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Optimized Mixing Design of Lightweight Aerated Concrete by Response Surface Analysis

반응표면분석법에 따른 경량기포콘크리트 최적배합 도출에 관한 연구

  • Lee, Sang-An (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Jung, Chan-Woo (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Kim, Wha-Jung (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Ahn, Jung-Hyun (School of Architecture and Civil Engineering, Kyungpook National University)
  • 이상안 (경북대학교 건축토목공학과부) ;
  • 정찬우 (경북대학교 건축토목공학과부) ;
  • 김화중 (경북대학교 건축토목공학과부) ;
  • 안정현 (경북대학교 건축토목공학과부)
  • Published : 2009.12.31

Abstract

This paper presents the optimized mixing design of lightweight aerated concrete using hydrogen peroxide. Design of experiments in order to the optimized mixing design was applied and commercial program (MINITAB) was used. Statistical analysis was used to Box-Behnken (B-B) method in response surface analysis. The influencing factors of experimental are unit cement content, water ratio and hydrogen peroxide ratio. According to the analysis of variance, at the hardened state, water ratio and hydrogen peroxide ratio affects on dried density, compressive strength and bending strength of lightweight aerated concrete, but unit cement content affects on only dried density. In the results of response surface analysis, to obtain goal performance, the optimized mixing design for lightweight aerated concrete using hydrogen peroxide were unit cement content of 800 kg/$m^3$, water ratio of 44.33% and hydrogen peroxide ratio of 10%.

이 논문에서는 과산화수소를 사용한 경량기포콘크리트의 최적배합비를 제안하고 있다. 최적배합을 도출하기 위해 상용프로그램인 MINITAB을 사용하여 실험계획법을 적용하였다. 통계적 분석방법은 반응표면분석법 중 하나인 Box Behnken(B-B)계획법으로 하였다. 실험시 고려한 영향인자로는 단위시멘트량, 물시멘트비, 과산화수소비를 설정하였다. 분산분석에 따르면 경화상태에서 경량기포콘크리트의 물시멘트비와 과산화수소비는 절건밀도, 압축강도, 휨강도에 유의차가 있고, 단위시멘트량은 절건밀도에만 유의차가 있는 것으로 나타났다. 반응표면분석의 결과에서 과산화수소를 사용한 경량기포콘크리트의 최적배합비는 단위시멘트량 800 kg/$m^3$, 물시멘트비 44.33%, 과산화수소비 10%로 도출되었다.

Keywords

References

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