CAJ | 학술논문

为了在全频范围内研究沥青混合料的粘弹特性,采用动态剪切流变仪对沥青混合料进行连续动态频率扫描,得到温度一频率一动态模量的三维关系.利用时温等效原理,将频率扫描试验得到的三维关系进行温一频转换,获得了跨越15个数量级的动态模量随频率变化的二维全频主曲线.基于试验所得到的全频主曲线,利用CAM流变模型对几种沥青混合料的流变性能进行了比较分析.结果表明,动态流变试验是获得沥青混合料全温全频主曲线的有效方法,基于全频域的CAM模型能够很好地描述沥青混合料的粘弹变形特性.
위료재전빈범위내연구력청혼합료적점탄특성,채용동태전절류변의대력청혼합료진행련속동태빈솔소묘,득도온도일빈솔일동태모량적삼유관계.이용시온등효원리,장빈솔소묘시험득도적삼유관계진행온일빈전환,획득료과월15개수량급적동태모량수빈솔변화적이유전빈주곡선.기우시험소득도적전빈주곡선,이용CAM류변모형대궤충력청혼합료적류변성능진행료비교분석.결과표명,동태류변시험시획득력청혼합료전온전빈주곡선적유효방법,기우전빈역적CAM모형능구흔호지묘술력청혼합료적점탄변형특성.
In order to study the viscoelastic characteristics of asphalt mixtures in the whole-frequency range, a dynamic shearing rheometer is used to carry out dynamic frequency sweeps for asphalt mixtures, which obtains the three-dimensional relationships among G*, temperature and frequency. Then the time-temperature shift principle is used to translate the relationships from three dimensions to two dimensions, so master curves are obtained regarding dynamic modules changing along with the frequency over 15 amount levels. The Christensen-Anderson-Marasteanu (CAM) model, a kind of the theological model, is used to analyze and compare theological performances of several asphalt mixtures based on the obtained master curves. The results indicate that the dynamic rheological test is an effective method for obtaining the master curve. Besides, the CAM model can describe well the viscoelastic deformation characteristics of asphalt mixtures.