摘要
通过对70#道路石油沥青在蒸馏水、酸、碱和盐溶液中浸泡前后的红外光谱(FTIR)测试,分析了水溶液的pH值和盐浓度对沥青在水溶液侵蚀过程中特征官能团的影响规律.结果表明,随着水溶液浸泡时间的延长,70#道路石油沥青的羰基指数和亚枫基指数逐渐增大,沥青在水溶液浸泡下发生了氧化;与蒸馏水相比,酸、碱和盐溶液使沥青羰基和亚枫基含量的增加更明显;酸碱性溶液中的酸碱性越大,沥青氧化越严重,其中,pH11碱溶液的氧化作用大于pH3的酸溶液;盐溶液中盐的质量分数越大,沥青的氧化程度越严重,质量分数为30%的Na_2SO_4溶液对沥青的氧化作用最大.
Infrared spectrum（FTIR）tests on 70# asphalt under distilled water,acidic water,alkaline water and neutral salt solution were carried out to analyze the the influence law of aqueous solution pH and salt concentration on asphalt characteristic functional groups in the process of erosion.The results indicate that the carbonyl and sulfoxide indices of 70# asphalt increase after moisture aging as the extension of aqueous solution immersion time,due to the asphalt oxidation in aqueous solution.Compared with the distilled water,acid,alkaline and salted solutions show more destructive,and the greater the concentration of the solution,the more serious the oxidation of asphalt.The oxidation effect of pH11 alkali solution is greater than that of pH3 acid solution.Besides,the greater the concentration of salt in the salt solution,the more serious the oxidation degree of asphalt,and the solution with 30% Na_2SO_4 presents the most serious destructiveness.
出处
《武汉理工大学学报（交通科学与工程版）》
2018年第1期31-34,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家重大科学仪器设备开发专项项目资助(2013YQ160501)
关键词
沥青
氧化
不同介质水溶液
羰基
亚枫基
asphalt
oxidation
different medium aqueous medium
carbonyl indices
sulfoxide index
