Monitoring method for solidification process of concrete test blocks on basis of piezoelectric impedance method

Abstract

The invention relates to a monitoring method for the solidification process of concrete test blocks on the basis of a piezoelectric impedance method. The monitoring method comprises the step of extracting a resonance-frequency offset index and root-mean-square offset index in piezoelectric admittance signals of piezoelectric ceramic stuck on the concrete test blocks to monitor the change of the compressive strength and the elastic modulus of the concrete test blocks in the solidification process. The monitoring method provides a new path for monitoring the compressive strength and the elastic modulus of the concrete test blocks in the solidification process in real time. Compared with the prior art, the monitoring method has the advantages that fast monitoring can be realized, and the compressive strength and the elastic modulus of the concrete test blocks can be fast obtained under the condition without a pressure machine, so that the quality of the concrete in the casting process is accurately controlled.

Description

technical field [0001] The invention relates to a structure monitoring technology, in particular to a method for monitoring the solidification process of a concrete test block based on a piezoelectric impedance method. Background technique [0002] As an important basis for concrete structure design, compressive strength and elastic modulus are the main mechanical properties of concrete. According to the traditional method, usually after 28 days of standard curing, the concrete specimens can be obtained after passing the test. For construction sites, it is often the case that large quantities of concrete with a certain mix ratio have been poured before the compressive strength is known and it is not known whether it will meet the requirements. On the contrary, if the expected 28-day strength and elastic modulus can be obtained within a few hours after pouring the concrete, measures including adjusting the mix ratio can be taken to control the quality of the concrete. Cont...

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Problems solved by technology

[0003] The present invention aims at the importance of monitoring the concrete structure after pouring, and proposes a monitoring method for the solidification process of the concrete test block based on the piezoelectric impedance method. Monitor the changes in the compressive strength and elastic modulus of the concrete test block during the curing process in the signal

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