, and fractal is an essential character of the aggregate.
Abstract：Nonlinear characteristics of road mineral material and the fractal dimension of grain size distribution, including D (fractal dimension of whole aggregate), Dc (fractal dimension of coarse aggregate) and Df(fractal dimension of fine aggregate) are used as indexes to describe fractal characteristics. Additionally, the formula of fractal gradation theory is put forward, and the correlation with the performance of the mixture is evaluated. Results show that the fine aggregate of 2.36 mm size has a considerable influence on the physical and mechanical properties of cold recycled pavement base mixture with foamed asphalt. The fractal of the continuous-graded aggregate is one dimensional, while the fractal of the gap-graded aggregate is two dimensional. The fractal dimension of the aggregate volume has good applicability as the evaluation index of cold recycled pavement base with foamed asphalt. When the corresponding regression model is established, a strong correlation is also observed between the fractal dimension of the aggregate volume and the indexes of the physical, mechanical, and durable properties of the cold recycled pavement base with foamed asphalt. The fractal dimension of the aggregate volume is an important parameter with rich information content, and fractal is an essential character of the aggregate.
陈龙, 何兆益, 陈宏斌. 基于分维度指标的泡沫沥青冷再生基层路用性能研究[J]. Journal of Highway and Transportation Research and Development, 2016, 10(3): 8-12.
CHEN Long, HE Zhao-yi, CHEN Hong-bin. Road Performance Research on Cold Recycled Pavement Base with Foamed Asphalt on the Basis of Fractal Dimension. Journal of Highway and Transportation Research and Development, 2016, 10(3): 8-12.
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2016, Vol. 10 
