Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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THE TESTING METHOD DEVELOPMENT OF A REINFORCEMENT-CONCRETE CONTACT STRENGTH BY THE PARAMETERS OF AN ELECTRIC RESPONSE TO SHOCK EXCITATION

Fursa T.V. 1 Osipov K.Yu. 2 Mormoev A.E. 1
1 National Research Tomsk Polytechnic University
2 V.E. Zuev Institute of atmospheric optics SB RAS
It is showed the results of reinforcement-concrete contact quality influence on the parametres of an electric response at elastic shock excitation. The researches carried out on a reinforced concrete laboratory models. Models represented as a samples of heavy concrete at a size of 100х100х100 mm with a metal stick inside in the center with a diameter of 10 mm and length of 120 mm. Artificial degradation of contact quality was reached by greasing a reinforcing stick with an oil. The methodics of reinforcement-concrete contact adhesive strength determination in the studied models reinforced concrete models is offered. It is showed that average adhesion strength of usual contact is about 5.7 MPa, while the strength of a contact through the oil is about 3.8 MPa. It is established that contact strength changing does not lead to significant change of signal amplitude, but conducts to appreciable change spectral peaks ratio of electric responses. The maximum correlation coefficient of spectra measured from comparing models amounts about 0.6-0.65.