抽出油活化废胶粉改性沥青老化性能  

Aging performance of extracted oil activated waste rubber powder modified asphalt

作　　者：孔佩佩 符刘旭 徐刚[1] 陈先华[1] 张久洋 张超 KONG Pei-pei;FU Liu-xu;XU Gang;CHEN Xian-hua;ZHANG Jiu-yang;ZHANG Chao(School of Transportation,Southeast University,Nanjing 211189,Jiangsu,China;Sichuan Digital Transportation Technology Co.Ltd.,Chengdu 610095,Sichuan,China;School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,Jiangsu,China;Huzhou Huaxing Urban Construction Development Co.Ltd.,Huzhou 313000,Zhejiang,China)

机构地区：[1]东南大学交通学院,江苏南京211189 [2]四川数字交通科技股份有限公司,四川成都610095 [3]东南大学化学化工学院,江苏南京211189 [4]湖州市华兴城建发展有限公司,浙江湖州313000

出　　处：《长安大学学报（自然科学版）》2024年第2期22-33,共12页Journal of Chang’an University(Natural Science Edition)

基　　金：国家重点研发计划项目(2022YFB2602604)。

摘　　要：为探究抽出油活化废胶粉改性沥青(ARMA)的老化性能和老化机理,通过室内加速老化试验分别对ARMA的短期老化和长期老化进行模拟,并利用动态剪切流变仪、傅里叶红外光谱仪、四组分分析、元素分析以及扫描电子显微镜对不同老化条件下ARMA的老化性能和微观结构进行研究。研究结果表明:随着老化程度的加深,ARMA的复数剪切模量、车辙因子以及疲劳因子逐渐增大,相位角逐渐减小,且ARMA的复数剪切模量、相位角及其对应老化指数的变化量均小于废胶粉改性沥青(RMA)的相同指标变化量;ARMA中饱和分、芳香分以及胶质的含量随老化强度的增强而减少,沥青质含量却增加;ARMA中碳、氢元素含量随老化强度的增强而减少,但氧、硫元素含量及芳碳率、环结构缩合指数表现出与之相反的趋势;红外光谱上ARMA的羰基、亚砜基峰强度随老化程度的加深而增强,对应的羰基老化指数和亚砜基老化指数呈增大趋势;C=C峰强度却随之减小,对应的丁二烯老化指数也呈减小趋势;微观形貌图上ARMA中活化废胶粉与沥青间的界面结合能力随老化作用而逐渐减弱,活化废胶粉逐渐从沥青中突显出;抽出油活化废胶粉改性沥青的抗老化机理是活化作用增强了废胶粉的活性,使废胶粉与基质沥青形成稳定的胶体结构,从而阻碍了老化过程中氧气对胶体结构的侵蚀,实现了活化废胶粉改性沥青抗老化能力的提高。To investigate the aging performance and aging mechanism of the extracted oil activated waste rubber powder modified asphalt(ARMA),the indoor accelerated aging tests were conducted to simulate both short-term aging and long-term aging of ARMA.And the dynamic shear rheometer,Fourier infrared spectroscopy,four component analysis,elemental analysis,and scanning electron microscope were adopted to investigate the aging performance and microstructure of ARMA under different aging conditions.The results show that with the deepening of the aging degree,the complex shear modulus,rutting factors and fatigue factors of ARMA gradually increase,but the phase angle gradually decreases.The changes of the complex shear modulus,phase angle and the corresponding aging index of ARMA are smaller than those of the waste rubber powder modified asphalt(RMA).The content of saturated fraction,aromatic fraction and resin in ARMA decrease with the aging intensity,while the content of asphaltene increases.The content of carbon and hydrogen in ARMA decrease with the aging intensity,but the content of oxygen and sulfur,as well as the aromatic carbon ratio and the ring structure condensation index show the opposite trend.The intensity of the carbonyl and sulfoxide peaks in the infrared spectra of ARMA increase with the deepening of the aging degree,and the corresponding carbonyl and sulfoxide aging indices increase.The intensity of C=C peak in the infrared spectra of ARMA decrease with aging,and the corresponding butadiene aging index also decreases.The interfacial bonding ability between the activated waste rubber powder and base asphalt in ARMA on the microscopic morphology graph gradually weakens with aging,and the activated waste rubber powder gradually protrudes from base asphalt.The anti-aging mechanism of ARMA is that activation enhances the activity of waste rubber powder,which makes the waste rubber powder and the base asphalt form a stable colloidal structure,thus hindering the erosion of oxygen on the colloidal structure during the

关 键 词：道路工程 抽出油活化废胶粉改性沥青 试验研究 老化性能 

分 类 号：U414[交通运输工程—道路与铁道工程]