Development of Concrete Diagnosis Technology by Chemometrics Method at Near-infrared Region
By K. Toda, T. Kurata, T. Kita and T. Uomoto
Concrete Journal, Vol.45, No.11, Nov. 2007
- Synopsis
- Near-infrated spectroscopy is expected as a useful technique for a concrete deterioration diagnosis. Deteriorations on the concrete surface could be detected non-destructively in a short time by this technique. However, the detection varies with the complex material composition and environment due to exposed conditions. Therefore, the obtained spectroscopy analysis should be considered the environmental effect of concrete surface, especially such as carbonation. In this study, in order to improve the problem, Chemometrics technology is applied as a new diagnosis method. Chemometrics method is known as a technique in the field of chemical analysis. This method is used for analyzing a huge paramater such as chromatography and mass spectrometers. The result in the inspection for concrete diagnosis from the spectral analysis suggests the possibility of practical use. In the case that the carbonation and the penetration of the chloride ion occur on the concrete surface at a time, Chemometrics method is confirmed to detect the amount of chloride ion accurately. After all, this method is expected as a normal non-destructive test for the inspection of the concrete diagnosis in the near future.
- Keywords:
- spectral method, chloride attack, carbonation, chemometrics
