| Summary: | 博士 === 國立成功大學 === 土木工程學系 === 104 === Gussasphalt (Guss) is mainly used in the steel deck bridge, of which designed goals are the high fluidity and zero porosity to protect steel deck . The strength of Guss is mainly related to asphalt mastic. Therefore, this study firstly focused on Guss paste to investigate its basic properties, and then stimulated the aging effect on its mixing in the lab in order to implement the basic engineering property testing and strain-controlled fatigue testing for Guss. In addition, the results of the high-temperature rutting analysis and the fatigue life definition could be provided as the reference for the pavement material and construction specifications for Guss.
The research results of Guss paste indicated that the increase of Trinidad Lake Asphalt (T.L.A.) and aggregate content and the aging effect resulted from the mixing time would increase the stiffness of mastic; however, the aging effect on the phase angle was more significant than T.L.A. and aggregate content to the phase angle. Moreover, different types of asphalt were applied to be the binding materials to mix with T.L.A., and there’re several differences existed in the paste properties. The study results of Gussasphalt showed that differences in temperature and asphalt content had high sensibility to Guss fluidity, and the asphalt content had a significant effect on the dynamic stability. Furthermore, the results of fatigue test showed that Guss’s fatigue life was longer than traditional asphalt mixtures. In terms of defining fatigue life, it should be based on the definition of traditional fatigue life and stiffness change curve to obtain a consistent fatigue life. The actual engineering case, Guoxing Bridge of National Freeway No. 6, is adopted as the subject for analysis and investigation, in order to propose the explanation and introduction to domestic Guss material property, mix design and engineering technology, as references to the engineering specifications of current Guss construction.
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