ESTIMATING METHOD, ESTIMATING DEVICE, AND ESTIMATING PROGRAM FOR DIFFUSION COEFFICIENT OF TARGET ELEMENT OF CONCRETE

摘要

PROBLEM TO BE SOLVED: To allow for accurate determination of presence of occurrence of carbonation in a hardened concrete, quantitative and direct estimation of a progress situation of carbonation, and appropriate estimation of a diffusion coefficient concerning salt penetration.SOLUTION: An emission spectrum at a plurality of sample axial center direction positions of a concrete sample is measured (S1), an equation of regression line representing relationship between emission intensity of carbon specified on the basis of the emission spectrum and emission intensity of calcium is calculated (S2), a confidence band of the regression line is calculated (S3), carbonation is determined to occur at a measuring point at which the emission intensity of carbon is greater than the emission intensity of calcium and a combination of the emission intensity of carbon and the emission intensity of calcium is not within the confidence band of the regression line (S4), and a percentage of occurrence of carbonation for the sample axial center direction position is calculated using result of determination (S5).SELECTED DRAWING: Figure 1