摘要
为解决环氧阻燃沥青混合料施工工艺要求苛刻、成本高昂、推广应用受限等难题,采取将环氧沥青A、B两组分分2次掺入拌和的后掺法工艺制备和施工环氧沥青混合料,通过系统的路用性能试验及耐久性评价,将3 cm后掺法环氧沥青混凝土应用于实际工程。结果表明:1)后掺法环氧沥青混合料浸水残留稳定度95.5%,冻融劈裂强度比90.6%,动稳定度31500次/mm,60℃浸水条件下作用30万次无脱粒,最大车辙深度为1.5 mm,具有卓越的路用性能,抗化学腐蚀且阻燃;2)后掺法工艺摊铺取料制备环氧沥青混合料马歇尔稳定度平均为75.6 k N,变异系数为9.1%,表明后掺法拌和基本均匀,后掺法工艺可行、有效;3)工程应用各项实体及性能检验指标合格,能有效解决环氧沥青混凝土施工要求苛刻、应用范围受限等问题。
In order to solve the difficult problems of the fire-retardantepoxy asphalt mixture such as rigorous construction technique,high cost,limited promotion and application,the epoxy asphalt mixture was produced by post-doped methods which the A/B two components are mixed into the mixing respectively by 2 steps,then the road performance were systematically studied,the long-term performance was simulated,and the 3 cm epoxy asphalt concrete produced by post-doping was applied to the actual project.The results show that:1)the residual stability of epoxy asphalt mixture is 95.5%,the freeze-thaw splitting strength ratio is 90.6%,the rutting dynamic stability is 31500 times/mm and the maximum rut depth is 1.5 mm after 300000 times simulate loading at 60℃water-immersioncondition,which shows excellent road performance of chemical resistance and fire retardant;2)the average Marshall stability of the epoxy asphalt mixture which prepared by the post-mixing process paving and reclaiming materials is 75.6 kN and the coefficient of variation is 9.1%.It is indicated thatthe post-mixing process is feasible and effective;3)the various entities and performance inspection indexes of the engineering application are qualified,which can effectively solve the problems of harsh epoxy asphalt concrete construction requirements and limited application scope.
作者
张林艳
柏耘
孙武云
周宇
封基良
ZHANG Linyan;BAI Yun;SUN Wuyun;ZHOU Yu;FENG Jiliang(School of Architecture and Urban Planning.Yunnan University,Kunming 650000;Quality and Safety Supervision Bureau of Zhaotong Transportation Construction Engineering,Zhaotong 657000;Yunnan Wuding-Tangxun-Xundian Expressway Construction Headquarters,Kunming 650000;Comprehensive Construction Office of Yunnan Provincial Department of Transportation,Kunming 650000;Yunnan Changtan Technology Co.,Ltd.,Kunming,650012)
出处
《公路交通技术》
2020年第5期44-51,共8页
Technology of Highway and Transport
基金
云南省交通科技项目(云交科技〔2017〕35号,云交科教便〔2017〕49号)
昭通市科技专项项目(2017 jtkj02)。
关键词
隧道路面
后掺法
环氧沥青
耐腐蚀
长期性能
动态模量
tunnel pavements
post-doing
epoxy asphalt
corrosion resistance
long-term performance
dynamic modulus
