Research on Development and Performance of Environment Friendly Rubber-plastic Asphalt Ultra-thin Wearing Course
Epoxy soybean oil is added to crumb rubber-plastic modified asphalt to improve the compatibility and service performance of rubber-plastic asphalt,which can at the same time solve the pollution problem caused by crumb rubber and traditional compatibilizer aromatic oil.It is applied to ultra-thin wearing layers which fills the gap in the application field of this type of asphalt in ultra-thin wearing layers.Three grading types,SMA,OGFC,and Nova Chip,are selected for mix design.The road performance and slip resistance of the three types are compared and analyzed by means of rutting tests,trabecular bending tests and immersion Marshall tests.The results show that the grading type has a significant impact on the optimal asphalt content of the mixture,with the optimal asphalt to aggregate ratio of intermittent graded SMA reaching a maximum of 7.1％.Compared with the traditional rubber and plastic asphalt ultra-thin wearing course,the environment-friendly rubber and plastic asphalt ultra-thin wearing course has different degrees of improvement in road performance and skid resistance,indicating that the addition of epoxy soybean oil has effectively improved the performance of the mixture.Among the three types of environment friendly rubber plastic ultra-thin wearing layers,the performance of SMA with discontinuous grading is the best,indicating that environment friendly rubber plastic modified asphalt is more suitable for SMA with discontinuous grading.
NETL
NSTL
万方数据
