The resistivity of cement specimens mixed with carbon fibres under different pressures is studied. The results reveal that when pressure becomes larger and larger, the resistivity of speciments changes. The process ca...The resistivity of cement specimens mixed with carbon fibres under different pressures is studied. The results reveal that when pressure becomes larger and larger, the resistivity of speciments changes. The process can be di-vided into three stages; reversible sensing period, balance pe-riod, and sharp increasing period. These three periods re-spectively show the closure and opening of raw flaw in speci-mens , germination of fresh cracks and cracks extending to failure. The conducting mechanism is also analyzed. Ac-cording to the above characteristic of carbon fibre-cement specimen, it can be used as an intrinsic smart material to be ap-plied in the non-destructive detection of concrete dams,ect.展开更多
基金Funded by National Natural Science Fundation of China key project No 59432061
文摘The resistivity of cement specimens mixed with carbon fibres under different pressures is studied. The results reveal that when pressure becomes larger and larger, the resistivity of speciments changes. The process can be di-vided into three stages; reversible sensing period, balance pe-riod, and sharp increasing period. These three periods re-spectively show the closure and opening of raw flaw in speci-mens , germination of fresh cracks and cracks extending to failure. The conducting mechanism is also analyzed. Ac-cording to the above characteristic of carbon fibre-cement specimen, it can be used as an intrinsic smart material to be ap-plied in the non-destructive detection of concrete dams,ect.
