Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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A identification of sprayed fire-resistive materials by near-infrared spectroscopy

근적외선 분광 분석법을 이용한 내화뿜칠재 일치성분석

  • Cho, Nam-Wook (Korea Institute of Construction Technology) ;
  • Shin, Hyun-Jun (Korea Institute of Construction Technology) ;
  • Cho, Won-Bo (College of Pharmacy, Dongduck Women's University) ;
  • Lee, Seong-Hun (College of Pharmacy, Dongduck Women's University) ;
  • Rie, Dong-Ho (Fire Disaster Prevention Research Center-University of Incheon) ;
  • Kim, Hyo-Jin (College of Pharmacy, Dongduck Women's University)
  • Received : 2010.11.22
  • Accepted : 2011.02.17
  • Published : 2011.04.25
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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.

국내에서는 건물의 화재 방지를 위하여 인증된 내화뿜칠재를 사용하도록 규정되어 있다. 하지만 일부 현장에서는 성능이 없는 흡음뿜칠재을 사용함으로 해서 내화구조 부실시공의 원인이 되고 있다. 따라서 성능이 인정된 내화 뿜칠재와 일반 흡음뿜칠재를 현장에서 분석하여 적정 시공 여부를 확인하는 방법을 제시하고자 한다. 이에 본 연구에서는 성능이 인정된 내화 뿜칠재 9종과 정상 내화 뿜칠재 및 내화성능이 없는 일반 흡음뿜칠재 3종을 비교 측정하였다. 측정하기 전에 분석시료를 대상으로 mill을 사용하여 powder로 전처리를 하였으며 현장에 접근성이 용이한 NIR을 사용하였다. 측정은 NIR중에서 FTNIR을 사용하였으며, 측정 모듈은 적분구(integrating sphere)를 사용하여 측정하였다. 이 측정된 흡수 스펙트럼은 통계 처리 방법 중에서 주성분 분석법인 PCA 기법으로 분석함으로 해서 정상과 비정상 내화뿜칠재를 판별이 가능 함을 확인하였다.

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