• Proceedings of the Korean Society of Disaster Information Conference
• /
• 2017.11a
• /
• pp.127-128
• /
• 2017

최근에는 발생되고 있는 염화물계 제설제의 도로 손상, 차량 부식 및 미끄럼으로 인한 교통사고 문제를 해결하기 위해 친환경 제설제의 사용이 권장되고 있다. 그러나, 현재 수행되고 있는 친환경 제설제의 성능 시험 방법은 실내에서 얼음을 이용하여 실시되고 있으나, 실제 현장 성능과의 상관 관계가 낮은 것으로 나타났다. 따라서 본 논문에서는 현재 수행되고 있는 제설제 성능평가 방법을 소개하고 국내 실정에 부합하는 제설제의 성능 검증을 위한 현장 시험 방법을 제안하고자 한다.

• Journal of the Korean Society of Hazard Mitigation
• /
• v.8 no.6
• /
• pp.47-52
• /
• 2008

Deicer has been generally used for prevention of a road freezing in winter, and the usage amount is increasing every year. However, deicer may induce the decrease of bond strength, surface scaling, and environmental pollution. In this study, the field test was performed to investigate the deterioration of concrete road structures used for 17 years. And, the corrosion resistance characteristics were compared for the existing deicer and eco-friendly deicer. According to the field test results, the penetration depth of limit chloride amount was about 40mm, and the average concentration of chloride was $3.45kg/m^3$ at the surface of structures. On the contrary, the carbonation depth was slight. The penetration depth of eco-friendly deicer was less than the existing deicer, and the corrosion resistance of eco-friendly deicer was higher.

• 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.

• Journal of Korean Society of Environmental Engineers
• /
• v.32 no.5
• /
• pp.487-498
• /
• 2010

This article presents an effect of deicer such as $CaCl_2$(calcium chloride) and EFD(Eco-Friendly Deicer) composed by organic acids on the survival and growth of plant. Pine and bush clover which are main natural species on the road side, and young radish and kidney bean which are cultivation species used in this test that responses of survival and growth were analyzed as grade concentration of deicers. Bush clover showed the most sensitive survival response among 4 species to the deicer. Pine growth didn't have statistical significance as the kind of deicers and concentration variation, but growths of bush clover and kidney bean showed growth inhibition in concentration more than 3% of $CaCl_2$ and EFD1. The results of survival and growth for $CaCl_2$(calcium chloride) demonstrated that young radish and pine are tolerant species and bush clover and kidney bean are sensitive species. Although EFD1 manufactured by chemical showed the negative effect on the survival and growth of plants, EFD2 made with waste compost was confirmed that it has the positive influence to the survival and growth of the both sensitive and tolerant plant species for chloride.

• 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.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.21 no.6
• /
• pp.132-139
• /
• 2017

A huge amount of de-icing agent is sprayed during winter to promote traffic safety in cold regions, and the quantity of de-icing agent sprayed has increased each year. The main ingredients in commonly used de-icing agents are chlorides, such as calcium chloride($CaCl_2$) and sodium chloride(NaCl). While calcium chloride is mostly used in Korea and sodium chloride is usually used in the U.S. and Japan, all de-icing agents include chloride ions. The chlorides included in sprayed calcium chloride-based de-icing agents have severe adverse effects, including the corrosion of reinforcing steels through salt damage by infiltrating into road structures, reduced structural performance of pavement or damage to bridge structures, and surface scaling, in combination with freezing damage in winter, as well as water pollution. In addition, the deterioration of paved concrete road surface that occurs after the use of calcium chloride-based de-icing agent accelerates the development of visual problems with traffic structures. Therefore, the present study was performed to prepare an environment-friendly liquid de-icing agent through a reaction between waste organic acids and calcium-based by-products, which are industrial by-products, and to analyze the properties of the de-icing agent in order to evaluate its applicability to road facilities.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2017.10a
• /
• pp.167-167
• /
• 2017

• Journal of Institute of Convergence Technology
• /
• v.6 no.2
• /
• pp.25-28
• /
• 2016

Recently, due to the climate change by global warming, the amount of snow has increased. The situations were demanded to use many snow removal materials. The snow removal materials that used in Korea were solid chloride deicing material. That is calcium chloride($CaCl_2$) and sodium chloride(NaCl). Solid chloride baesd snow removal materials have various property, for example good freezing point depression, deliquescence and economical solvents. However, there are problems such as water pollution, high corrosiveness and ecocide. For such reason, development of eco-friendly deicer was required obligatorily. This study investigated development situation of eco-friendly deicer materials.

• International Journal of Highway Engineering
• /
• v.12 no.3
• /
• pp.103-111
• /
• 2010

Recently, usage bicycle has been encouraged to reduce energy consumption and $CO_2$. For this purpose, lots of bike road construction are planned. Typical type of pavement used in bikeroad such as asphalt concrete pavement, portland cement concrete pavement, colored pavement, soil pavement. However, these pavement types may need high construction cost comparing the required capacity of bike road. In this study, roller compacted concrete pavement which are economical and durable, are investigated to use as bike road pavement. The optimum compaction level and mix design of roller compacted concrete pavement are suggested by exploring strength test with various mixture ratio and compaction level, Also durability was examined based on freeze-thaw and scaling test. In addition, the cost and amount of carbon emission during in the construction of roller compacted concrete were evaluated and compare with the cost and carbon emission of typical portland cement concrete.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.11
• /
• pp.7917-7924
• /
• 2015

In this study, based on CMA which is increasingly used for eco-friendly deicing materials, dehumidification MB made of sodium carbonate, $MgCl_2$/MgO (M/M), and SAP is to be produced. And its moisture absorption rate and dehumidification performance of the film are to be analyzed. And the data on the materials used for the dehumidification film are to be acquired. In case of the dehumidification MB, in which CMA and SAP are mixed, had poor film machinability due to foaming and moisture issues, but adding bentonite and calcium carbonate solved the problem. When a foaming agent was added to extend surface area between substances, CMA and M/M showed no remarkable difference, but SC showed large increase to 3.15 g/g. As the result of anti-corrosive test, CMA dehumidification film showed no corrosion while SC showed pitting corrosion and M/M showed corrosion.