新型环氧树脂复合相变材料对沥青混合料调温性能影响  

Influence of epoxy resin composite phase change material on road and temperature regulation performance of asphalt mixture

作　　者：王小庆 司伟[1,2] 马骉 王薇[3] 于淼 WANG Xiao-qing;SI Wei;MA Biao;WANG Wei;YU Miao(School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;Postdoctoral Research Station,Xizang Tianlu Co.Ltd.,Lhasa 850000,Xizang,China;Sichuan Jiuma Expressway Co.Ltd.,Aba Xizang and Qiang Autonomous Prefecture 610000,Sichuan,China;Xi'an Highway Research Institution,Xi'an 710064,Shaanxi,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]西藏天路股份有限公司博士后科研工作站,西藏拉萨850000 [3]四川久马高速公路有限责任公司,四川阿坝藏族羌族自治州610000 [4]西安公路研究院有限公司,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2024年第2期34-45,共12页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(52278430);西藏自治区天路科研创新发展基金项目(XZ 2019 TL-G-04);中国博士后科学基金项目(2022MD713805)。

摘　　要：为解决相变材料用于沥青混合料热稳定性与力学性能不足的问题,采用环氧树脂与十五烷定形封装相变材料制备新型环氧树脂复合相变材料,并采用等体积替换法将其用于沥青混合料中。采用差示扫描量热仪(DSC)、热重分析仪(TG)与导热系数仪进行环氧树脂复合相变材料相变与热物特性测试分析;通过相变沥青混合料温度调控试验分析其调温性能与效果,并对相变沥青混合料路用性能进行验证。研究结果表明:环氧树脂复合相变材料相变焓值可达60 J/g以上,在180℃以内几乎不发生热损失,储热密度高、热稳定性良好;相变区间内表观比热容显著增大,升、降温过程中最大值分别为10.9和6.7 J/(g·℃);相变材料掺量(质量分数)越大温度调控效果越好;调温性能与混合料位置相关,相变沥青混合料最大调温温差和最大温度变化速率降低值随深度增大而增大;各掺量下相变沥青混合料均具有显著的调温效果,掺量小于4%时相变沥青混合料均可满足路用性能要求。To solve the problem of insufficient thermal stability and mechanical properties of phase change materials for asphalt mixture,a new type of epoxy resin composite phase change material was prepared by using epoxy resin composite and pentadecane shaped encapsulation phase change material,and equal volume substitution method was used in asphalt mixture.The phase change and thermal properties of epoxy resin composite phase change materials were tested and analyzed by differential scanning calorimetry(DSC),differential thermal(TG)analysis and thermal conductivity meter.The temperature regulation performance and effect of phase change asphalt mixture were analyzed by temperature regulation test,and the road performance of phase change asphalt mixture was verified.The results show that the phase change enthalpy of epoxy resin composite phase change material can reach more than 60 J/g,and there is almost no heat loss within 180℃,with high heat storage density and good thermal stability.The apparent specific heat capacity increases significantly in the phase change interval,and the maximum values are 10.9 and 6.7 J/(g·℃)during the heating and cooling process,respectively.The greater the content of phase change material,the better the temperature regulation effect,the temperature regulation performance is also related to the location of the mixture.The maximum temperature difference and the maximum temperature change rate of the phase change asphalt mixture increase with the increase of depth.The phase change asphalt mixture has significant temperature regulation effect under each content.When the content of epoxy resin composite phase change material is less than 4%,the phase change asphalt mixture can meet the road performance requirements.

关 键 词：道路工程 沥青混合料 试验研究 相变材料 路用性能 温度调控 

分 类 号：U416.2[交通运输工程—道路与铁道工程]