• Title/Summary/Keyword: 융빙실험

Search Result 4, Processing Time 0.015 seconds

Evaluation of Deicing Performance for the Eco-Friendly Deicer (친환경 제설제의 융빙성능 평가)

  • Lee, Kyung-Bae;Lee, Seung-Woo;Yoo, Hyung-Mok;Park, Hee-Mun
    • International Journal of Highway Engineering
    • /
    • v.10 no.2
    • /
    • pp.15-26
    • /
    • 2008
  • Recently, various damages such as corrosion of rebar, scaling on concrete pavement and environmental deteriorations caused by using the chloride-containing deicer have been reported. To solve these problems, several substitute deicers have been developed by other researchers. However, studies on evaluation of performance for the developed deicers have been limited in the basic laboratory testing. It is necessary to establish the resonable and systematic test procedure for evaluating the deicing performance. In this study, rational and practical test methods were set up through literature review and deicing performance of Eco-Friendly Deicer(EFD), which is a kind of low chloride-containing deicer developed by our research group, was evaluated by the presented test methods. As results of the laboratory tests, initial deicing performance of EFD was similar with that of Pre-Wetted Salt(PWS) which has been used in highway deicing and it was verified by executed field tests in twice that EFD had passable deicing performance compare with PWS.

  • PDF

Evaluation of Self-deicing Function of Snow-melting Asphalt (자체 용설 아스팔트 혼합물의 용빙특성 분석)

  • Kim, Kwang-Woo;Lee, Gi-Ho;Hong, Sang-Ki;Jin, Jo-Ill;Doh, Young-Soo
    • International Journal of Highway Engineering
    • /
    • v.5 no.2 s.16
    • /
    • pp.1-14
    • /
    • 2003
  • This study is a fundamental research for developing self-deicing function of snow-melting asphalt concrete for roadway pavement. The objective of this study is to develop technology of making self-snow-melting asphalt pavement and evaluate properties of the asphalt concrete containing deicers. Asphalt concrete with deicers and CRM was produced by dry process. The $\alpha$-deicer, CRM and F-deicer were used for sand asphalt mixtures of thin-layer pavement on the existing pavement. The $\alpha$-deicer, $\beta$-deicer, CRM A, CRM B and C were used for 13mm dense-graded mixtures on surface course. Penetration grade of 60-80 asphalt was used for asphalt mixtures. Marshall mix-design, indirect tensile strength, freezing and thawing test, analysis of extracted water were carried out to evaluate performance of self deicing function of asphalt mixtures. The study result showed that snow-melting asphalt mixtures had not only good mechanical characteristics and good snow-melting function, but also chemically safe in environmental point of view.

  • PDF

Deicing Performance of Environment-friendly Deicing Agents (친환경 제설제인 CMO의 성능평가 분석)

  • Lee, Seung-Woo;Woo, Chang-Wan;Kim, Jong-Oh;Park, Hee-Mun
    • International Journal of Highway Engineering
    • /
    • v.7 no.3 s.25
    • /
    • pp.53-62
    • /
    • 2005
  • Efficient snow-removing work is one of important processes of winter road management. Calcium chloride has been used as a typical deicing agent in Korea. It presents superial performance as snow deicing agents, however it has been known to give serious environmental problem and to deteriorate durability of concrete structure in road by corrosion. The environment-friendly road deicing agents made from the waste material which is liquid phase organic matter that is Ca Mg and reactant of organic acid (nitric acid and propionic acid) have been introduced by number of researchers. They indicated the calcium magnesium salt of organic acids have advantage over the calcium choride in terms of lower production unit cost by resources recycling and can solve environmental problem and durability deterioration of structures. In this study, the deicing performance of calcium magnesium salt of organic acids(CMO) is investigated based on the series of experiments including the test for heat of dissolution, freezing point, ice melting test and ice penetration test.

  • PDF

An Experimental Study on the Deterioration of Concrete Due to De-icing Salts (융빙제에 의한 콘크리트의 내구성능 저하에 관한 실험적 연구)

  • 고경택;류금성;이종석;김도겸;김성욱;이장화
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • 2001.05a
    • /
    • pp.973-978
    • /
    • 2001
  • In clod weather regions, a strong seasonal wind brings sea salts to the land. In addition to it, recently, the spreading amount of de-icing salts has increased numerously for the purpose of removing snow and ice. Thus the salts environment around concrete structures becomes so severe that various damages of concrete due to applied salts will be brought up. It is briskly carried out study on effects of do-icing salts on concrete in America, Japan, European countries. However, there are not test method for the deterioration of concrete subjected to both freezing-thawing and chloride attack in Korea. In this study, we conduct on test for the compound deterioration subjected to both freezing-thawing and chloride attack, in order to investigate effects of de-icing salts on the deterioration of concrete.

  • PDF