發(fā)布時間：2018-04-13 03:22

  本文選題：硬質(zhì)瀝青 + 回彈模量��； 參考：《科學(xué)技術(shù)與工程》2014年05期

【摘要】：采用針入度為10/20的硬質(zhì)瀝青和石灰?guī)r集料制備高模量瀝青混合料,同時選擇了一種PG76—22的SBS改性瀝青,進行性能對比�；�于體積法的配合比設(shè)計完成后,采用馬歇爾穩(wěn)定度試驗、車轍試驗、三點彎曲試驗、間接拉伸試驗來評價硬質(zhì)瀝青混合料的高溫性能、低溫性能和水穩(wěn)定性。靜態(tài)回彈模量與動態(tài)復(fù)數(shù)模量均采用單軸壓縮試驗來完成,采用不同的加載模式,回彈模量采用7級靜態(tài)加載,復(fù)數(shù)模量采用不同頻率的正弦波動態(tài)加載。深入研究了溫度對兩種模量的影響�；�于反曲函數(shù)繪制了動態(tài)模量主曲線,同時采用Cole-Cole平面分析硬質(zhì)瀝青混合料的黏彈特征。研究認為,硬質(zhì)瀝青可以制備抗車轍性能優(yōu)異的高模量瀝青混合料,相同溫度下,硬質(zhì)瀝青混合料的復(fù)數(shù)模量均高于SBS改性瀝青混合料,但37.8℃以上溫度時,硬質(zhì)瀝青混合料的黏性流動比例較大。
[Abstract]:High modulus asphalt mixture was prepared by using hard asphalt and limestone aggregate with penetration of 10 / 20, and a SBS modified asphalt with PG76-22 was selected for performance comparison.Marshall stability test, rutting test, three-point bending test and indirect tensile test were used to evaluate the high temperature, low temperature and water stability of hard asphalt mixture.The static modulus of springback and the dynamic modulus of complex modulus are completed by uniaxial compression test. Different loading modes are adopted. The modulus of springback is statically loaded by 7 stages and the complex modulus is loaded dynamically by sine wave with different frequencies.The effect of temperature on the two moduli was studied.Based on the inverse function, the main curve of dynamic modulus is drawn, and the viscoelastic characteristics of hard asphalt mixture are analyzed by Cole-Cole plane.The study shows that hard asphalt can be used to prepare high modulus asphalt mixture with excellent rutting resistance. At the same temperature, the complex modulus of hard asphalt mixture is higher than that of SBS modified asphalt mixture, but above 37.8 鈩，

本文編號：1742706