A study on research progress of strength characteristics and fracture failure mechanism of cold recycled asphalt emulsion mixture
In the context of"double carbon"targets,cold recycled asphalt emulsion mixture(CRAEM)as a cold mixed pavement material had gained widespread attention in road engineering.The research progress of the key technical problems in the design and application of CRAEM was reviewed,the research findings on construction control,strength development mechanism and damage behavior characteristics of CRAEM were systematically summarized.With regard to the preparation process of CRAEM,the relevant technologies at home and abroad were fully investigated,the effects of the material composition,mixing process,formation approaches and curing conditions on the construction workability were illustrated.As for the strength develop-ment mechanism of CRAEM,the microstructural characteristics under different influencing factors were expounded,the interface behavior during the strength formation process was refined.Moreover,the theoretical and experimental methods for investigating fracture behavior and fracture mechanism were included,the dam-age mechanism and fatigue characteristics of CRAEM were discussed also.It was suggested that forming a comprehensive cognitive system of material composition characteristics,revealing the strength formation mecha-nism of CRAEM from a multi-scale perspective,and characterizing the stage evolution of the fatigue damage process dynamically could improve the mechanical properties of CRAEM and prolong the service life of the cold reclaimed pavement.
NETL
NSTL
万方数据
