摘要
为了降低沥青混凝土的冰雪覆盖,提高行车安全,利用碳纤维复配沥青制备出一种高效导电沥青胶浆并对其性能进行研究。研究结果表明,碳纤维∶分散剂∶交联剂配比为100∶1∶6,沥青用量为1000g时制备出的导电沥青胶浆(EC-AM)具有较好的电导率;经过DSR试验和DSC试验发现其具有较好的高温性能和低温性能,基本可达PG-64-14;在SEM试验中可以看到交联剂将分散的碳纤维连接,交联碳纤维较为均匀地分散在沥青中;通过导电性能研究发现,任意EC-AM试样两对边接通通电方式对融冰率近似相等,说明碳纤维在沥青中分散较为均匀,且当通电时间达到30min时,两对边均通电时融冰率可达到约90%;研究发现碳纤维可以均匀分散在沥青中,且一定配比的EC-AM具有较好的融冰性能。
In order to reduce ice and snow cover of asphalt pavement and improve driving safety,a kind of high efficiency conductive asphalt mortar is prepared by using carbon fiber composite asphalt and its properties are tested in this paper.The results show that the conductive asphalt mortar(EC-AM)prepared by carbon fiber:dispersing agent:cross-linker is 100∶1∶6 and asphalt content is 1000 g has good conductivity.At the same time,through DSR test and DSC test,it is found that it has good high temperature performance and low temperature performance,and can basically reach PG-64-14.In SEM test,it can be seen that the cross-linker connects the dispersed carbon fiber,and the cross-linked carbon fiber is more uniform.In the dispersed asphalt,through the study of electrical conductivity,the melting ice rate of any EC-AM sample is approximately equal to that of the two opposite sides,which indicates that the carbon fiber is dispersed uniformly in the asphalt,and when the power-on time reaches 30 min and when the two sides are electrified,the melting ice rate can reach about 90%.It can be found that the carbon fiber can be uniformly dispersed in asphalt,and a certain proportion of EC-AM has better ice melting performance.
作者
张向科
贾晓东
ZHANG Xiang-ke;JIA Xiao-dong(School of Urban Construction Engineering,Chongqing Technology and Business Institute,Chongqing 400052,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;National Joint Engineering Laboratory of Traffic and Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《公路》
北大核心
2020年第4期289-294,共6页
Highway
基金
重庆市教委科学研究项目,项目编号GZTG201615。
关键词
导电沥青胶浆
交联剂
复合改性
炭纤维
conductive asphalt mortar
cross-linking agent
composite modification
carbon fiber
