国产高温固化环氧沥青混合料生产施工关键技术研究

Key Technology of Production and Construction of Domestic High-Temperature Cured Epoxy Asphalt Mixture

针对环氧沥青材料的性能特点,研究了国产高温固化环氧沥青混合料在不同温度下的施工可操作时间;考察了拌和工艺和生产施工温度对混合料马歇尔指标的影响;并研究了养护条件对混合料强度形成的影响规律。试验结果表明:在160~180℃范围内,国产高温固化环氧沥青混合料具有较长的施工可操作时间(3~4 h),能满足工程应用需要;拌和工艺对混合料性能影响较小,通常工艺为主剂和固化剂先混合均匀,再与基质沥青及石料拌和;生产施工温度对混合料的性能有显著影响,其中拌和温度宜为160~180℃,碾压温度不宜低于130℃,施工环境温度不宜低于10℃;混合料强度的发展主要取决于养护时间和养护温度;准确把握高温固化环氧沥青混合料在生产施工过程中的关键节点,可有效地保证工程顺利实施。

According to the performance characteristics of epoxy asphalt material,the construction operation time of domestic high-temperature cured epoxy asphalt mixture at different temperatures was studied.The influence of mixing process and production construction temperature on mixture Marshall indicator was investigated,and the influence rule of curing conditions on the formation of mixture strength was studied.The test results show that the domestic high-temperature cured epoxy asphalt mixture has a longer construction operation time(3~4h)in the range of 160~180℃,which can meet the needs of engineering application.Mixing process has little effect on mixture performance,in which the main agent and curing agent are usually mixed evenly,and then mixed with the base asphalt and stone materials.The production construction temperature has a significant impact on mixture performance.The mixing temperature should be between 160~180℃,the rolling temperature should not be lower than 130℃,and the construction environment temperature should not be lower than 10℃.The development of mixture strength mainly depends on curing time and curing temperature.Accurately grasping the key nodes of hightemperature cured epoxy asphalt mixture in production and construction process could effectively ensure the smooth implementation of project.