Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Strength and Water Purification Characteristics of Effective Microorganism-applied Volcanic Ash Block

유용미생물을 적용한 화산재 블록의 강도 및 수질정화 특성

  • 이충원 (강원대학교 석재복합건설신소재연구센터) ;
  • 장동수 (강원대학교 대학원 지역건설공학과) ;
  • 박성용 (강원대학교 대학원 지역건설공학과) ;
  • 최중대 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 김용성 (강원대학교 농업생명과학대학 지역건설공학과)
  • Received : 2013.02.21
  • Accepted : 2013.03.26
  • Published : 2013.03.31
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Abstract

The aim of this study is to investigate strength and water purification characteristics of effective microorganism-applied volcanic ash block using flexural strength test and water quality analysis. The specimens were prepared with volcanic ash from Mt. Baekdusan and Mt. Hallasan, and cement as the ratios of 3.5:1, 4.0:1, 4.5:1, 5.0:1 with and without metakaolin. Flexural strength degraded with increasing of the amount of volcanic ash, and increased with addition of metakaolin as a binder. Based on these results, the optimal ratio for fabricating volcanic ash-cement mixture block is determined as 3.5:1 with metakaolin. Furthermore, from water quality analysis on contaminated water, removal ability of effective microorganism-applied volcanic ash-cement mixture block and caged volcanic ash block against T-N, T-P and SS was highly evaluated because of adsorption due to the large specific surface area of volcanic ash. Hence, volcanic ash-cement mixture block and caged volcanic ash block possibly contribute to water purification.

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References

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