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Engineering Performance and Applicability of Environmental Friendly Porous Concrete for a Marine Ranch Using Steel Industry By-products

철강산업 부산물을 활용한 해양목장 조성용 친환경 다공질 콘크리트의 공학적 성능 및 적용성

  • Lee, Byung-Jae (Dept. of Civil Engineering, Chungnam National University) ;
  • Jang, Young-Il (Dept. of Construction Engineering Education, Chungnam National University) ;
  • Kim, Yun-Yong (Dept. of Civil Engineering, Chungnam National University)
  • Received : 2012.10.22
  • Accepted : 2012.12.12
  • Published : 2013.02.28

Abstract

The steel industry, a representative industry that significantly consumes raw materials and energy, produces steel as well as a large amount of by-product steel slag through the production process. The vast habitat foundation of marine life has been destroyed due to recent reckless marine development and environment pollution, resulting in intensification of the decline of marine resources, and a solution to this issue is imperative. In order to propose a method to recycle large amounts of by-product slag into a material that can serve as an alternative to natural aggregate, the engineering properties and applicability for each mixing factor of environment friendly porous concrete as a material for the composition of marine ranches were evaluated in this study. The test results for percentage of voids per mixing ratio revealed that the margin of error for all conditions was within 2.5%. The compressive strength test results showed that the most outstanding environmental friendly porous concrete can be manufactured when mixing 30% slag aggregate and 10% specially treated granular fertilizer for the optimum volume fraction. As concrete for marine applications, the best seawater resistance was obtained with mixing conditions for high compression strength. An assessment of the ability to provide a marine life habitat foundation of environmentally friendly porous concrete showed that a greater percentage of voids facilitated implantation and inhabitation of marine life, and the mixing of specially treated granular fertilizer led to active initial implantation and activation of inhabitation. The evaluation of harmfulness to marine life depending on the mixture of slag aggregate and specially treated granular fertilizer revealed that the stability of fish is secured.

철강산업은 다량의 원료와 다량의 에너지를 소비하는 대표적인 업종으로 생산 공정을 거치면서 철강생산과 더불어 부산물인 철강슬래그를 다량 발생시킨다. 또한, 근래 무분별한 해양개발 및 환경오염 등으로 광대한 해양생물의 서식기반이 소실되어 수산자원의 감소현상이 심화되고 있어 이에 대한 대책이 시급한 실정이다. 따라서 이 연구에서는 다량 부산되는 복합슬래그를 천연골재 대체재료로 재활용하는 방안 제시와 해양목장 조성용 소재로서의 친환경 다공질 콘크리트의 배합요인별 공학적 특성 및 적용성 검토연구를 수행하였다. 배합요인별 공극률 시험결과 모든 조건에서 오차범위 2.5%이내의 결과를 나타내었다. 압축강도 시험 결과 최적 혼입률은 복합슬래그골재 30%, 특수처리입상비료 10% 혼입시 가장 우수한 친환경 다공질 콘크리트 제조가 가능하였다. 해양 적용 콘크리트로서 해수저항성 역시 압축강도가 높은 배합조건이 가장 우수한 성능을 나타냈다. 친환경 다공질 콘크리트의 해양생물 서식기반 제공능력평가 결과, 공극률이 증가할수록 해양생물의 착상 및 서식이 용이하였으며, 특수처리입상비료 혼입시 초기 착상 및 서식활성화가 활발히 이루어짐을 확인하였다. 복합슬래그골재 및 특수처리입상비료의 혼입에 따른 해양생물에 대한 유해성 검토 결과 어류에 대한 안정성은 확보되는 것으로 확인하였다.

Keywords

References

  1. Korea Iron & Steel Association, Statistical Data, http://www. kosa.or.kr, Accessed on October 5, 2012.
  2. Choi, S. W., Kim, V., Chang, W. S., and Kim, E. Y., "The Present Situation of Production and Utilization of Steel Slag in Korea and Other Countries," Magazine of the Korea Concrete Institute, Vol. 19, No. 6, 2007, pp. 28-33.
  3. Ministry of Environment, Environment-Statistical-Portal, "Waste Generation and Disposal of the Nationwide in 2010," http://stat.me.go.kr, Accessed on October 10, 2012.
  4. Korea Waste Association, A Study on Improvement of Iron Slag Recycling System, Ministry of Environment, 2011, pp. 1-130.
  5. Kim, H. S., Lee, J. W., Kim, J. R., and Yoon, H. S., "Estimation of Countermeasures and Efficient Use of Volume of Artificial Reefs Deployed in Fishing Grounds," Journal of the Korean Society for Marine Environmental Engineering, Vol. 12, No. 3, 2009, pp. 181-187.
  6. Park, K. B. and Noguchi, T., "Environmental Concern Concrete and Reinforced Concrete Construction for Low Carbon Green Growth," Magazine of the Korea Concrete Institute, Vol. 21, No. 4, 2009, 2009, pp. 44-49.
  7. Japan Concrete Institute, ECO Concrete Technical Committee Report, Japan Concrete Institute, 1995, pp. 56-58.
  8. Korea Concrete Institute, Special Concrete Engineering, Kimoondang Publishing Company, Seoul, Korea, 2004, pp. 243-281.
  9. Korea Concrete Institute, New Concrete Engineering, Kimoondang Publishing Company, Seoul, Korea, 2011, 932 pp.
  10. Sidney Mindess, J. Francis Young, and David Darwin, Concrete, Pearson, 2003, pp. 57-92.
  11. Park, S. B., "Development and Applications of Multiple Performance Concrete for Kelp Foorest Regeneration Using Recycled Aggregate of Waste Concrete," Ministry of Construction and Transportation, 2007, pp. 356-362.
  12. Duan, P., Shui, Z., Chen, W., and Shen, C., "Influence of Metakaolin on Pore Structure-Related Properties and Thermodynamic Stability of Hydrate Phases of Concrete in Seawater Environment," Construction and Building Materials, Vol. 36, 2012, pp. 947-953. (doi: http://dx.doi.org/10.1016/j.conbuildmat.2012.06.073)

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