摘要
采用修正的Flory-Huggins方程计算老化沥青和再生剂的混合自由能并探讨它们之间的相行为。3种老化沥青的溶解度参数值和芳碳率均比相应的原料沥青高。再生剂R1与加德士老化沥青在25℃时的混合自由能ΔGM>0,再生剂R1与加德士老化沥青的混合过程为非自发过程,因此它们之间不能形成均相体系。3种老化沥青与R2、R3和复合再生剂在25℃的混合自由能ΔGM<0,混合过程为自发过程,因此老化沥青与R2、R3和复合再生剂能形成均相体系。
The modified Flory-Huggins formula was adopted to calculate the free energy in mixing old asphalt with rejuvenator,and discussed their phase behavior.The solubility parameters and ratio of aromatic carbon of three aged asphalts are more than that of their materials.The mixing free energy of Caltex aged asphalt and rejuvenator R1 is above 0.0（ΔGM〉0） at 25 ℃,their process of mixing is not spontaneity,so their mixing can＇t form the homogeneous phase system.The mixing free energies of R2,R3,composite rejuvenator and aged asphalt are all below 0.0（ΔGM〈0） at 25 ℃,their processes of mixing are spontaneity,so their mixing can form the homogeneous phase system.
出处
《辽宁石油化工大学学报》
CAS
2009年第4期19-23,共5页
Journal of Liaoning Petrochemical University
关键词
溶解度参数
混合自由能
老化沥青
再生剂
Solubility parameter
Free energy of mixing
Aged asphalt
Rejuvenator
