Study On The Anti-shear Experimentation And Performance Of Asphalt Mixture

With the increasing of traffic volume, axle loads, over loading and traffic channelization, serious rutting occurred on the heavy-duty asphalt pavements after opening to the traffic, and the rutting of asphalt pavement is close related to the anti-shear characteristics of asphalt mixture. The standard can not judge the anti-shear performance of asphalt mixture ,so it’s important to find a kind of new experiment way.In addition to the load and environment factors, the materials and the pavement structures will affect the asphalt pavement to anti-shear. It is very necessary to the asphalt materials and structures design.In this paper, a kind of direct shear apparatus with the simple principle, operation and date collection is developed to study on anti-shear characteristics of asphalt mixture and pavement for asphalt material and structure design. And the method and main parameters of the direct shear experiment is studied .The anti-shear characteristics of asphalt mixture with different gradations, asphalt contents, temperatures are studied. Through comparing to the anti-shear characteristics of asphalt mixture with the rutting test results, and find out that the anti-shear index can reflect the anti-rutting characteristics of asphalt mixtures.In this paper, finite element method is employed to analyze the shearing stress of concrete bridge decks with and without waterproofing layer. I work out the max shear stress of concrete bridge decks with and without waterproofing layer at different tempreture and different slope degree. In addition ,I discuss the anti-shear standard of concrete bridge decks with and without waterproofing layer, study the anti-shear standard of concrete bridge decks.