基于正交设计的废食用油组分基沥青再生剂性能  

Performance of waste cooking oil-based asphalt rejuvenators based on orthogonal design

作　　者：万贵稳 潘军凯 陈美祝[3] 王雪霞 张吉哲 苏衍岭 WAN Guiwen;PAN Junkai;CHEN Meizhu;WANG Xuexia;ZHANG Jizhe;SU Yanling(School of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250101,Shandong,China;Shandong Dongqing Highway Co.,Ltd.,Dongying 257092,Shandong,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,Hubei,China;School of Qilu Transportation,Shandong University,Jinan 250002,Shandong,China;Heze Highway Development Center,Heze 274000,Shandong,China)

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101 [2]山东东青公路有限公司,山东东营257092 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [4]山东大学齐鲁交通学院,山东济南250002 [5]菏泽市公路事业发展中心,山东菏泽274000

出　　处：《山东大学学报(工学版)》2024年第6期111-120,129,共11页Journal of Shandong University(Engineering Science)

基　　金：国家重点研发计划资助项目(2022YFB2603300,2022YFB2603303)。

摘　　要：针对废食用油来源和质量不稳定等问题,进行基于废食用油组分分离、多组分复合改性沥青再生剂设计与性能调控。采用相对分子量分级技术将废食用油过滤、精馏,获取不同相对分子量的3种组分,并添加增塑剂、增黏树脂、抗老化剂制备废食用油组分基沥青再生剂,通过正交试验确定不同黏度水平再生剂的最优材料配比。对再生剂热稳定性和微观性能及再生沥青的流变性能进行综合分析,结果表明:相对分子量等级是影响再生剂活化能的主要因素,随着相对分子量增大,再生剂热稳定性增强;再生剂的红外特征峰位置一致,峰强度存在一定差异,轻质组分和中质组分再生剂的芳香分特征峰面积是重质组分再生剂的2倍;最佳质量分数下再生沥青的复数模量大于基质沥青,相位角小于基质沥青,再生沥青的流变性能优于基质沥青;再生沥青的低温连续分级温度低于基质沥青,低温连续分级温度随废食用油组分相对分子量的增大而升高。This study focused on designing and regulating the properties of asphalt rejuvenators by separating components and performing multi-component composite modification of waste cooking oil,aiming to address challenges such as the instability of waste cooking oil sources and quality.The waste cooking oil was first filtered and distilled using equivalent molecular weight classification technology to obtain three different components with different equivalent molecular weights.Plasticizers,viscosity-increasing resins,and anti-aging agents were then added to prepare a waste cooking oil component-based asphalt regeneration agent.An orthogonal experiment was used to determine the optimal material ratio for the regeneration agent at different viscosity levels.A comprehensive analysis of the thermal stability and microstructural performance of the rejuvenator,as well as the rheological properties of the rejuvenated asphalt,reveals that the equivalent molecular weight grade was the primary factor influencing the activation energy of the rejuvenator.The thermal stability of the rejuvenator increased with the increase in equivalent molecular weight.The infrared characteristic peak positions of the rejuvenators were consistent,there were differences in peak intensities.The aromatic fraction characteristic peak areas of the light and medium fraction rejuvenators were twice as large as those of the heavy fraction rejuvenators.Under the optimal mass fraction,the complex modulus of reclaimed asphalt was greater than that of base asphalt,while the phase angle was smaller than that of base asphalt,which indicated that the rheological properties of reclaimed asphalt were superior to those of base asphalt.The low-temperature continuous grading temperature of the rejuvenated asphalt was lower than that of the base asphalt,and the low-temperature fractionation temperature increased with the equivalent molecular weight of the components of waste cooking oil.

关 键 词：沥青 废食用油 再生剂 热稳定性 流变性 

分 类 号：U414[交通运输工程—道路与铁道工程]