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다자비교시험을 통한 화학혼화제 고형분량 시험법의 신뢰성 및 FT-IR 분석에 대한 효용성 평가

A Round Robin Study of Solid Content Test and Applicability Estimation of FT-IR Analysis for Chemical Admixtures

  • 김진철 (한국도로공사 도로교통연구원) ;
  • 유혁진 (한국SGS 건설시험연구원 건설재료연구.시험센터) ;
  • 김홍삼 (한국도로공사 도로교통연구원) ;
  • 박고은 (한국도로공사 도로교통연구원)
  • 투고 : 2015.07.16
  • 심사 : 2015.09.03
  • 발행 : 2015.12.30

초록

콘크리트용 화학혼화제의 인수검사 시험법에 대한 국내외 기준을 살펴보고, 한국도로공사에서 활용 중인 고형분량을 대상으로 다자비교시험에 의한 통계분석을 통하여 시험법의 신뢰성을 검증하였다. 또한 FT-IR을 활용하여 다성분 조성 화학혼화제의 기기분석 효용성을 검증하였다. 시험결과의 이상치를 검정하는 Cochran, Grubbs 및 Dickson의 Q 검정을 실시하였으며, KS A ISO 5725-2의 절차에 따른 재현표준편차 및 반복표준편차는 각각 0.25 및 0.09%으로 나타나 시험방법의 신뢰성을 확인할 수 있었다. 또한 혼화제 시료상태에 따라 FT-IR 특성피크가 큰 차이를 나타내므로 건조시료에 의한 관리가 필요하였으나, 2종 이상 원료가 포함된 다성분 혼화제의 FT-IR 특성피크는 큰 차이가 없어 기기분석의 효용성을 확인할 수 없었다.

Acceptance criteria for chemical admixtures of cement concrete were investigated in domestic and international specifications. The reliability was verified for solid content test method of chemical admixture examined statistical analysis by round robin test. The applicability of FT-IR spectroscopy for qualitative measurement of multi-compound chemical admixtures verified. From solid content experimental results, outlier analysed using Cochran, Grubbs and Dickson's Q test. Repeatability and reproducibility standard deviation for solid content results showed 0.25 and 0.098% respectively according to KS A ISO 5725-2 procedure, it can be confirmed reliability of test methods. FT-IR spectrum of liquefied or oven-dried chemical admixtures condition showed big differences. It is needed that the FT-IR analysis is performed on dry material. However there's no difference with the applicability of FT-IR spectroscopy for multi-compound chemical admixtures. So the utility of method analysis could not identify.

키워드

참고문헌

  1. KS F 2560, "Chemical Admixtures for Concrete", Korean Agency for Technology and Standards, 2007. pp.1-3.
  2. ASTM C 494, "Standard Specification for Chemical Admixtures for Concrete", Annual Book of ASTM Standards, Vol. 04.01, 2010.
  3. EN 934-1, "Admixtures for Concrete, Mortar and Grout : Part 1. Common Requirements", European Committee for Standardization, 2008.
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  10. KS Q ISO 13528:2009, "Statistical Methods for Use in Proficiency Testing by Interlaboratory Comparisons", Korean Agency for Technology and Standards, 2009.
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