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KMID : 0385520110240020085
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Analytical Science & Technology
2011 Volume.24 No. 2 p.85 ~ p.93
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A identification of sprayed fire-resistive materials by near-infrared spectroscopy
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Cho Nam-Wook
Shin Hyun-Jun
Cho Won-Bo
Lee Seong-Hun
Rie Dong-Ho
Kim Hyo-Jin
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Abstract
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To protect the steel structure in a high story buildings from fire, the sprayed fire-resistive materials are applied during the construction. Current standard methods to check the quality of sprayed fire-resistive materials are real fire test in lab, which take a long time (several weeks) and expensive. In this study, a simple analytical method to check the quality of sprayed fire-resistive materials is developed using Near Infrared Spectroscopy (NIR). Total 9 kinds of sprayed fire-resisted materials and 3 kinds of normal sprayed material sets were used for the analysis. Each set of materials was 50 to 100 samples. Samples are grinded and make a fine powder. The spectral data acquisition was carried out using FT-NIR spectrometer with a integrating sphere. NIR methods successfully identify the sprayed fire resistive materials by a principle component analysis (PCA) after a vector normalization (SNV) pretreatment.
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KEYWORD
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NIR spectrometer, FT-NIR, Fire-resistive materials, PCA
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