Study On Proactive Deicing And Skid-resisting Technology Of Asphalt Pavement With Dark Ice Layer

Road with dark ice layer is a common phenomenon in winter in the south of China,which greatly reduces the skid resistance of road.It can not only reduce the traffic capacity of the road,but also bring potential harm to the traffic safety.At present,the traditional treatment modes dealing with road with dark ice layer,such as clearing icewith manual and mechanical equipment,spreading ice-melting agent is still the main way to deal with the road with dark ice layer,which is not only a waste of human and material resources,but also pollutes the environment.Research on proactive deicing technology is necessary.Taking rubber elastic pavement as the research object,study in-depth the embedded rubber cylinder icebreaking technology and rubber particle asphalt mixture icebreaking technology.First analyzing the icebreaking mechanism of the two kinds of technology,and then analyze the factors affecting the icebreaking effect by using the finiteelement software and discrete element software,finally using indoor simulation experiment to verify the effect of icebreaking.The main conclusions are as follows:(1)Embedded rubber cylinder icebreaking technique has a good deicing effect,the icebreaking effect is influenced by many factors,such as rubber cylinder diameter,modulus,distance and ice layer thickness,the vehicle load have all an impact on the icebreaking effect.(2)Rubber cylinder diameter and modulus has a great influence on pavement icebreaking effect,the larger rubber column diameter and the smaller modulus,the ice crushing effect is more obvious,but when the modulus are very low,the pavement strain near cylinder may be too large to bring the pavement bending failure.(3)The vehicle load and the thickness of the ice also have an impact on the rubber column breaking effect,the larger vehicle load,the ice breaking effect is stronger;when the ice layer thickness increases in a certain range,the rubber cylinder ice breaking effect will increase.(4)The technology of rubber particle asphalt mixture also has a good effect of ice breaking,the amount of rubber particles,the temperature and the ice layer thickness can affect the ice breaking effect.Content of rubber particles influences much deicing effect,in the proposed range(2% ~ 6%),the more dosage,the larger deicing effect;with the decrease of the temperature,the rubber particles mixture deicing effect gradually decreased.The effect of dark ice layer thickness on the deicing effect of rubber particle asphalt mixture is significant.When the dark ice layer thickness is more than 4mm,the deicing effect is obviously decreased.