基于表观黏度的橡胶沥青老化动力学  

Aging kinetics of asphalt rubber based on apparent viscosity

作　　者：李宁利[1,2] 赵新坡[3] 孙吉书[1] 张彩利[1] 耿九光[4] 

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064 [3]天津高速公路集团有限公司,天津300384 [4]长安大学材料科学与工程学院,西安710064

出　　处：《合成橡胶工业》2016年第3期229-233,共5页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51108374);高等学校博士学科点专项科研基金资助项目(20101317120007);特殊地区公路工程教育部重点实验室开放基金资助项目(CHD 2011 SY 003);河北省自然科学基金资助项目(E 2012202161)

摘　　要：利用2种废旧轮胎胶粉改性基质沥青制得橡胶沥青(SK、PJ),考察了老化程度对橡胶沥青表观黏度的影响,并以表观黏度为参数建立了橡胶沥青老化动力学模型。结果表明,随着老化时间的延长或老化温度的升高,2种橡胶沥青的表观黏度均增大,且在同一老化时间下,橡胶沥青的表观黏度与老化温度基本呈线性增长关系;SK橡胶沥青比PJ橡胶沥青具有更好的抗老化性;橡胶沥青的老化遵循一级反应动力学方程,模型计算值与试验值吻合较好,说明模型与橡胶沥青老化的实际过程相符。The asphalt rubber （ SK, PJ） were pre- pared with two kinds of asphalt modified by waste tire rubber powder. Effect of aging degree on the ap- parent viscosity of asphalt rubber was investigated, and the aging kinetics model of asphalt rubber was established based on the apparent viscosity. The re- sults showed that the apparent viscosity of the two kinds of asphalt rubber increased with the increase of the aging time or the aging temperature, and there was a linear growth relationship between the appar- ent viscosity and aging temperature of asphalt rubberwhen the aging time was constant. Aging resistance of SK asphalt rubber was better than that of PJ as- phalt rubber. The aging of asphalt rubber followed the first order reaction kinetics equation. The calcu- lated values of the model were tally with the experi- mental ones, which indicated that the model was consistent with the actual process of asphalt rubber aging.

关 键 词：废旧轮胎胶粉 改性 沥青 表观黏度 老化动力学 

分 类 号：TQ330.14[化学工程—橡胶工业]