EXPERIMENTAL STUDY ON CHLORIDE ION MEASUREMENT METHOD OF CONCRETE STRUCTURES BY FLUORESCENT X-RAY SPECTROMETER

Abstract

 This experimental study is to investigate a method for measuring chloride ion in concrete structures by the handy X-ray fluorescence spectrometer. First of all, in order to evaluate the accuracy of this measurement, the authors measured chloride ion in the specimen, and evaluated the correlation with the conventional chemical analysis (ion chromatography) method. Secondly, we examined the method of analyzing the salinity of the surface and interior of actual structures under an airborne chloride environment. As a result, it was revealed that there was a high correlation between this method and the conventional ion chromatography method, and it was proved that this device could be used to evaluate the chloride ion concentration quantitatively in practical concrete structure. Furthermore, it was shown that the combination of this device and the drilling method can be used to evaluate the surface and interior salinity profiles of structures quickly and simply in the practical field.