橡胶沥青及其老化特性研究.pdf

学、第16卷第2期
建筑材料学报
2013年4月
JOURNAL OF BUILDING MATERIALS
文章编号:1007-9629(2013)02-0370-05
橡胶沥青及其老化特性研究
何亮,马育2,马涛
1.重庆交通大学土木建筑学院,重庆400074;2.重庆交通大学理学院,
重庆400074;3.东南大学交通学院,江苏南京210096)
摘要:制作了普邇橡胶沥青和脱硫橡胶沥青,并进行了橡胶颗粒影响、测力延度和老化性能试验
结果表明:经过高遠剪切エ艺,大颗粒的脱硫橡胶粒在沥青里大多分散成细小颗粒,而普通橡胶粉
剪切后基本保持原有颗粒核心,在老化过程中,橡胶颗粒核心有较强的继续溶胀反应,这导致普通
橡胶沥青的一些流变性指标与基质沥青老化趋势相反,此反应在薄膜加热试验(TFOT)短期老化
下尤为明显.脱硫橡胶沥青的路用性能和抗老化性能优于基质沥青,但均不如普通橡胶沥青
关键词:橡胶沥青;脱碗櫲胶沥青;老化特性;测力延度
中图分类号:U416.217
文獻标志码:A
doi:10.3969/.issn.1007-9629.2013.02.035
Research on Asphalt Rubber and Its Aging Performance
HE Liang, MA Yu, MA Tao
(1. School of Civil Engineering and Architecture, Chongging Jiaotong University, Chongqing 400074, China;
2. School of Sciences, Chongqing Jiaotong University, Chongging 400074, China;
3. School of Transportation, Southeast University, Nanjing 210096, China)
Abstract: Asphalt rubber(AR) and desulfurized rubber asphalt(DRA) were prepared, and rubber particle
size effects test, force ductility test and aging test were conducted. The experimental results show that
during a high-speed shearing process, the large sizes of desulfurized crumb rubber particles are shredded
into small ones, and dispersed into the asphalt, but the ordinary crumb rubber almost keeps their particle
cores. During the aging process, the asphalt rubber particles have a stronger response to swelling, which
will lead to some rheology indicators of AR contrary to that of asphalt aging. This effect is particularly evi
dent in thin film oven test(TFOT) short-term aging. Both pavement performance and aging resistance of
DRA are better than that of asphalt, but not as good as AR.
Key words: asphalt rubber(AR); desulfurized rubber asphalt(DRA); aging performance; force-ducti
lity test
废轮胎橡胶沥青具有良好的耐温变、抗疲劳和胶沥青6,脱硫胶粉在脱硫时,常常会断裂部分交
抗滑性能,能够降低路面噪音和筑路成本,还可废物联键,产生较多的橡胶短链和活性基,这有利于胶
循环利用,因此受到筑路界的高度关注.但是橡胶沥粉同沥青的化学结合,使胶粉在沥青中的分散性得
青的黏度高、高温储存稳定性差等特性仍然对施工到改善,从而改善橡胶沥青的一些性能
造成很大的限制,制约着橡胶沥青路用技术的发
但是,脱硫胶粉的使用也可能影响橡胶沥青一
展.为了解决以上难题,人们从改善沥青与橡胶些路用性能.在橡胶轮胎粉中,含有大量抗老化剂,
粉的相容性出发,尝试用脱硫胶粉来制备稳定型橡包括抗氧化剂、热稳定剂、变价金属抑制剂、紫外线
收稿日期:2011-10-12;修订日期:2012-01-18
基金项目:国家自然科学基金资助项目(51008075)
第一作者:何亮(1983-),男,重庆人,重庆交通大学讲师,博土.E- mail: lianghe@ caitu,edu,cn