橡胶沥青老化方法研究  

Study on the aging method of rubber-modified asphalt

作　　者：李宁利[1,2] 赵新坡[3] 张彩利[1] 孙吉书[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [3]天津高速公路集团有限公司,天津300384

出　　处：《河北工业大学学报》2014年第3期96-99,共4页Journal of Hebei University of Technology

基　　金：高等学校博士学科点专项科研基金(20101317120007);特殊地区公路工程教育部重点实验室开放基金(CHD2011SY003);河北省自然科学基金(E2012202161)

摘　　要：橡胶沥青的施工温度远远高于普通沥青,现有普通沥青的老化方法已经不适用于橡胶沥青,现阶段有必要提出适合橡胶沥青的老化方法.基于改进的普通沥青RTFOT老化试验方法,采用正交试验设计,通过提高RTFOT试验中的试验温度或延长试样的老化时间,得到各种不同老化程度的橡胶沥青,并与实际摊铺完毕的橡胶沥青进行性能对比,从而确定橡胶沥青短期老化的试验温度和试验时间.试验结果表明,橡胶沥青RTFOT试验应采用试验温度180℃,老化时间95min.该试验结果通过与实际工程比对得到,能够真实准确地体现工程实际情况.The temperature of rubber-modified asphalt in the construction process is much higher than that of the base asphalt. Aging test method of base asphalt has been unable to meet the requirement of rubber-modified asphalt. It is necessary to propose the suitable aging test of rubber-modified asphalt. Based on the existing aging method and using orthogonal design, the aging temperature is increased or the aging time is extended in the RTFOT test. Then, all kinds of different aging degree of rubber-modified asphalts are obtained. Against the paved rubber-modified asphalt in practical engineering, the aging temperature and the aging time of the rubber-modified asphalt short-term aging are determined. The test results show that the aging temperature of rubber-modified asphalt RTFOT test should be 180 ℃, the aging time should be 95 mi- nutes. The test results are obtained by comparison with the actual project and can accurately reflect the practical engineering.

关 键 词：橡胶沥青 老化方法 正交试验设计 RTFOT 

分 类 号：U414.75[交通运输工程—道路与铁道工程]