본문 바로가기
KERD
논문KCI 등재

중성화와 염화물 침투가 동시에 발생하는 철근콘크리트 단면의 매개변수 분석

Parametric Analysis for the Simultaneous Carbonation and Chloride Ion Penetration in Reinforced Concrete Sections

김소의|지광습|배경태|곽동우|주흥길
한국구조물진단유지관리공학회 (The Korea Institute For Structural Maintenance and Inspection)|2016.09|한국구조물진단유지관리공학회 논문집 (Journal of The Korea Institute for Structural Maintenance and Inspection)|제20권 제5호|pp. 66-74

0

조회

0

다운로드

1

인용

0

참고문헌

키워드

CorrosionOffshore structures해양구조물부식CarbonationChloride ingress염화물 침투중성화앵커 연결부Anchor joint
주제분류안전공학

초록

본 논문에서는 철근 콘크리트 단면에서 동시에 진행되는 중성화와 염화물 침투에 의해 진행되는 내구성 문제에 대해 서로 다른 콘크리트의 특성과 주변 환경의 영향을 매개변수 분석을 통해 수행하였다. 이를 위해 콘크리트의 미세 공극 구조의 변화 및 중성화와 염소이온 투과의 상호 화학반응이 직접 지배방정식 형태로 고려된 최신 모델을 사용하여 이 복합작용의 분석을 수행하였다. 이산화탄소, 염소이온, 열 및수분의 복합적인 이동이 직접 고려되었다. 문헌상의 실험 데이터를 분석하여 모델의 입력변수를 결정하고 계산의 편의성을 증진시켰다. 이 모델을 상용유한요소 프로그램인 COMSOL의 사용자 모듈형태로 개발 하였다. 이 상호작용에 영향을 미치는 물-바인더비 (w/b), 골재-바인더비(a/b), 플라이에쉬 함량, CSH 함량, 콘크리트 초기공극률 등을 정량적으로 분석하였다. 결과에 의하면, 중성화와 염소이온 침투의 상호작용은다양한 재료 물성치에 영향을 받는다.

Abstract

The objective of this study is the investigation of the influence of carbonation on the penetration of chloride ions in reinforced concrete sectionsfor different mix proportions and environmental conditions. A comprehensive numerical model based on the change of the pore structure and thechemical equilibrium was used for this combined action of carbonation and chloride ingress. The empirical formulae of some parameters in this modelare estimated according to numerous experimental data. And, a set of data analysis is carried out to simplify the estimation of model variables to reducethe computational cost. A coupled simulation of the transports of carbon dioxide, chloride ions, heat and moisture is carried out. Then, the parametricanalysis is given and the numerical results show that the effect of carbonation of the free chloride ingress is significant and depends on the binder typesand concrete mix proportion.

참고문헌 (37)

  1. Backus, J., "Exposure of Mortars to Cyclic Chloride Ingress and Carbonation", Advances in Cement Research, 25(1), pp.3~11 (2013)
  2. Bastidas-Arteaga, E., "A Comprehensive Probabilistic Model of Chloride Ingress in Unsaturated Concrete", Engineering Structures, 33(3), pp.720~730 (2011)
  3. Bazant, Z., "Drying of Concrete as a Nonlinear Diffusion Problem", Cement and Concrete Research, 1(5), pp.461~473 (1971)
  4. Bazant, Z., "Nonlinear Water Diffusion in Nonsaturated Concrete", Materials and Structures, 5(1), pp.546~552 (1972)
  5. Chindaprasirt, P., "Pore Structure Changes of Blended Cement Pastes Containing Fly Ash, Rice Husk Ash, and Palm Oil Fuel Ash Caused by Carbonation", Journal of Materials in civil Engineering, 21(11), pp.666~671 (2009), ASCE
  6. Delnavaz, A., "The Assessment of Carbonation Effect on Chloride Diffusion in Concrete Based on Artificial Neural Network Model", Magazine of Concrete Research, 64(10), pp.877~884 (2012)
  7. Dong, B., "Electrochemical Impedance Measurement and Modeling Analysis of the Carbonation Behavior for Cementititous Materials", Construction and Building Materials, 54, pp.558~565 (2014)
  8. Gerven, T., "Effects of Carbonation and Leaching on Porosity in Cement-Bound Waste", Waste Management, 27(7), pp.977~985 (2007)
  9. Ishida, T., "Modeling of Chloride Diffusivity Coupled with Non-Linear Binding Capacity in Sound and Cracked Concrete", Cement and Concrete Research, 39(10), pp.913~923 (2009)
  10. Lee, M., "Effects of Carbonation on Chloride Penetration in Concrete", ACI Materials Journal, 110(5), pp.559~566 (2013)
  11. Martin-Perez, B., "Numerical Solution of Mass Transport Equations in Concrete Structures", Computers and Structures, 79(13), pp.1251~1264 (2001)
  12. Metalssi, O., "Consequences of Carbonation on Microstructure and Drying Shrinkage of a Mortar with Cellulose Ether", Construction and Building Materials, 34, pp.218~225 (2012)
  13. Morandeau, A., "Investigation of the Carbonation Mechanism of CH and C-S-H in Terms of Kinetics, microstructure changes and moisture properties", Cement and Concrete Research, 56, pp.153~170 (2014)
  14. Morandeau, A., "Impact of Accelerated Carbonation on OPC Cement Paste Blended with Fly Ash", Cement and Concrete Research, 67, pp.226~236 (2015)
  15. Nakarai, K., "Multi-Scale Physicochemical Modeling of Soil Cementitious Material Interaction", Soils and Foundations, 46(5), pp.653~663 (2006)
  16. Ngala, V., "Effects of Carbonation on Pore Structure and Diffusional Properties of Hydrated Cement Pastes", Cement and Concrete Research, 27(7), pp.995~1007 (1997)
  17. Niu, D., "Computational Model of Gas Diffusion Coefficient in Concrete", Journal of Xian University of Architecture and Technology(Natural Science Edition), 39(6), pp.741~745 (2007)
  18. Papadakis, V., "A Reaction Engineering Approach to the Problem of Concrete Carbonation", Journal of the American Institute of Chemical Engineers, 35(10), pp.1639~1650 (1989)
  19. Papadakis, V., "Fundamental Modeling and Experimental Investigation of Concrete Carbonation", ACI Materials Journal, 88(4), pp.363~373 (1991)
  20. Papadakis, V., "Physical and Chemical Characteristics Affecting the Durability of Concrete", ACI Materials Journal, 88(2), pp.186~196 (1991)
  21. Pham, S., "Effects of Carbonation on the Microporosity and Macro Properties of Portland Cement Mortar CEM I", Journal of Materials Science and Chemical Engineering, 2(7), pp.40~52 (2014)
  22. Phung, Q., "Effect of Limestone Fillers on Microstructure and Permeability Due to Carbonation of Cement Pastes Under Controlled co2 Pressure Conditions", Construction and Building Materials, 82, pp.376~390 (2015)
  23. Pizzol, V., "Effect of Accelerated Carbonation on the Microstructure and Physical Properties of Hybrid Fiber-Cement Composites", Minerals Engineering, 59, pp.101~106 (2014)
  24. Puatatsananon, W., "Nonlinear Coupling of Carbonation and Chloride Diffusion in Concrete", Journal of Materials in Civil Engineering, 17(3), pp.264~275 (2005), ASCE
  25. Rukzon, S., "Strength and Carbonation Model of Rice Husk Ash Cement Mortar with Different Fineness, Journal of Materials in civil Engineering", Journal of Materials in civil Engineering, 22(3), pp.253~259 (2010), ASCE
  26. Saetta, A., "Experimental Investigation and Numerical Modeling of Carbonation Process in Reinforced Concrete Structures Part I : Theoretical Formulation", Cement and Concrete Research, 34(4), pp.571~579 (2004)
  27. Saetta, A., "Analysis of Chloride Diffusion Into Partially Saturated Concrete", ACI Materials Journal, 90(5), pp.441~451 (1993)
  28. Thiery, M., "Impact of Carbonation on the Microstructure and Transfer Properties of Cementbased Materials", Transfert (2012), Ecole Centrale de Lille
  29. Tolentino, E., "Effects of High Temperature on the Residual Performance of Portland Cement Concretes", Materials Research, 5(3), pp.301~307 (2002)
  30. Tumidajski, P., "Effect of Sulfate and Carbon Dioxide on Chloride Diffusivity", Cement and Concrete Research, 26(4), pp.551~556 (1996)
  31. Villain, G., "Impact of Carbonation on the Microstructure and Transport Properties of Concrete", 10DBMC International Conference On Durability of Building Materials and Components, pp.17~20 (2005), LYON
  32. Deterioration of Concrete Due to Combined Reaction of Carbonation and Chloride Penetration: Experimental Study, "Yoon, I.", Key Engineering Materials, 348~349 (2007)
  33. In-Seok Yoon, "Simple approach to calculate chloride diffusivity of concrete considering carbonation", Computers and Concrete, An International Journal, 6(1), pp.1~18 (2009), 국제구조공학회
  34. Younsi, A., "Performance-Based Design and Carbonation of Concrete with High Fly Ash Content", Cement and Concrete Composites, 33(10), pp.993~1000 (2011)
  35. Yuan, C., "Effect of Carbonation on Chloride Diffusion in Fly Ash Concrete", Computers and Concrete, 5(4), pp.312~316 (2012)
  36. Yuan, C., "Influence of Carbonation on the Microstructure of Concrete", Bulletin of the Chinese Ceramic Society, 32(4), pp.687~691 (2013)
  37. Zhu, X. J., "Combined Effect of Carbonation and Chloride Ingress in Concrete", Construction and Building Materials, 110, pp.369~380 (2016)

관련 논문AI추천

콘크리트내의 이중구조와 시간의존성을 고려한 염화물 해석기법의 개발권성준, 김영준, 김진영, 문진만, 오경석한국구조물진단유지관리공학회 · 한국구조물진단유지관리공학회 논문집2015 · 제19권 제5호수산화칼슘 용해도와 공극률 감소를 고려한 간략화 된 탄산화 모델이윤, 권성준, 박기태한국구조물진단유지관리공학회 · 한국구조물진단유지관리공학회 논문집2015 · 제19권 제1호균열 패턴에 따른 균열부 콘크리트의 염화물 확산계수 모델링권성준, 김선환, 배상운건설환경연구소 · 청운대학교 건설환경연구소 논문집2013 · 제8권 제2호균열 폭에 따른 콘크리트 구조물에서의 염화물 흡수 평가김건수, 김재환, 박기태한국구조물진단유지관리공학회 · 한국구조물진단유지관리공학회 논문집2020 · 제24권 제6호확산과 이송을 고려한 콘크리트의 염소이온 침투해석김기현, 정형목, 차수원한국전산구조공학회 · 한국전산구조공학회논문집2009 · 제22권 제6호철근콘크리트 구조물 염해 내구설계에 있어서 설계확률변수의 민감도 평가박동천, 오상균한국항해항만학회 · 한국항해항만학회지2009 · 제33권 제3호

이 간행물의 다른 논문 (14건)

TDFA를 혼입한 초기재령 콘크리트의 공학적 특성 평가김혁중, 박재성, 박상민, 권성준pp. 1-8국내 고속도로 교량의 차량 충돌 위험도 평가조준상, 민근형, 김우석, 길흥배pp. 9-17골조-전단벽 구조에서 상부 전단벽 미배치의 구조효과김형기pp. 18-25노출형 철골기둥-베이스 플레이트 접합부의 내력평가를 위한 수치적 연구구혜진, 유미나, 최기선, 유영찬, 이광호pp. 26-34화재시 고강도강 엔드플레이트 접합부의 회전 거동에 관한 연구이치형, 신수민, 윤성기pp. 35-43
원문 보기