Application of retardation time spectra of asphalt |
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Authors: | ZHAN Xiao-li ZHANG Xiao-ning LU Liang |
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Affiliation: | 1. School of Traffic Science and Engineering,Harbin Institute of Technology,Harbin 150090,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China 2. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China |
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Abstract: | To improve the performance of asphah pavement,the dynamic and static tests of asphalt were used to measure its viscoelastic properties under different time.Based on the obtained data of static creep compliances and dynamic compliances according to the static creep test and dynamic test of asphalt using the dynamic shear rheometer,the discrete retardation time spectra were attained using the non-linear regression method.All viseoelastic functions are mathematically equivalent and belong to the same retardation time spectra,so the dynamic compliances of asphalt were converted to the static creep compliance using the retardation time spectra.Good correlations were found betwin calculation results and measurement results.In accordalice to these findings,the retardation time spectra can accurately transform static and dynamic viscoelastic functions.Therefore,we can obtain viscoelastic properties over much larger time or frequency region than measurement results. |
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Keywords: | viscoelastic properties of asphalt retardation time spectra non-linear regression creep compliance dynamic compliance |
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