石蜡微胶囊调温沥青及混合料性能  

Performance of paraffin microcapsule temperature control asphalt and mixtures

作　　者：傅珍[1] 王化云 侯英杰 马峰[2] 袁康博 FU Zhen;WANG Hua-yun;HOU Ying-jie;MA Feng;YUAN Kang-bo(School of Materials Science and Engineering,Chang'an University,Xi'an 710064,Shaanxi,China;School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064 [2]长安大学公路学院,陕西西安710064

出　　处：《长安大学学报(自然科学版)》2025年第1期1-12,共12页Journal of Chang’an University(Natural Science Edition)

基　　金：国家重点研发计划项目(2023YFB0604600);重点科研平台水平提升项目(300102213501)。

摘　　要：为减轻高温对沥青路面造成的破坏,并延长道路使用寿命,将微胶囊相变材料掺入沥青结合料和沥青混合料来调节温度。采用原位聚合法,以石蜡为核心材料、三聚氰胺-脲素-甲醛(MUF)为壁材制备石蜡@三聚氰胺-脲素-甲醛(SL@MUF)微胶囊。将微胶囊(掺量分别为3%、6%、9%、12%)掺入70#沥青和SBS改性沥青中,对相变调温沥青的针入度、软化点、黏度和调温能力进行评估。选择掺量为6%和9%的SBS调温沥青制备相变调温沥青混合料,并对其高温、低温、水稳定和调温性能进行研究。研究结果表明:添加SL@MUF微胶囊后,2种相变调温沥青的软化点和黏度均有所提高,而针入度降低;相比70#沥青,SBS改性沥青受SL@MUF微胶囊的影响较小;SL@MUF微胶囊赋予沥青一定的潜热,使其具备储热能力;掺量为12%的SL@MUF微胶囊分别使70-12调温沥青与SBS-12调温沥青获得9.402、11.308 J/g的相变焓;随着SL@MUF微胶囊掺量的增加,相变调温沥青混合料的动态模量提高,弯曲劲度模量和最大弯拉应变降低;SL@MUF微胶囊会导致沥青混合料的冻融劈裂强度比和浸水残留稳定度略微降低;调温试验证明,掺量为12%的SL@MUF微胶囊可以使70-12调温沥青与SBS-12调温沥青的温度分别降低2.0℃和1.9℃,与未掺加微胶囊的SBS改性沥青及其混合料相比,可延迟峰值到达时间分别为10、4 min,可在一定程度上达到调节路面温度的效果。To mitigate the damage caused by high temperatures on asphalt pavements and extend the service life of roads,microcapsule phase change materials were added to asphalt binders and asphalt mixtures to regulate temperature.The paraffin@melamine-urea-formaldehyde(SL@MUF)microcapsules were prepared by in-situ polymerization,with paraffin as the core material and melamine-urea-formaldehyde(MUF)as the shell material.Microcapsules with different dosages(3%,6%,9%,and 12%)were added to 70#asphalt and SBS modified asphalt,and the penetration,softening point,viscosity,and temperature regulation capacity of the phase change temperature regulation asphalt were evaluated.SBS temperature regulation asphalt with 6%and 9%dosages were selected to prepare phase change temperature regulation asphalt mixtures,and their high-temperature,low-temperature,water stability,and temperature regulation properties were investigated.The research results indicate that the addition of SL@MUF microcapsules increase the softening point and viscosity of both types of phase change temperature regulation asphalt,while the penetration decreases.Compared with the 70#asphalt,SBS modified asphalt is less affected by SL@MUF microcapsules.SL@MUF microcapsules impart latent heat to the asphalt,giving it thermal storage capabilities.The microcapsules with the dosage of 12%result in phase change enthalpies of 9.402 J/g and 11.308 J/g for 70-12 temperature regulation asphalt and SBS-12 temperature regulation asphalt,respectively.As the SL@MUF microcapsules dosage increases,the dynamic modulus of the phase change temperature regulation asphalt mixtures increases,while the bending stiffness modulus and maximum bending strain decrease.SL@MUF microcapsules slightly reduce the freeze-thaw splitting tensile strength ratio and water immersion residual stability of the asphalt mixtures.Temperature regulation tests demonstrate that SL@MUF microcapsules with a dosage of 12%can lower the temperature of 70-12 temperature regulation asphalt and SBS-12 temperature regulation

关 键 词：道路工程 相变材料 试验研究 沥青及沥青混合料 路用性能 调温性能 

分 类 号：U414[交通运输工程—道路与铁道工程]