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Numerical study of monitoring of early-age concrete strength development using PZT induced stress wave

Abstract The purpose of this paper is to verify the validity of concrete strength monitoring method based on piezoelectric wave dynamic technology by the numerical simulation ways. Since the elastic modulus of concrete increases linearly with its strength, the elastic modulus of concrete at different ages is set to simulate its strength growth. The stress wave is transmitted and received by the piezoelectric sensor embedded in concrete, and the stress wave energy value is taken as the strength identification parameter, and its variation trend with the strength is analyzed. The results show that with the increase of concrete strength, the energy value of monitoring signal has a monotonically decreasing trend. In the early stage of concrete, the monitoring signal energy decreases at a large rate and then tends to be flat. In the early stage, the strength growth rate of concrete is faster, and tends to be flat in the later stage. Furthermore, the curve of capability ratio and strength ratio was established, and the two presented good linear lines. The results of this paper show that the concrete strength monitoring method based on pressure wave dynamic technology can be used to monitor the concrete strength.


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