Mechanoelectric transformation phenomenon usage for the concrete defectness state monitoring under the influence of freezing-thawing cycles

It is shown that the increasing defectness (cracking) of concrete under the influence of multiplyrepeated freezing-thawing cycles leads to a definite transformation of the spectral characteristics of the electric signal generated in the material in response to mechanical impact pulses. It is suggested that the maximum coefficient of mutual correlation between the spectrum of the electric response signal of a defect material and that of an intact sample can be used as a criterion for evaluating the extent of cracking (total crack length) in concrete and monitoring its variation.