ИСТИНА

Chemical corrosion of concrete for decades remains one of the main problems of theconstruction industry and transport infrastructure. The corrosion should be controlled bythe periodical diagnostics and determination of the type of chemical corrosion. In recent years, laser-induced breakdown spectroscopy (LIBS) is considered for in-situ elementalanalysis of concrete. However, the particular content of corrosion-active componentsresponsible for the degradation of concrete (chlorine, sulfur and carbon) can be insufficientto characterize the degree of corrosion of concrete. Thus, the revealing the additional signaland parameters characterizing the material changes due to corrosion would be beneficialfor concrete structures diagnostics. It was proposed to use the signal of the iron oxideoriginated from rebar and optoacoustic response during laser ablation to enhancediagnostics. We have considered 6 samples, which imitate different degree of degradation.