CAJ | 학술논문

利用红外光谱和凝胶色谱等技术考察了胜利100B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。
이용홍외광보화응효색보등기술고찰료성리100B화한국70량충도로력청열노화후족조성、탄기여아풍관능단이급상대분자질량분포적변화。결과표명：수연한국70력청적연전성호우성리력청，단기내노화성병불호。의거시험수거인위도로력청적노화시력청본신완만적자양화과정。양화생성경과양화물，최종전화성함탄기여아풍관능단적조분，양화반응부합유리기련반응역정。양화촉사력청중함겁성관능단조분지간적체합여축합，형성신적력청질조분，사력청평균상대분자질량증가，성능변차。
Changes of group－component, functional groups of carbonyl and sulfoxide and molecular weight distribution of Shengli 100B and South Korea 70 asphalts af ter ageing were investigated by IR spectra and gel permeation chromatograph. Th e result indicated that the anti-ageing ability of the South Korea70 was not goo d though its ductility was better than that of Shengli 100B. In addition, the ag ed mechanism was considered as follows: the oxidation of asphalt with air was a slow auto-oxidation reaction, hydroperoxide intermediate was formed during agein g ,and then it was turned into the components containing carbonyl and sulfoxide group. The ageing mechanism meets the free radical chain-reaction. The content o f asphaltine increased during ageing because of the association and condensation among molecular agglomerates.