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Title |
An Experimental Study on the Application of LIBS for the Diagnosis of Concrete Deterioration
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Authors |
우상균(Sang-Kyun Woo) ; 추인엽(In-Yeop Chu) ; 윤병돈(Byong-Don Youn) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.6.140 |
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Keywords |
탄산화 ; 염화물 ; 콘크리트 열화 진단 ; 레이저유도분광분석법 ; 황산염 Carbonation ; Chloride ; Concrete deterioration diagnosis ; LIBS ; Sulfate |
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Abstract |
It is laser induced breakdown spectroscopy(LIBS) that enables qualitative and quantitative analysis of the elements contained in unknown specimen by comparing the wavelength characteristics of each element obtained from the spectral analysis of the standard specimen with the wavelength analysis results from unknown specimens. In this study, the applicability of LIBS to the analysis of major deterioration factors affecting concrete durability was experimentally analyzed. That is, the possibility of applying LIBS to the diagnosis of concrete deterioration by studying the quantitative detection of harmful deteriorating factors on chloride, sulfate and carbonated mortar specimens using LIBS was studied. As a result of LIBS test for each chloride and sulfate specimen, the LIBS spectral wavelength intensity of chlorine and sulfur ions increased linearly with increasing concentration. Carbon ion LIBS spectral wave intensities of carbonated specimens increased nonlinearly over the duration of carbonation exposure. From the above results, it can be partially confirmed that LIBS can be applied to the diagnosis of concrete deterioration. In case of concrete carbonation, it is presumed that carbon content is contained in the cement itself and is different from the detection of chloride and sulfate specimen. Therefore, it is considered that more various parameter studies should be performed to apply LIBS to concrete carbonation.
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