Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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An Academic Assessment of Lightweight Concrete Properties for Rhamen-type Modular Building Walls

라멘식 모듈러 건축물 벽체 적용을 위한 경량 콘크리트의 공학적 특성

  • Jung, Ui-In (Future Urban Convergence Research Institute, KongJu National University) ;
  • Lee, Min-Jae (EPD Team, Silkroad C&T R&D Center) ;
  • Ju, Young-Gil (EPD Team, Silkroad C&T R&D Center) ;
  • Kim, Bong-Joo (Department of Green Smart Architectural Engineering, KongJu National University)
  • Received : 2023.01.03
  • Accepted : 2023.09.11
  • Published : 2023.10.20
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Abstract

This research embarked on a comprehensive examination of the engineering characteristics of lightweight concrete intended for implementation in rhamen-type modular building walls. The concrete was formulated utilizing bottom ash and coated EPS beads, in accordance with the Korea Construction Standards Center(KCS) 14 20 20 "Lightweight Aggregate Concrete". Our findings articulate that while EPS beads tend to diminish the compressive strength of the lightweight concrete, they concurrently contribute to a notable reduction in unit mass. The porous nature of the bottom ash endows the material with diminished thermal conductivity. Significantly, a mixture containing 50% EPS beads and 50% BA20 aggregates, replacing half of the coarse aggregates, was found to meet the standard specifications.

본 연구에서는 라멘식 모듈러 건축물의 비내력 벽체 적용성 검토를 목적으로 국가건설기준센터 KCS 14 20 20 경량골재 콘크리트에서 규정하는 성능을 기준으로 바텀애시와 코팅된 발포폴리스티렌 비드를 활용하여 경량 콘크리트 실험을 진행하였다. 코팅된 발포폴리스티렌 비드를 사용할 경우, 경량 콘크리트 강도 성능에 부정적인 영향을 주는 것으로 나타났다. 하지만 단위 질량의 감소와 단열성능에 긍정적인 영향을 주는 것으로 나타났고, 바텀애시의 경우 기존 연구와 마찬가지로 내부 공극 특성으로 인하여 열전도율 값이 낮게 나타났다. 이를 통하여 발포폴리스티렌 비드 50%와 10~20mm의 바텀애시 50%를 굵은 골재로 대체하는 배합이 표준시방서의 단위 질량과 설계기준 강도를 만족하며 가장 열전도율이 낮은 배합으로 나타났다.

Keywords

Acknowledgement

This work is supported by the Korea Agency for Infrastructure Technology Advancement(KAIA) grant funded by the Ministry of Land, Infrastructure and Transport(Grant 21CTAP-C163578-01).

References

  1. Hwang JS, Choi SH, Lee JS, Kim YS. Development of bill of service framework for modular housing construction. Korean Journal of Construction Engineering and Management. 2014 Sep;15(5):138-46. https://doi.org/10.6106/KJCEM.2014.15.5.138 
  2. Yang SC, Lee JS. Evaluation on the fire resistance performance for high-rise modular walls. Journal of the Korea Institute for Structural Maintenance and Inspection. 2019 Jul;23(4):15-22. https://doi.org/10.11112/jksmi.2019.23.4.15 
  3. Nam SH, Park HG, Kim KR. A study on development of owner's standard specification structure for modular building. Korean Journal of Construction Engineering and Management. 2019 May;20(3):12-21. http://dx.doi.org/10.6106/KJCEM.2019.20.3.012 
  4. Kim JY, Lee JK. A basic study on the application of modular construction- Focused on the analysis of case study -. Journal of the Korean Housing Association. 2014 Aug;25(4):39-46. http://dx.doi.org/10.6107/JKHA.2014.25.4.039 
  5. Jeong JS, Yoon SH. Method to quantify the effect of apartment housing design parameters on outdoor thermal comfort in summer. Building and environment. 2012 Jul;53:150-8. https://doi.org/10.1016/j.buildenv.2012.01.012 
  6. Kim MY, Kim HG, Park JC. Insulation performance analysis of vulnerable parts of thermal bridge and condensation in modular buildings. Korean Journal of Construction Engineering and Management. 2021 May;22(3):31-9. https://doi.org/10.6106/KJCEM.2021.22.3.031 
  7. Kim JW, Yang KH, Mun JH. Evaluation on mechanical properties and thermal resistance of lightweight concrete using bottom ash aggregates and expanded polystyrene bead. Journal of the Korea Concrete Institute. 2021 Dec;33(6):569-77. https://doi.org/10.4334/JKCI.2021.33.6.569 
  8. Lee JC, Seo CH. An experimental study for the structural lightweight aggresate concrete with expanded polystyrene beads. Journal of the Architectural Institute of Korea Structure & Construction. 2004 Jun;20(6):91-8. 
  9. Lee JC, Kim DH, Ji SW, Chung KR, Seo CH. An experimental study on the properties of lightweight concrete contained expanded polystyrene beads. Journal of the Architectural Institute of Korea Structure & Construction. 2003 Jul;19(7):111-8. 
  10. KS F 2527. Aggregates for concrete. Seoul (Korea): Korean Agency for Technology and Standards; 2022. 12 p. 
  11. KCS 14 20 20. Lightweight aggregate concrete. Goyang (Korea): Korea Construction Standards Center; 2022. 11 p. 
  12. KS F 2409. Standard test method for unit weight and air content(gravimetric) of fresh concrete. Seoul (Korea): Korean Agency for Technology and Standards; 2021. 1-6 p. 
  13. KS F 2594. Method of test for slump flow of fresh concrete. Seoul (Korea): Korean Agency for Technology and Standards; 2021. 3 p. 
  14. KS F 2421. Standard test method for air content of fresh concrete by the pressure method(Air receiver method). Seoul (Korea): Korean Agency for Technology and Standards; 2021. 6 p. 
  15. KS F 2405. Test method for compressive strength of concrete. Seoul (Korea): Korean Agency for Technology and Standards; 2022. 3 p. 
  16. KS F 2423. Standard test method for tensile splitting strength of concrete. Seoul (Korea): Korean Agency for Technology and Standards; 2021. 3 p. 
  17. KS L 9016. Test methods for thermal transmission properties of thermal insulations. Seoul (Korea): Korean Agency for Technology and Standards; 2022. 15 p. 
  18. Ahn TH, Park JB, Yoon HS, Yang KH. Evaluation on compressive strength development and thermal conductivity of cement pastes containing aerogels with hydrophilic surface treatment. Journal of the Korea Institute of Building Construction. 2018 Feb;18(1):51-7. https://dx.doi.org/10.5345/JKIBC.2018.18.1.051 
  19. Park JH, Jung HW, Yang IH. Characteristics of thermal conductivity of concrete containing fine bottom ash aggregates. Journal of the Korean Recycled Construction Resources Institute. 2020 Dec;8(4):596-603. https://dx.doi.org/10.14190/JRCR.2020.8.4.596