Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Influence of Fly Ash on Life-Cycle Environmental Impact of Concrete

플라이애시가 콘크리트의 전과정 환경영향에 미치는 효과

  • Jung, Yeon-Back (Department of Architectural Engineering, Kyonggi University Graduate School) ;
  • Yang, Keun-Hyeok (Department of Plant.Architectural Engineering, Kyonggi University) ;
  • Choi, Dong-Uk (Department of Architectural Engineering, Hankyong National University)
  • Received : 2014.05.22
  • Accepted : 2014.09.19
  • Published : 2014.12.20
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Abstract

In order to quantitatively evaluate the effect of fly ash (FA) as partial replacement of cement on the life-cycle environmental impact of concrete, a comprehensive database including 4023 laboratory mixes and 2120 plant mixes was analyzed. The environmental loads on the life-cycle assessment were quantitatively converted into environmental impact indicators through categorization, characterization, normalization and weighting process. The life-cycle environmental impacts of concrete could be classified into three categories including global warming, photochemical oxidant creation and abiotic resource depletion. Furthermore, these environmental impacts of concrete was decreased with the increase of the replacement level of FA and governed by the unit content of ordinary portland cement (OPC). As a result, simple equations to assess the environmental impact indicators could be formulated as a function of the unit content of binder and the replacement level of FA.

혼화재로서 플라이애시가 콘크리트의 전과정 환경영향에 미치는 효과를 정량적으로 평가하기 위하여, 4023개의 실내배합 및 2120개의 레미콘 배합을 분석하였다. 전과정 환경 평가에서 환경부하는 분류화, 특성화, 정규화 및 가중치 단계를 거쳐 정량적인 환경영향 지표로 환산되었다. 콘크리트 전과정 환경영향은 주로 지구 온난화, 광화학 산화 생성물 및 무생물 자원고갈의 세 범주로 분류될 수 있었다. 또한, 콘크리트의 환경영향 지표들은 플라이애시 치환율의 증가와 함께 감소하였으며, 대부분 보통 포틀랜드 시멘트의 양에 의해 결정되었다. 이를 고려하여, 콘크리트의 환경영향 지표들은 단위 결합재 양 및 플라이애시 치환율의 함수로 간단하게 모델링 될 수 있었다.

Keywords

References

  1. Task Group 3.3. Environmental design. Switzerland: International Federation for Structural Concrete (fib); 2004. 74 p.
  2. Malhotra VM. Introduction: Sustainable development and concrete technology. ACI Concrete International. 2002 Jul;24(7):22.
  3. Korea Concrete Institute. Concrete and Environment. Seoul: Kimoondang Publishing Company: c2011. Chapter 12, Environmental management of concrete and concrete structures: p.224-44. Korean.
  4. IgCC Public Comment Hearing Committee. International green construction code. Washington, DC: International Code Council; 2012. 147 p.
  5. CEN. CEN Guide 4: Guide for addressing environmental issues in product standards. 3rd ed. Brussels: European Committee for Standardization: 2008. 36 p.
  6. Choi DS, Lee ME, Cho KH. A study on environmental impact assessment in domestic construction industry using life cycle. Journal of KIAEBS. 2012 Mar;6(1):46-55.
  7. Korea Concrete Institute. Concrete and Environment. Seoul: Kimoondang Publishing Company: c2011. Chapter 1, Reduction of $CO_2$ in the cement industry: p.16-30. Korean.
  8. Korea Concrete Institute. Concrete and Environment. Seoul: Kimoondang Publishing Company: c2011. Chapter 6, Status and recycling of power industrial by-products: p.100-22. Korean.
  9. ISO. Environmental management-Life cycle assessment-Principles and Framework, ISO 14040. Geneva: International Standardization Organization (ISO); 2006. 20 p.
  10. Korean Ministry of Environment. Hankookhyeng Hwangyeong Yeonghyang Pyeonggajisu Bangbeopron [Korean environmental impact assessment index methodology]. 2003. 166 p. Korean.
  11. Yang KH, Moon JH. Design of supplementary cementitious materials and unit content of binder for reducing CO2 emission of concrete. Journal of Korea Concrete Institute; 2012 Oct;24(5):597-604. https://doi.org/10.4334/JKCI.2012.24.5.597
  12. KEITI. Korea LCI Database Information Network [Internet]. Seoul: KEITI; 2014 Jun [cited 2014 Jun 23]. Available from: http://www.edp.or.kr/lci/lci_db.asp
  13. Sakai K, Kawai K. JSCE Guidelines for Concrete No.7: Recommendation of environmental performance verification for concrete structures. Japan Society of Civil Engineering; c2006. 576 p.
  14. Baumann H, Rydberg T. Lifecycle Assessment: A comparison of three methods for impact analysis and evaluation. Journal of Cleaner Production. 1994 Mar;2(1):13-20. https://doi.org/10.1016/0959-6526(94)90020-5
  15. Yang KH, Song JK, Song KI. Assessment of $CO_2$ reduction of alkali-activated concrete. Journal of Cleaner Production. 2013 Jan;39(1):265-72. https://doi.org/10.1016/j.jclepro.2012.08.001
  16. Yang KH, Seo EA, Jung YB, Tae SH. Effect of ground granulated blast-furnace slag on life-cycle environmental impact of concrete. Journal of the Korea Concrete Institute. 2014 Feb;26(1):13-21. https://doi.org/10.4334/JKCI.2014.26.1.013
  17. European Commission. European reference Life-Cycle Database Information Network [Internet]. Ispra: European Commission; 2014 Jun [cited 2014 Jun 23]. Available from: http://elcd.jrc.ec.europa.eu/ELCD3/

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