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Compressive Strength and Ecological Characteristics of Mortars Using Expanded Vermiculite Absorbing Bacteria

박테리아를 흡착한 팽창질석 기반의 친생태 모르타르 개발

  • 윤현섭 (경기대학교 일반대학원 건축공학과) ;
  • 정승배 (경기대학교 일반대학원 건축공학과) ;
  • 양근혁 (경기대학교 플랜트.건축공학과) ;
  • 이상섭 (경기대학교 생명과학과) ;
  • 이재영 ((주)그랜드코단)
  • Received : 2016.05.30
  • Accepted : 2016.06.15
  • Published : 2016.06.30

Abstract

The objective of this study is to evaluate the compressive strength development and ecological characteristics of mortars using expanded vermiculite absorbing bacteria as a fundamental investigation to develop precast eco-concrete products. For bacterial growth under the high-alkalinity and high-dried environments within hardened mortars and for creating plant growth function to mortars, Bacillus alcalophilus and Rhodoblastus acidophilus were separated and cultured. The cultured bacteria were absorbed into expanded vermiculite selected for bacteria shelter. The expanded vermiculite absorbing bacteria was then added into mortar mixture as a volumetric replacement of fine aggregate. Test results showed that the developed technology is very effective in enhancing the plant growth onto the hardened mortars and reducing the COD and T-N concentration in raw water. The optimum replacement level of expanded vermiculite absorbing bacteria can be recommended to be less than 10% considering the compressive strength development and cost of mortars along with the ecological effectiveness.

본 연구에서는 에코 프리캐스트 콘크리트 제품 개발을 위한 기초 연구로서 박테리아를 흡착한 팽창질석 기반의 친생태 모르타르를 개발하였으며, 압축강도 발현 및 생태환경영향 평가를 실시하였다. 경화된 모르타르의 극건조 환경 및 강알칼리성 환경에서 생장이 가능하며, 식물생장성 증대 효과를 갖는 Bacillus alcalophilus와 Rhodoblastus acidophilus를 분리 및 배양하였다. 배양이 완료된 박테리아는 생장처 제공을 위한 재료로서 선택된 팽창질석에 흡착하였으며, 이를 배합시 골재의 체적 대비 혼입하여 모르타르를 제작하였다. 평가 결과 친생태 모르타르는 COD 및 T-N 수질정화능력 및 식물생장증대에 효과를 보였다. 모르타르의 압축강도 발현 및 비용적 측면을 고려했을 때, 박테리아 기반 팽창질석의 최적 치환율은 최대 10% 이하가 추천될 수 있었다.

Keywords

References

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Cited by

  1. Development of Eco-Block for Grass Growth based on Expanded Vermiculite Absorbing Bacteria vol.4, pp.3, 2016, https://doi.org/10.14190/JRCR.2016.4.3.316