关键词: 再生混凝土;多重界面模型;显微硬度;界面过渡区

Abstract: Compared with ordinary concrete, recycled concrete has multiple weak interface structure, which is the main reason for the low performance of recycled concrete.On the basis multi interface model, test the Vicker hardness of the management three interface structure using Micro Vickers Hardness Tester to investigated the characterization of the microstructure of the interfacial transition zone of recycled concrete.Research results show that: The use of micro-hardness tester can accurately locate, analyze different microhardness ITZ and interfacial transition zone width, and can be seen microhardness tester provides a scientific and effective research for the study of recycled concrete interfacial transition zone means.

Key words: recycled concrete;multiple interface model;micro hardness;interfacial transition zone