二次就地热再生沥青路面性能及经济效益研究  

Study on the Performance and Economic Benefit of Asphalt Pavement in Secondary Hot In-place Recycling

作　　者：陈涛 洪盛祥 王鸿森 黄九达 张杨 CHEN Tao;HONG Shengxiang;WANG Hongsen;HUANG Jiuda;ZHANG Yang(JSTI Group Co.,Ltd.,Nanjing 210019,China;National Engineering Research Center of Advanced Road Materials,Nanjing 211112,China)

机构地区：[1]苏交科集团股份有限公司,南京210019 [2]新型道路材料国家工程研究中心,南京211112

出　　处：《现代交通技术》2022年第6期12-17,共6页Modern Transportation Technology

基　　金：江苏省科技创新支撑计划项目(BZ2022019);南京市科技计划项目(2021—12004)。

摘　　要：沥青路面就地热再生技术具有绿色、节能和环保的优点,符合国家“双碳”战略目标,被广泛应用于高速公路养护中。对二次就地热再生沥青路面的性能及经济效益进行研究,结果表明:掺入适当的集料、再生剂后,一次再生沥青混合料可恢复级配和性能;二次就地热再生通过预铣刨工艺提高新料掺量,其混合料的结构稳定性、水稳定性和高温稳定性均能达到一次再生后的性能水平。观测结果显示,二次就地热再生技术的工程应用效果良好,可延长4~5年路面使用年限,与铣刨重铺相比,全寿命周期内可减少14%的养护经费投入。With the advantages of green,energy saving and environmental protection,asphalt pavement hot-in-place recycling technology is in line with the national“double carbon”strategic goal and is widely used in highway maintenance.The results of the study on the performance and economic benefits of the secondary heat-in-place regeneration show that the gradation and asphalt properties can be restored by mixing the appropriate aggregates and regenerants in one-time recycled mixture.The secondary heat-in-place regeneration can increase the amount of new material through the pre-milling process.The structural stability,water stability and high temperature performance of the mixture can reach the level of primary regeneration performance.The application effect of the secondary heat-in-place regeneration project is good.According to the observation results,it can extend the service life of the pavement by 4 to 5 years.Compared with milling and resurfacing,it can reduce the maintenance cost by 14%in the whole life cycle.

关 键 词：道路工程 二次再生 材料性能 经济效益 

分 类 号：U416.217[交通运输工程—道路与铁道工程]