Research On Waterproof And Cohesive Layer Of Concrete Bridge Deck Asphalt Pavement In Cold Region

The forcement of bridge deck pavement system is very complicated. It not only bears the vertical stress from load, but also the forcement from shear stress. In Northern cold areas, it is a common problem that asphalt concrete pavement is always in early destruction. With the increase of traffic and complex climatic conditions, frothing, movement and pits will occur in the new deck pavement construction in short time. Then it will not only increase the maintenance costs of bridge, but also bring hidden dangers to the traffic safety, and then causes the operating losses.In this paper, the concrete bridge deck asphalt pavement diseases are investigated and analysed, with the BISAR procedure to make mechanics calculation analysis to the waterproof bonding layer of concrete bridge deck asphalt pavement. Then we can conclude that the forcement of bridge deck waterproof layer is significant in the whole bridge deck pavement construction. Considering the respective influcence of changing environmental temperature, freeze-thaw cycles and deicer (NaCl), with the characters of waterproof layer of bridge deck pavement, drawing indoor, shearment and impermeable tests are carried out. Select a better waterproof layer programme of bridge deck pavement through the orthogoal analysis.