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A identification of sprayed fire-resistive materials by near-infrared spectroscopy

근적외선 분광 분석법을 이용한 내화뿜칠재 일치성분석

  • Received : 2010.11.22
  • Accepted : 2011.02.17
  • Published : 2011.04.25

Abstract

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.

Keywords

NIR spectrometer;FT-NIR;Fire-resistive materials;PCA

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