Research on measurement technology of cement bend resistant and compressive machine

Author:

lei Chen,lu Peng,bing Zhang,lu Liu

Abstract

Abstract To study the influence of nano material microscopic structure on the macro-mechanical properties of concrete, using AE test and numerical simulation methods, the AE characteristic of Nano-concrete under cyclic loading was investigated. The results show that the Nano-concrete has Kaiser effect, however, it occurs in a certain stress level range. Compared with ordinary concrete, the Nano-concrete has higher AE energy, larger AE amplitude and stronger AE activity during the first 3 loading processes due to the micro influence of Nano-SiO2. Nevertheless, in the 4th loading, the AE energy cumulative curve of Nano-concrete is relatively flat because of the improvement of the bearing capacity of Nano-concrete. The numerical simulation results of RFPA and experimental results are consistent. The stress diagram and AE figure are able to image the characteristics of the specimen crack propagation process and the rupture position, which helps an in-depth understanding on the AE characteristics of Nano-concrete during its damage process.

Publisher

IOP Publishing

Subject

General Engineering

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