제설제에 노출된 서울시내 도로 시설물의 열화 환경 분석 = Evaluation on De-Icing Salts Laden Environment of Road in Seoul

국문 초록 (Abstract)

제설제는 동절기 도로 위의 눈을 녹이기 위하여 사용되고 있으나, 서울과 같은 대도시에서 교통이 밀집한 도로 시설물의 열화를 촉진시키는 주요 요인 중의 하나이다. 도로 시설물의 합리적인 유지관리 전략을 수립하기 위하여 제설제에 노출된 도로 시설물의 환경분석이 필요하다. 본 연구는 서울시의 적설량 및 사용된 제설제량을 토대로 외래 염소농도를 계산하였다. 평균 표면 염소이온량을 구하고자 서울시의 5년간 기후환경 및 제설제 사용량을 이용하였으며, 주간선 및 보조간선율 17.5 ~ 30%, 제설제 노출 유효면적율 50 ~ 80% 수준에서 검토하였는데, 농축 속도는 0.073~ 0.077%/년, 최대 표면 염소이온량은 콘크리트 중량대비 2.2 ~ 2.31% 수준이었다. 본 연구결과는 염소이온 프로파일의 예측 또는 콘크리트 구체의 화학적 부식정도 등으로 종합적인 유지관리 대책을 수립하는데 활용될 수 있을 것으로 기대된다.

참고문헌 (Reference)

1 윤인석 ; 남진원, "콘크리트내 염소이온량이 전기저항에 미치는 영향" 한국구조물진단유지관리공학회 18 (18): 90-96, 2014

2 이창수 ; 윤인석 ; 박종혁, "제빙화학제 살포로 인한 콘크리트 교량 바닥판의 철근부식 시작시기의 예측" 한국콘크리트학회 15 (15): 606-614, 2003

3 Weyers, R. E., "bConcrete Bridge Protection and Rehabilitation: Chemical and Physical Techniques, Service Life Estimates" Strategic Highway Research Program 5-164, 1994

4 Bu, Y, Luo, D., "Using Fick’s Second Law and Nernst Plank Approach in Predicting of Chloride Ingress in Concrete Materials" 3 (3): 2014

5 Villani, C, "The Influence of Pore Solutions Properties on Drying in Cementitious Materials" 97 (97): 386-393, 2014

6 Villani, C, "The Influence of De-icing Salt Exposure on the Gas Transport in Cementitious Materials" 67 (67): 107-114, 2014

7 Farnam, Y., "The Influence of Calcium Chloride Deicing Salt on Phase Changes and Damage Development in Cementitious Materials" 64 : 1-15, 2015

8 "Svensk Standard SS 13 72 44 (2005), Concrete Testing – Hardened Concrete – Scaling at Freezing"

9 Vu, K. A. T., "Structural Reliability of Concrete Bridges including Improved Chloride-induced Corrosion Models" 22 (22): 313-333, 2000

10 Henriksen, C., "Specifications for New Bridges, Bridge Management, 3" E & FN SPON 125-137, 1996

11 Van Breugel, K., "Simulation of Hydration and Formation of Structures in Hardening Cement-Based Materials" TU Delft 1991

12 Weyers, R. E., "Service Life Estimates, SHRP-S-XXX, SHRP" National Research Council 1992

13 "Seoul metropolitan government"

14 etzer, M. J, "RILEM TC 117-FDC (1996), CDF Test – Test Method for the Freeze-Thaw Resistance of Concrete- Tests with Sodlium Chloride Solution (CDF)"

15 Seoul Safety General Office, "Promotion Results of Snow Remova for 2019/2020, Department of Road Maintenance"

16 Bazant, Z. P., "Physical Model for Steel Corrosion in Concrete Sea Structure – Application, Journal of Structure, Div" 105 (105): 1137-1153, 1979

17 Troive, S., "Optimum of LCC of Concrete Bridges" Royal Institute of Technology

18 Peterson, K., "Observations of Chloride Ingress and Calcium Oxychloride Formation in Laboratory Concrete and Mortat at 5 oC" 45 (45): 79-90, 2013

19 Valenza Il, J. K., "Mechanism for Salt Scaling" 84 (84): 1161-1179, 2006

20 "MTO Test Method LS-412, Method of Test for Scaling Reistance of Cocnrete Surfaces Exposed to Deicing Chemicals"

21 "Life-365 Consortium III, Life-365 Service Life Prediction Model and Computer Program for Predicting the Service Life and Life-Cycle Cost of Reinforced Concrete Exposed to Chlorides, Version 2.2.3, 70"

22 Taylor, P., "Investigation of Deterioration of Joints in Concrete Pavements" 2012

23 Greenspan, L., "Humidity Fixed Points of Binary Saturated Aqueous Solutions" 81 : 89-96, 1997

24 Berke, N, "Handbook of Environmental Degradation of Materials" Elsevier Inc 2013

25 Uji, K., "Formulation of an Equation for Surface Chloride Content of Concrete Due to Permeation of Chloride, Corrosion of Reinforcement in Concrete" Elsevier Applied Science 258-267, 1990

26 Jain, J., "Effects of Deicing Salt Solutions on Physical Properties of Pavement Concretes" 69-75, 2012

27 Arora, P., "Corrosion Initiation Time of Steel Reinforcement in a Chloride Environment – A One Dimensional Solution" 39 (39): 739-759, 1997

28 Berke, N. S., "Corrosion Forms and Control for Infrastructures" American Society for Testing and Materials 207-231, 1992

29 JSCE, "Concrete Standard Specification, Part of Durability (in Japanese language)"

30 Kassir, M. K., "Chloride-induced Corrosion of Reinforced Concrete Bridge Decks" 32 : 139-143, 2002

31 Suraneni, S., "Calcium Oxychloride Formation in Paste Containing Supplementary Cementitious materials : Thoughts on the Role of Cement and Supplementary Cementitious Materials Reactivity" 1 : 24-30, 2016

32 Weast, R. C., "CRC Handbook of Chemistry and Physics" CRC Press 1982

33 "CEB Belletin d’Information No.243 (1998), Strategies for Testing and Assessment of Concrete Structures"

34 Takeda, N., "An Experimental Study on Penetration of Chloride Ions into Concrete and Corrosion of Reinforcing Bars in Various Marine Environments" 40 (40): 1998

35 Farnam, Y., "Acoustic Emission and Low temperature Calorimetry Study of Freeze and Thaw Behavior in Cementitious Materials Exposed to Sodium Chloride Salts" 2441 : 81-90, 2015

36 "ASTM C 672 / 672 M (2012), Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals"

37 Nilsson, L. -O, "A System of Estimation of Chloride Ingress into Background, Frederiksen" Danish Road Directorate 1997

38 Wee, T. H., "A Prediction Method of Long-Term Chloride Concentration Profiles in Hardened Cement Matrix Materials, ACI Materials Journal, 94(6)" 56 : 5-576, 1998