The Study On The Effect Of Melting Snow And Ice By Asphalt Concrete Pavement Filled With Phase-change Material And Carbon Fiber Material

The traditional methods of melting snow and ice on the pavement can only provide the manual afterwards treatment,which don't have the initiative and can not solve the"secondary freezing" problem.What's worse,some of them can do harm to the environment and the pavement structure,for example,the salt method.In order to provide more comprehensive and systematic treatment to the snow problem on pavement in the low temperature season,mixing carbon fiber conductive asphalt concrete with microcapsule phase change material to make it have electrical conductivity and phase change heat storage performance.In this way,pavement can not only inhibit itself of temperature reduction and "secondary freezing" with its phase change heat storage performance,but also solve serious snow cover problem of the pavement with its electrical conductivity.what's more,the whole process will do no harm to the environment and the pavement structure.This article's research is based on the pre-existing conductive concrete and phase-change concrete research results.At first,the species choices and nature of carbon fiber material and microcapsule phase change material are researched;then,on the basis of theoretical analysis,electrical conductivity and phase change heat storage performance of the test asphalt concrete are researched through cooling down test and the resistivity test under different dosage levels;then,through marshall test,the influence of mixing carbon fiber material and microcapsule phase change material with asphalt concrete on marshall test index and optimum proportion is researched,beyond that,the influence of mixing carbon fiber material and microcapsule phase change material with asphalt concrete on pavement performance is studied through immersing marshall test,freeze-thaw splitting test,high-temperature rutting test,low-temperature trabecular test;at last,synthesizes electrical conductivity,phase change heat storage performance and pavement performance,the best dosage level of carbon fiber material and microcapsule phase change material is identified as 0.1%and 0.3%.On basis of the previous section,through the finite element analysis software,analyze and simulate the test asphalt concrete's performance of melting snow and inhibition of "secondary freezing" under the actual environmental conditions.