發(fā)布時(shí)間：2018-03-25 10:58

  本文選題：瀝青混合料　切入點(diǎn)：黏彈性動(dòng)態(tài)響應(yīng)　出處：《公路》2017年05期

【摘要】：選擇3種瀝青混合料進(jìn)行不同試驗(yàn)條件下的瀝青混合料性能試驗(yàn)(AMPT),分析了加載頻率及試驗(yàn)溫度對(duì)瀝青混合料黏彈性動(dòng)態(tài)響應(yīng)的影響;并采用Sigmoidal模型,得到了瀝青混合料的動(dòng)態(tài)模量移位因子及模型參數(shù),形成并分析了瀝青混合料動(dòng)態(tài)模量和相位角主曲線。結(jié)果表明,隨著加載頻率的升高,瀝青混合料的動(dòng)態(tài)模量逐漸增大,但溫度越高,增加幅度越小;動(dòng)態(tài)模量隨著加載頻率增大,在較低的溫度下(5℃和15℃)符合對(duì)數(shù)增長(zhǎng)關(guān)系,在較高的溫度下(45℃和55℃)符合線性增長(zhǎng)關(guān)系,但超過45℃后,不同加載頻率的動(dòng)態(tài)模量差異較小。不同加載頻率的相位角最大值對(duì)應(yīng)的溫度不同,加載頻率越低,對(duì)應(yīng)的溫度也越低。動(dòng)態(tài)模量主曲線和移位因子可以較好地描述加載頻率和試驗(yàn)溫度對(duì)瀝青混合料黏彈性動(dòng)態(tài)響應(yīng)的影響。在低溫高頻狀態(tài)下,礦料級(jí)配對(duì)瀝青混合料動(dòng)態(tài)模量的貢獻(xiàn)較大;而在高溫低頻狀態(tài)下,瀝青逐漸軟化,結(jié)合料對(duì)混合料動(dòng)態(tài)模量的影響更為顯著。
[Abstract]:In this paper, three kinds of asphalt mixture are selected to test the performance of asphalt mixture under different test conditions, and the influence of loading frequency and test temperature on the dynamic response of asphalt mixture is analyzed, and the Sigmoidal model is used to analyze the effect of loading frequency and test temperature on the viscoelastic dynamic response of asphalt mixture. The dynamic modulus shift factor and model parameters of asphalt mixture are obtained, and the main curves of dynamic modulus and phase angle of asphalt mixture are formed and analyzed. The results show that the dynamic modulus of asphalt mixture increases with the increase of loading frequency. But the higher the temperature, the smaller the increasing amplitude, the more the loading frequency, the logarithmic increase of dynamic modulus at lower temperature (5 鈩，

本文編號(hào)：1662822