Dynamic Modules And Static Modules Research Of Asphalt Mixtures Based On Admixture Technology And The Related Properties Study

The static moduls of asphalt mixtures is closely linked with its performance in hightemperature and low temperature; there are many kind of additives to improve the performanceof asphalt mixtures. However, in terms of the correlation between additive and modulus is lackof systematic research. In addition, the current method of static design can not accurately reflectthe ture force condition of asphalt mixtures which maybe received by repeated action of vehicleload, climate and hydrology in actual work. There is much difference on the mechanical modeland material parameters in actual situation; it limits the development of the pavement structuredesign in a certain extent. From the current point of view, the situation can be improved by usingdynamic parameters, so the tendency of the pavement structure design from static state todynamic will be reasonable. Judging from this way, it is necessary and meaningful of theresearch about dynamic modulus.The thesis firstly conducted the static modulus experiment of the asphalt mixtures withAnti-rutting Additive, new Xiang Wei Lian and PR.M in different temperature regions.According to the experiment results, the thesis analysed the variation of the static modulus andrebound in different temperatures, to determine the applicability of three kind of admixtures forasphalt mixtures in different temperature regions based on which improve effectiveness of staticmodulus.Secondly, the thesis conducted the dynamic modulus experiment of asphalt mixtures indifferent temperatures and different frequencies analysed the effect of temperature, frequencyand admixture on dynamic modulus and phase angle. According to the experiment result, thethesis analysed the correlation among dynamic modulus, static modulus, temperature andfrequency by SPSS software, the dynamic modulus in different conditions can be approximatelycalculated in line with the dynamic modulus regression formulas of different asphalt mixtures.Then, the correlation between performance and modulus was verified according to results ofperformance experiments and modulus experiments.Finally, the thesis conducted uniaxial static creep experiments, and analysed the influenceof different admixtures to viscoelastic properties and creep stiffness modulus based on the experiment result.