摘要
采用浓度为10%的亚硫酸盐饱和溶液(质量比为1∶2的Na_2SO_4与NaCl)模拟本地盐渍环境,采用真空饱水法加速其劣化作用。首先通过马歇尔试验和车辙试验确定再生混合料中最佳玄武岩纤维的掺量及新沥青掺量;其次,通过浸水马歇尔试验和多次冻融循环劈裂试验研究其耐久性能。试验结果表明:经过短期浸泡后,处于高浓度盐腐蚀环境中的再生混合料的浸水残留稳定度略高于水环境的;随着冻融循环次数的增加,高浓度饱和盐腐蚀环境加速劣化混合料的性能,在经过7次冻融循环后,置于水环境中的混合料试件的TSR满足规范要求,而置于高浓度盐腐蚀环境中的混合料设计已不满足规范要求。
Local saline environment is simulated by concentration of 10%sulfite solution（a mass ratio of 1∶2between NaCl and Na2SO4）and using vacuum full water to accelerate the degradation effect.Firstly the best content of basalt fiber and new asphalt are determined by Marshall test and rutting test.Then the durability performance of the recycled mixture is studied by immersing Marshall test and repeated freeze-thaw cycle split test.Laboratory tests results show that：the residual stability in high concentration salt corrosive environment is higher than that of the water environment;with the increase of freeze-thaw cycles,the deterioration of durability is accelerated in high concentration saturated salt corrosion environment.After seven times of freeze-thaw cycles,TSRof recycled asphalt can meet the requirements of specification in the water environment,but TSRcannot meet in the corrosive environment.
出处
《公路》
北大核心
2016年第3期171-175,共5页
Highway
基金
国家自然科学基金项目
项目编号51168042
塔里木大学校长基金项目
项目编号TDZKSS201417
塔里木大学校长基金创新群体研究项目
项目编号ZDZKPY201401
关键词
再生玄武岩纤维沥青混合料
亚硫酸盐腐蚀
耐久性
recycled basalt fiber reinforced asphalt mixture
sulfite corrosion
durability
