DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD FOR CONCRETE STRUCTURE

摘要

This aims to provide a diagnostic device and a diagnostic method for a concrete structure, which can measure the surface constitution concentration of an outdoor concrete structure practically precisely in noncontact and nondestructive manners. In the diagnostic method, a reference body having individual components, in which the concentrations of constituents existing on the surface of the concrete structure are made different to individual levels, is arranged under the environment, in which the surface of the reference body is irradiated with the natural light having the same or substantially the same spectrum as that of a natural light toemit the surface of the concrete structure to be diagnosed. The light, which is reflected on the surface of the concrete structure and the surface of the reference body, is separated into individual wavelengths and photographed, under the environment, in which the surface of the concrete structure and the surface of the reference body are irradiated with the natural light of the same or substantially the same spectrum as that of the natural light. On the basis of the photographic result, the absorbance of each constitution concentration and each wavelength of the light reflected by each component of the reference body is then calculated, and a function having the absorbance of each wave as a variable and the surface constitution concentration as a functional value is calculated on the basis of the calculated absorbance of each constitution concentration and each wavelength and each known constitution concentration of the reference body. On the basis of the photographic result, the absorbance of each wavelength of the light reflected on the surface of the concrete structure is calculated, and the surface constitution concentration of the concrete structure is determined as a functional value by using the calculated absorbance of each wavelength as the variable of the function.