摘要
Abstract
To improve the mechanical properties and road performance of emulsified asphalt cold recycled mixtures,granulated ground blast furnace slag powder(GGBFSP)was incorporated into the mixtures at different mass fractions(1%-5%).Mechanical tests,road performance evaluations,and nuclear magnetic resonance(NMR)experiments were conducted to analyze the enhancement effects of GGBFSP on mechanical and road performance,as well as its influence on micro-and meso-scale pore structures.The results show that:adding GGBFSP effectively enhances the mechanical strength of the mixture.With increasing GGBFSP content,the splitting strength,unconfined compressive strength,and indentation shear strength all first increase and then decrease,with the optimal GGBFSP addition being 3%by mass.After incorporating 3%GGBFSP,the dynamic stability of the conventional emulsified asphalt cold recycled mixture increases to 7 949 cycles/mm,the rut depth decreases from 2.468 mm to 1.936 mm,and the durability under freeze-thaw cycles is significantly improved.关键词
高速公路/冷再生混合料/掺量/方案比选/孔隙结构/路用性能/稳定性/耐久性Key words
highway/cold recycled mixture/dosage/scheme comparison/pore structure/road performance/stability/durability分类
交通工程
