[논문]제설제에 노출된 서울시내 도로 시설물의 열화 환경 분석

윤인석

doi:10.11112/jksmi.2022.26.1.1

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

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.26 no.1, 2022년, pp.1 - 9

윤인석 (인덕대학교)

초록
AI-Helper

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.

Abstract ▼ AI-Helper

De -icing salts have been used commonly in areas where snow or ice is a seasonal safety hazard for roadway, however, the salts is one of main causes on serious deterioration of road infrastructures in crowded urban city like Seoul. In order to establish maintenance strategy of road infrastructures under de-icing salts laden environment, it is necessary to examine environmental characteristics and its response to the existing facilities. The purpose of this study is to evaluate the deterioration environment of road infrastructures. Additional purpose is to develop a design model and details for durability design of infrastructures under de-icing salts laden environment, considering mainly a build-up rate of surface chlorides. Concentration of external chloride solution and surface chloride content were calculated at the level of average de-icing salts for 5 years, ratio of auxiliary road of 17.5 to 30%, and effective exposure area to snow 50 to 80%. The chloride build-up rate was 0.073 ~ 0.077% / year and the maximum surface chloride content was calculated to be 2.2 ~ 2.31% by concrete wt. This study is expected to be used for establishing integrated strategy of road infrastructures, such as predicting chloride profiles or degree of chemical corrosion to exposure concrete.

Keyword

표/그림 (14)

그림 Fig. 1 Various types of deterioration of road infrastructures due to de-icing salts
그림 Fig. 2 CaCl₂-Ca(OH)₂-H₂O phase diagram for different Ca(OH₂) / CaCl₂ molar ratios (Rm) developed from Farnametal.(2015b)
표 Table 1 Experimental program for simulating deterioration of concrete due to de-icing chemicals
그림 Fig. 3 Amount of snow cover vs. amount of de-icing salts sprayed to roads in Seoul for 5 years
그림 Fig. 4 Concentration of external chloride solution melted from de-icing salt on the road with exposure area A_ex and ratio of arterial road A_tr for last 5years
그림 Fig. 5 Maximum chloride content of concrete with external chloride concentration
표 Table 2 Level of corrosion environment by means of surface chloride content
그림 Fig. 7 Chloride build-up rate to form maximum chloride content in concrete with w/c ratio
그림 Fig. 6 Chloride levels, by region of North America (Life 365 2018)
표 Table 3 Surface chloride content (C_s)of concrete with time
그림 Fig. 8 Comparison between calculation and experiment
그림 Fig. 9 Comparison of maximum chloride content of this study with other literatures
그림 Fig. 10 Average value of surface chloride content of concrete road in Seoul
표 Table 4 Mix proportion of concrete samples

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