废食用油预脱硫胶粉改性沥青流变特性研究  

Rheological Characteristics of Waste Cooking Oil Pre-desulfurized Crumb Rubber Modified Asphalt

作　　者：杨杰 赵梦珍 蔡燕霞 路凯冀 高颖[4] YANG Jie;ZHAO Meng-zhen;CAI Yan-xia;LU Kai-ji;GAO Ying(Zhong Lu Gao Ke(Beijing)Road Technology Co.,Ltd.,Beijing 100088,China;Research and Development Center of Transport Industry of New Materials,Technologies Application for Highway Construction and Maintenance,Beijing 100088,China;School of Hydraulic and Civil Engineering,Ludong University,Yantai,Shandong 264025,China;School of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China)

机构地区：[1]中路高科(北京)公路技术有限公司,北京100088 [2]公路建设与养护新材料技术应用交通运输行业研发中心,北京100088 [3]鲁东大学水利土木学院,山东烟台264025 [4]河北工程大学土木工程学院,河北邯郸056038

出　　处：《公路交通科技》2024年第11期33-40,198,共9页Journal of Highway and Transportation Research and Development

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX1269);重庆市博士“直通车”科研项目(2022BSXM-JCX0169)。

摘　　要：针对橡胶沥青黏度高、存储稳定性差、施工污染较大及废食用油循环利用程度低等问题,提出了废食用油预脱硫处理废轮胎胶粉技术,并将高温下制备的废食用油与胶粉混合物用于改性基质沥青。采用离析试验评价了废食用油预脱硫胶粉改性沥青的存储稳定性。通过Brookfield旋转黏度试验、动态剪切流变试验、弯曲梁流变试验,深入研究了废食用油预脱硫胶粉改性沥青的流变特性;分析了不同类型的废食用油与胶粉混合物对改性沥青胶结料黏度、失效温度、复数剪切模量、相位角、蠕变劲度、蠕变速率等流变学指标的影响。结果表明:废食用油预脱硫胶粉改性沥青的储存稳定性相比橡胶沥青大幅提升,改性沥青加工时间对离析指标影响较小;预脱硫胶粉改性沥青具有良好的加工流动性,黏度对温度的敏感性较低;加入废食用油与胶粉混合物后,沥青的失效温度和复数剪切模量均降低,高温抗车辙变形能力减弱;相位角减小,变形恢复能力得到提高;改性沥青失效温度与加工时间呈线性增长关系;随着废食用油与胶粉混合物零剪切黏度的增大,改性沥青高温性能显著改善;废食用油与胶粉混合物对增强沥青的低温抗裂性能有显著效果;通过延长制备时间,沥青的复数剪切模量增长,相位角减小,失效温度达75℃,优于基质沥青;―36℃下的蠕变劲度增大、蠕变速率降低,但与基质沥青相比仍拥有出色的低温抗裂性能。Aiming at the problems of rubber asphalt high viscosity,poor storage stability,high pollution in construction and the low recycling degree of waste cooking oil,the technology on crumb rubber pre-desulfurization with waste cooking oil was proposed.The mixture of waste cooking oil and crumb rubber prepared at high temperature was used to modify the matrix asphalt.The storage stability of waste cooking oil pre-desulfurized crumb rubber modified asphalt was evaluated by using the segregation experiment.Through the Brookfield rotational viscosity test,dynamic shear rheology test and bending beam rheological test,the rheological properties of waste cooking oil pre-desulfurized crumb rubber modified asphalt were studied in depth.The influences of different mixture types of waste cooking oil and crumb rubber on rheological properties were analyzed,e.g.,viscosity,failure temperature,complex modulus,phase angle,creep stiffness,and creep rate.The result indicates that compared with rubber asphalt,the storage stability of waste cooking oil pre-desulfurized rubber powder modified asphalt is greatly improved.The modified asphalt processing time has little effect on the segregation index.The modified asphalt with pre-desulfurized crumb rubber has good processing fluidity and low viscosity sensitivity to temperature.When the mixture of waste cooking oil and crumb rubber is added,the asphalt failure temperature and complex modulus are reduced;and the high temperature resistance to rutting deformation is weakened.With the phase angle decreases,the deformation recovery ability is improved.The failure temperature of modified asphalt has the linear increasing relation with the processing time.As the zero shear viscosity of mixture of waste cooking oil and crumb rubber increases,the high temperature performance of modified asphalt is significantly improved.The mixture of waste cooking oil and crumb rubber has the significant effect on improving the low temperature crack resistance of matrix asphalt.By extending the preparation time,th

关 键 词：道路工程 改性沥青 流变学 废食用油 胶粉 

分 类 号：U414[交通运输工程—道路与铁道工程]