Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on the Strength Properties and Life Cycle Assessment of Recycled Fine Aggregate Concrete

순환잔골재 혼입 콘크리트의 강도 특성 및 전과정 환경영향 평가 연구

  • Choi, Won-Young (Korea Institute of Civil engineering and Building Technology) ;
  • Kim, Sang-Heon (Korea Institute of Civil engineering and Building Technology) ;
  • Lee, Sea-Hyun (Korea Institute of Civil engineering and Building Technology) ;
  • Jeon, Chan-Soo (Korea Institute of Civil engineering and Building Technology)
  • 최원영 (한국건설기술연구원 국민생활연구본부) ;
  • 김상헌 (한국건설기술연구원 국민생활연구본부) ;
  • 이세현 (한국건설기술연구원 국민생활연구본부) ;
  • 전찬수 (한국건설기술연구원 국민생활연구본부)
  • Received : 2019.04.18
  • Accepted : 2019.06.11
  • Published : 2019.06.30
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Abstract

The purpose of this study is to confirm the strength characteristics of concrete according to the mixing ratio of recycled fine aggregates and to use it as basic data for the use of recycled fine aggregates in concrete. For this purpose, the target design compression strength was set at 27MPa. Considering practical use of recycled aggregate, the mixing ratio of recycled fine aggregate was set at 0, 30, 60, and 100%, and the unconfined concrete and hardened concrete were tested. The LCA method was used to evaluate the environmental impact of recycled fine aggregate concrete, and the effectiveness of recycled fine aggregate in the production of concrete was verified.

본 연구에서는 순환잔골재의 혼입률에 따른 콘크리트의 강도 특성을 실험을 통해 확인하고, 전과정평가(LCA, Life Cycle Assessmet) 기법을 이용하여 순환잔골재의 전과정 환경영향을 평가하여, 콘크리트를 제조함에 있어서 순환잔골재 사용의 유효성을 확인하여 순환골재 콘크리트 활용을 위한 기초적 자료로 사용하는 것을 목적으로 한다. 이를 위해, 목표설계기준압축강도는 27MPa로 하였으며, 순환골재 실용화를 고려하여 순환잔골재의 혼입률을 0, 30, 60, 100%로 설정하여 굳지 않은 콘크리트 및 굳은 콘크리트에 대한 실험을 통해 슬럼프, 공기량, 압축강도 등을 확인하였고, 순환잔골재의 전과정 환경영향을 평가하고 타 골재와 환경영향을 비교 분석 하였다.

Keywords

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Fig. 1. Grain size distribution ratio of recycled sand

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Fig. 2. Grain size distribution ratio of recycled coarse aggregate

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Fig. 3. Result of slump

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Fig. 4. Result of air contents

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Fig. 5. Result of compressive strength

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Fig. 6. Process of environmental impact assessment

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Fig. 7. Environmental impact comparison of aggregate

Table 1. Design of experiment

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Table 2. Physical properties of cement

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Table 3. Chemical properties of cement

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Table 4. Physical properties of aggregate

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Table 5. Physical properties of recycled aggregate

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Table 6. Mixing properties

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Table 7. Properties of superplasticizer

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Table 8. Compressive strength

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Table 9. LCI database

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Table 10. Environmental impact of transportation

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Table 11. Energy source & usage of manufacture

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Table 12. Environmental impact of manufacture

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Table 13. Environmental impact of recycled aggregate

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Table 14. Environmental impact comparison of aggregate

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References

  1. Choi, W.Y., Lee, S.H., Kim, S.H. (2017). A comparative study on the quality of recycled aggregate for concrete by crushing method, Journal of Korean Recycled Construction Resources Institute, 5(2), 121-129 [in Korean]. https://doi.org/10.14190/JRCR.2017.5.2.121
  2. Kim, H.J. (2010). Compressive Strength of Concrete with Different Substitution Ratio of Recycled Fine Aggregates, Jeju National University [in Korean].
  3. Kim, S.C., Park, D.K., Yoog, Y.C. (2016). Characteristic of cementitious mortar using high volume of recycled fine aggregate, Journal of Korean Recycled Construction Resources Institute, 4(3), 235-242 [in Korean]. https://doi.org/10.14190/JRCR.2016.4.3.235
  4. Kim, S.H., Jeon, C.S., Lee, S.H. (2018). An experimental study on the estimation of compressive strength and the physical properties of recycled aggregate concrete of fixed slump, Journal of Korea Institute for Structural Maintenance and Inspection, 22(2), 51-58 [in Korean]. https://doi.org/10.11112/JKSMI.2018.22.2.051
  5. Korea Institute of Civil engineering and Buiding Technology. (2017). Final Report of Integrated Development of $CO_2$ Management Technology for Construction Materials, Ministry of Land, Infrastructure and Transport.
  6. KS F 2405. (2017). Standard test Method for Compres sive Strength of Concrete.
  7. KS F 2573. (2014). Recycled Aggregate for Concrete.
  8. KS F 4009. (2016). Ready-Mixed Concrete.
  9. Ministry of Land, Infrastructure and Transport. (2017). Recycled Aggregate Quality Standard, Ministry of Land, Infrastructure and Transport, 2017-1711.