摘要
我国大部分地区尤其是西部地区日照时间长,太阳光谱中紫外线比例高,而紫外辐射同样也会导致沥青的老化。对传统基质沥青和SBS、消石灰、反应型三元共聚物(RET)及多聚磷酸(PPA)改性沥青的紫外老化特性进行了研究。试样的降解使用傅里叶变换红外光谱和热分析进行了分析,从红外光谱结果可以看出,当紫外老化200 h时,SBS、多聚磷酸(PPA)和消石灰改性沥青与传统基质沥青相比表现出更高的耐光降解能力。SBS改性沥青和消石灰改性沥青,老化后最大降解率的温度和降解终止温度增加。
Most parts of China, especially the western region has long hours of sunshine, high proportion of ultraviolet in solar spectrum, while the UV radiation also causes asphalt aging. The purpose of this paper is to study UV aging characteristics of the traditional asphalt and SBS, lime, reactive terpolymer （RET） and polyphosphoric acid （PPA） modified asphalt. Degradation of the sample using Fourier transform infrared spectroscopy and thermal analysis were analyzed. The results of IR spectroscopy showed that when the UV aging 20Oh, SBS, polyphosphoric acid （PPA） and slaked lime modified asphalt compared with conventional asphalt expressed a higher light degradation. Aging temperature of maximum degradation rate and degradation termination temperature of SBS modified bitumen and hydrated lime modified asphalt increased.
出处
《石油沥青》
2014年第4期16-20,共5页
Petroleum Asphalt
基金
重庆市科技攻关计划项目(项目编号:2013AC6203)
关键词
多聚磷酸(PPA)
光降解
紫外老化
改性沥青
polyphosphoric acid
light degradation
ultraviolet aging
modified asphalt
