Preparation of waste oil/resin/dioctyl adipate composite regenerant and evaluation of protective effect of warm mixing agent on asphalt mixing aging
To verify the applicability of waste oil for the recovery of asphalt aging performance,a composite waste oil re-generation agent was prepared by means of a response surface method using waste oil,C9 petroleum resin,and dioctyl adipate as raw materials.To avoid the volatilization and aging of lightweight components during the mixing process of re-cycled asphalt,a warm mixing agent was introduced to reduce the mixing temperature and obtain performance protection of recycled asphalt.At the same time,the regeneration effect of the recycled agent on the aged asphalt and the protective effectiveness of the warm mixed agent were investigated.The results indicated that the defects of poor low-temperature ductility of aged asphalt were recovered.The recycled asphalt exhibited a better resistance to high-temperature deforma-tion than base asphalt.After warm mixing,there were more viscous components in the recycled asphalt.This resulted in superior low-temperature rheological performance.The regenerant supplemented the aromatic compounds of the aged as-phalt effectively.The small molecular oil substances in the warm mixed recycled asphalt were well protected,and the generation of large molecular matter groups during the secondary aging was controlled.
road engineeringrecycled asphaltwarm mixing agentsecondary agingperformance loss
国家科技期刊平台
NSTL
万方数据
维普
