Application of Electromagnetic Method in Thickness Test of Protective Layer of Reinforced Concrete With High Reinforcement Ratio
In order to improve the accuracy of electromagnetic induction method in measuring the thickness of the protective layer of steel bars,this paper compares the measured value of the protective layer of steel bars measured by electromagnetic method and the actual value,analyzes the measurement accuracy of electromagnetic induction method,and puts forward the correction formula of the protective layer of steel bars.The relationship between the measured value of the protective layer of steel bars and the actual value is two approximate linear function relation-ships.The fitting coefficient is more than 0.9,the fitting effect is good.Compared with the measured values of drill core sampling,the calcu-lated values of reinforcement protective layer and their deviations are both less than 3 mm,which meets the design requirements,that is,the established piecewise function has a good correction effect on the thickness of reinforcement protective layer obtained by electromagnetic induc-tion.
Reinforced concreteHigh reinforcement ratioElectromagnetic methodThickness of reinforcement protective layerRapid detec-tionPiecewise function
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