發(fā)布時(shí)間：2018-01-25 13:49

  本文關(guān)鍵詞： 改性瀝青 瀝青混合料 動(dòng)態(tài)剪切流變儀(DSR) 動(dòng)態(tài)黏彈性能 流變主曲線　出處：《東南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年02期 　論文類型：期刊論文

【摘要】：為了在相似加載條件下比較改性瀝青及混合料的動(dòng)態(tài)黏彈性能,選擇4種不同特點(diǎn)的改性瀝青,成型了混合料小梁試件.應(yīng)用動(dòng)態(tài)剪切流變儀(DSR)分別進(jìn)行了不同溫度下的頻率掃描試驗(yàn),根據(jù)時(shí)間-溫度等效原理構(gòu)建了改性瀝青及混合料的流變主曲線,對主曲線形態(tài)和流變模型擬合結(jié)果進(jìn)行了對比分析.研究表明:改性瀝青及混合料的復(fù)數(shù)剪切模量主曲線形態(tài)相似,采用改進(jìn)型CAM模型進(jìn)行擬合的效果很好,相關(guān)系數(shù)在0.996以上;平衡復(fù)數(shù)剪切模量G*e可用來區(qū)分不同類型改性瀝青及其混合料的高溫性能;高強(qiáng)改性瀝青的高溫抗車轍性能明顯優(yōu)于其他改性瀝青,但軟化點(diǎn)和60℃動(dòng)力黏度不適用于評價(jià)高強(qiáng)改性瀝青.改性瀝青的動(dòng)態(tài)力學(xué)響應(yīng)能夠反映其混合料的黏彈性能.
[Abstract]:In order to compare the dynamic viscoelasticity of modified asphalt and mixture under similar loading conditions, four kinds of modified asphalt with different characteristics were selected. The mixture trabeculae were formed and the frequency scanning tests at different temperatures were carried out by using dynamic shear rheometer (DSRs). According to the principle of time-temperature equivalence, the rheological principal curve of modified asphalt and its mixture was constructed. The main curve morphology and rheological model fitting results are compared and analyzed. The results show that the complex shear modulus of modified asphalt and mixture are similar. The effect of modified CAM model is very good, the correlation coefficient is above 0.996; The equilibrium complex shear modulus (GUE) can be used to distinguish the high temperature properties of different types of modified asphalt and its mixture. High strength modified asphalt is superior to other modified asphalt in rutting resistance at high temperature. But the softening point and the dynamic viscosity at 60 鈩，

本文編號：1462987