CAJ | 학술논문

在不同老化温度和老化时间下，对温拌沥青、基质沥青进行了老化试验，测试了老化前后沥青中正戊烷沥青质含量，建立了以正戊烷沥青质含量为参数的老化动力学模型，计算了老化反应速率常数和老化反应活化能等参数，据此对比研究了温拌沥青与基质沥青的老化动力特性。研究结果表明：沥青老化遵循一级反应动力学方程，老化过程中正戊烷沥青质含量均随时间的延长和温度的升高而增大，而温拌沥青具有较低的反应速率常数和较高的反应活化能，因此抗老化性能更好。以正戊烷沥青质含量为参数的老化动力学方程，能够较好地区分温拌沥青与基质沥青老化过程的差异。
재불동노화온도화노화시간하，대온반력청、기질력청진행료노화시험，측시료노화전후력청중정무완력청질함량，건립료이정무완력청질함량위삼수적노화동역학모형，계산료노화반응속솔상수화노화반응활화능등삼수，거차대비연구료온반력청여기질력청적노화동력특성。연구결과표명：력청노화준순일급반응동역학방정，노화과정중정무완력청질함량균수시간적연장화온도적승고이증대，이온반력청구유교저적반응속솔상수화교고적반응활화능，인차항노화성능경호。이정무완력청질함량위삼수적노화동역학방정，능구교호지구분온반력청여기질력청노화과정적차이。
The aging tests of warm mix asphalt and matrix asphalt were conducted at different aging temperatures and time,and the contents of n-pentane asphaltene in asphalt were measured before and after aging.By taking the content of n-pentane asphaltene as the parameter,the aging kinetics mod-els were established,and the reaction constants and reaction activation energies were calculated to contrastively analyze the aging kinetics characteristics of warm mix asphalt and matrix asphalt.Re-sults indicate that the aging process of the two asphalts follows the first-order kinetics reaction equa-tion,and the content of n-pentane asphaltene increases with the aging temperature and the aging time.The reaction constant of warm mix asphalt is lower than that of matrix asphalt,but the reaction activation energy of warm mix asphalt is bigger than that of matrix asphalt,so the anti-aging proper-ty of warm mix asphalt is better.The aging kinetics models based on the content of n-pentane as-phaltene can be used to well distinguish the difference of aging processes between warm mix asphalt and matrix asphalt.