Prediction of Design Parameters for SUPERPAVE Mixtures Basedon the Fractal Law of Aggregate Gradation

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Prediction of Design Parameters for SUPERPAVE Mixtures Basedon the Fractal Law of Aggregate Gradation

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[1]LIU Jianxun,LI Bo.Prediction of Design Parameters for SUPERPAVE Mixtures Basedon the Fractal Law of Aggregate Gradation[J].Journal of Zhengzhou University (Engineering Science),2010,31(01):29-.

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 31 Number of periods: 2010 01 Page number: 29- Column: Public date: 2010-01-30

Title:: Prediction of Design Parameters for SUPERPAVE Mixtures Basedon the Fractal Law of Aggregate Gradation

Author(s):: LIU Jianxun; LI Bo; 1．School of Highway Engineering，Chang’an University，Xi’an 710064。China；2．Oansu Road and Bridge Construction GroupCo．Ltd．，Lanzhou 730030，China；3．School of Civil Engineering，Lanzhou Jiaotong University，Lanzhou 730070。China

Keywords:: pavement engineering; fractal dimension; SUPERPAVE mixture; design parameter; prediction

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Abstract:: The fractal model of aggregates in Supepave mixture was deduced based on the theory of fractal ge—ometry．By taking SUPERPAVE-19 as an example，the relationship between the fractal dimension(D)and de—sign parameter was stadied by testing volume parameter of mixtures．Base on this，the design parameters ofmixtures were predicted．The results show that aggregate gradation of SUPERPAVE mixture has fractal charac·teristie too，The fractal dimension has good linear correlation with voids in mineral aggregate，voids filled withasphalt，initial compaction degree and asphalt content．The design parameters of SUPERPAVE mixtures withdifferent D can be estimated accordingly．The fraetal characteristics of SUPERPAVE mixtures will make designmethod of asphalt mixtures more objective．

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