【摘要】：為了提出瀝青混合料紫外光老化評價指標(biāo),通過瀝青砂來研究瀝青混合料的流變特性,制作瀝青砂試件進(jìn)行室內(nèi)加速紫外光老化試驗,分別進(jìn)行0、2、4、6、8、12個月的紫外光老化。對老化的試件在恒定荷載0.1 MPa的作用下,保持恒定溫度20℃進(jìn)行單軸壓縮蠕變試驗,得到應(yīng)變-時間關(guān)系曲線。采用Burgers模型描述瀝青砂的流變性能,并根據(jù)應(yīng)變-時間關(guān)系進(jìn)行Burgers模型4參數(shù)的擬合,擬合得到不同老化時間對應(yīng)的黏彈性參數(shù)值,對該值進(jìn)行擬合,得到黏彈性參數(shù)和老化程度的關(guān)系式E1(h)、E2(h)、η1(h)、η2(h),把該表達(dá)式代入Burgers模型的本構(gòu)方程表達(dá)的蠕變?nèi)崃糠匠讨械玫饺渥內(nèi)崃縅(t)和老化時間的關(guān)系式J(h,t),提出用J(h,1 200 s)作為瀝青混合料紫外光老化的評價指標(biāo)。
[Abstract]:In order to put forward the evaluation index of ultraviolet aging of asphalt mixture, the rheological properties of asphalt mixture were studied by asphalt sand. The accelerated ultraviolet aging test of asphalt mixture was carried out for 0, 2, 4, 6, 8 and 12 months respectively. The strain-time relationship curve was obtained by uniaxial compression creep test at constant temperature of 20 鈩，

本文編號：2455159