胜利100B和韩国70道路沥青的热老化过程  

HEAT AGEING OF PAVEMENT ASPHALT GRADES SHENGLI 100B AND SOUTH KOREA 70

作　　者：金鸣林[1] 史美仁[2] 冯安祖[3] 钱湛芬[3] 

机构地区：[1]上海应用技术学院,上海200233 [2]南京化工大学化工学院,南京210009 [3]华东冶金学院,马鞍山243000

出　　处：《南京化工大学学报》2001年第1期35-39,共5页Journal of Nanjing University of Chemical Technology(Natural Science Edition)

摘　　要：利用红外光谱和凝胶色谱等技术考察了胜利 10 0B和韩国 70两种道路沥青热老化后族组成、羰基与亚砜官能团以及相对分子质量分布的变化。结果表明 :虽然韩国 70沥青的延展性好于胜利沥青 ,但其耐老化性并不好。依据试验数据认为道路沥青的老化是沥青本身缓慢的自氧化过程。氧化生成氢过氧化物 ,最终转化成含羰基与亚砜官能团的组分 ,氧化反应符合游离基链反应历程。氧化促使沥青中含极性官能团组分之间的缔合与缩合 ,形成新的沥青质组分 ,使沥青平均相对分子质量增加 ,性能变差。Changes of group-component, functional groups of carbonyl and sulfoxide and molecular weight distribution of Shengli 100B and South Korea 70 asphalts after ageing were investigated by IR spectra and gel permeation chromatograph. The result indicated that the anti-ageing ability of the South Korea70 was not good though its ductility was better than that of Shengli 100B. In addition, the aged mechanism was considered as follows: the oxidation of asphalt with air was a slow auto-oxidation reaction, hydroperoxide intermediate was formed during ageing ,and then it was turned into the components containing carbonyl and sulfoxide group. The ageing mechanism meets the free radical chain-reaction. The content of asphaltine increased during ageing because of the association and condensation among molecular agglomerates.

关 键 词：沥青 氧化 热老化 老化机理 

分 类 号：TE626.86[石油与天然气工程—油气加工工程]