复合式磁感应加热沥青路面融冰性能研究  

Study on ice melting performance of asphalt pavement under composite magnetic induction heating

作　　者：周宏云 张德润 曾伟 刘郑 ZHOU Hongyun;ZHANG Derun;ZENG Wei;LIU Zheng(Hubei Communications Investment Construction Group CO.,LTD.,Wuhan 430070,China;Hubei Chang Jiang Road&Bridge CO.,LTD.,Wuhan 430077,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]湖北交投建设集团有限公司,湖北武汉430070 [2]湖北长江路桥有限公司,湖北武汉430077 [3]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《长沙理工大学学报（自然科学版）》2024年第5期42-52,共11页Journal of Changsha University of Science & Technology:Natural Science

基　　金：湖北省交通运输厅科技项目(2023-121-1-28)。

摘　　要：【目的】解决传统单层导电沥青混凝土在磁感应加热融冰时出现的加热不集中、能量利用率低的问题。【方法】在沥青玛蹄脂碎石混合料(stone mastic asphalt,SMA)中掺入铁屑与钢砂两种材料制备马歇尔试件,并将其切片后组合为双层位复合式试件。通过磁感应加热效果试验和融冰效果试验,采用正交分析法,确定磁感应加热效果与融冰效果的关系,分析导电材料的掺量和层位分配对磁感应加热效果的影响。【结果】磁感应加热效果与融冰效果成正相关,也与感应加热层铁屑掺量成正相关。当磁场反射层钢砂掺量大于4%时,磁感应加热效果与钢砂掺量成正相关;当磁场反射层钢砂掺量小于4%时,磁感应加热效果与钢砂掺量成负相关。当磁场反射层厚度大于2 cm时,磁感应加热效果与磁场反射层厚度成正相关;当磁场反射层厚度小于2 cm时,磁感应加热效果与磁场反射层厚度成负相关。三因素对磁感应加热效果的影响程度最大的是感应加热层铁屑掺量,其次是磁场反射层钢砂掺量和厚度分配,两者相等。推荐铁屑掺量为8%、厚度为1 cm的感应加热层和钢砂掺量为2%、厚度为3 cm的磁场反射层组合,其感应加热效果和融冰效果最好,平均每秒融化成的水可达0.250 g。【结论】复合式磁感应加热沥青混凝土在感应磁场下,具有良好的加热效果与融冰效果。本研究成果可为复合式磁感应加热沥青混凝土路面的融冰研究提供一定借鉴。[Purposes]This paper aims to address the issues of uneven heating and low energy utilization of traditional single-layer conductive asphalt concrete when employing magnetic induction for ice melting.[Methods]Marshall specimens were prepared by adding two materials,iron filings and steel grits,into stone mastic asphalt(SMA),and they were then sliced and combined into double-layer composite specimens.Through the magnetic induction heating effect test and ice melting effect test,combined with orthogonal analysis,the relationship between magnetic induction heating effect and ice melting effect was determined,and the influence of the content and layer distribution of conductive materials on magnetic induction heating effect was analyzed.[Findings]The results indicate a positive correlation between the magnetic induction heating effect and the ice melting effect.This positive correlation is also observed with the iron filing content in the induction heating layer.When the steel grit content in the magnetic reflector exceeds 4%,there is a positive correlation with the magnetic induction heating effect.However,when it is less than 4%,a negative correlation appears.When the thickness of the magnetic reflector is more than 2 cm,the magnetic induction heating effect is positively correlated with it,and when the thickness of the magnetic reflector is less than 2 cm,the magnetic induction heating effect is negatively correlated with it.The influence of the iron filing content in the induction heating layer on the magnetic induction heating effect is the strongest,followed by that of the steel grit content in the magnetic reflector and thickness distribution between the two layers to the same degree.The combination of the induction heating layer with iron filings of 8%and thickness of 1 cm and the magnetic reflector with steel grit content of 2%and thickness of 3 cm contributes to the best induction heating effect and ice melting effect,and the average ice melting per second can reach 0.250 g.[Conclusions]The composite magneti

关 键 词：导电沥青混凝土 双层位复合式 磁感应加热 铁屑 钢砂 融冰 

分 类 号：U414[交通运输工程—道路与铁道工程]