CAJ | 학술논문

为了减少高温车辙病害的产生,提出采用"主动"降低沥青路面温度的方式以降低车辙病害产生的方式.研究分析了沥青混合料及其骨料的热物参数与沥青路面温度的关系.采用Williamson公式和热学导热系数推算公式计算分析骨料热物参数对沥青混合料热物参数的影响,在室内试验中用常功率平面热源法进行验证;应用传热学中一维导热方程和巴勃模型,研究了路面结构热力学材料参数对于沥青路面结构温度的影响.结果表明,在正常的高温条件下,导热系数较小的材料其路面结构内部的温度相对较低.在室外试验中,普通沥青混合料与采用导热系数较小的材料制备的沥青混合料的底层温度相差可达6℃.
위료감소고온차철병해적산생,제출채용"주동"강저력청로면온도적방식이강저차철병해산생적방식.연구분석료력청혼합료급기골료적열물삼수여력청로면온도적관계.채용Williamson공식화열학도열계수추산공식계산분석골료열물삼수대력청혼합료열물삼수적영향,재실내시험중용상공솔평면열원법진행험증;응용전열학중일유도열방정화파발모형,연구료로면결구열역학재료삼수대우력청로면결구온도적영향.결과표명,재정상적고온조건하,도열계수교소적재료기로면결구내부적온도상대교저.재실외시험중,보통력청혼합료여채용도열계수교소적재료제비적력청혼합료적저층온도상차가체6℃.
In order to reduce the rotting of asphalt mixture pavement,a new method of actively'reducing the temperature of asphalt pavement was presented.The relation of thermophysical parameters of asphalt mixture and its aggregate with the temperature of asphalt pavement was analyzed.The influence of thermophysical parameters of aggregate on thermophysical parameters of asphalt mixture was analysed by Williamson formula and formula of thermal conductivity coefficient in thermology,which was tested by indoor plane heat source method with constant heat rate.After that,the impact of thermodynamic parameters of pavement material on temperature of pavement structure was researched in terms of one-dimensional conduct equation and Barber model.The result shows that(1) the material with lower thermal conductivity coefficient is corresponding to lower pavement temperature at normal high temperature;(2)in contrast with traditional asphalt mixture,the bottom temperature of thermal resistance materials with lower thermal conductivity coefficient will be lower by 6℃ under outdoor natural conditions.