青藏地区路用遮热涂层的制备及性能  

Preparation and Performance of Pavement Heat-shielding Coating for Qinghai-Tibet Area

作　　者：陈玉静 沙爱民[1,2] 胡魁[3] 刘状壮 曹世豪[3] 张华 CHEN Yujing;SHA Aimin;HU Kui;LIU Zhuangzhuang;CAO Shihao;ZHANG Hua(Key Laboratory for Special Area Highway Engineering of Ministry of Educaiton,Chang'an University,Xi'an 710064;School of Highway,Chang an University,Xi'an 710064;College of Civil Engineering and Architecture,Henan University of Technology,Zhengzhou 450001)

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]长安大学公路学院,西安710064 [3]河南工业大学土木建筑学院,郑州450001

出　　处：《材料导报》2019年第14期2319-2325,共7页Materials Reports

基　　金：“十二五”国家科技支撑计划项目(2014BAG05B04);交通运输部建设科技项目(2014318223010);国家自然科学基金(51608045);河南工业大学博士基金项目(2017BS035)~~

摘　　要：为了缓解青藏地区下伏冻土由沥青路面引起的热稳定性破坏,首次提出了适用于青藏地区沥青路面的遮热涂层,通过自主设计的涂层降温性能测试装置优选了涂层的结构形式并确定了功能型材料的最佳掺量,并进一步研究了涂层的降温性能随深度的变化规律,通过摆式摩擦仪以及加速加载设备MMLS3评价了涂层的路用性能。结果表明:新型遮热涂层的优选结构形式是上层反射与下层隔热相结合的复合式遮热涂层(CHSC),降温效果能够达到12.75℃;CHSC涂层中反射功能型材料的最佳掺量为15%(体积浓度),隔热功能型材料的最佳掺量为10%(体积浓度);CHSC涂层可以使道路内部深度5cm处降温9.6℃,使内部深度10cm处降温6.7℃;当陶瓷颗粒撒布量为0.8kg/m^2时,所得涂层的抗滑系数最佳且其耐磨性能同时满足《沥青路面设计规范》的要求。因此,该研究为缓解我国青藏地区下伏冻土融化问题提供了参考。I n order to reduce the stability damage of the underlying permafrost caused by asphalt pavement in Qinghai-Tibet area,an original creation of heat-shielding coating(HSC)was put forward in this work.By a self-developed cooling effect testing device,the optimal coating structure was selected and the optimum adding amount of the functional materials was determined.We also investigated the depth dependence of cooling effect,and by employing pendulum type frictiograph test and MMLS3 load-accelerating equipment,evaluated the anti-skid performance and wear resistance of the coating.The results show that the optimal coating structure is CHSC with a combination of an upper reflective layer and a lower insulative layer,which can reduce the surface temperature by 12.75℃.Moreover,the upper layer of CHSC mixed with 15%(PVC)reflective functional materials and the lower layer of CHSC mixed with 10%(PVC)insulative functional materials are recommended.CHSC can reduce the temperature by 9.6℃at the depth of 5 cm and by 6.7℃at the depth of 10 cm.The ceramic particles spread in the coating act as an anti-skid material,and the amount of 0.8 kg/m^2 can make CHSC achieve satisfactory anti-skid performance and wear resistance which are adequate for the requirement of pertinent standards.Our work can provides reference for the solution to the underlying permafrost problem in Qinghai-Tibet Area.

关 键 词：青藏地区 沥青路面 复合式遮热涂层(CHSC) 中空玻璃微珠 耐磨性能 

分 类 号：U419.92[交通运输工程—道路与铁道工程]