Experimental study of a new modified waterproof asphalt concrete and its performance on bridge deck

The employment of asphalt concrete on the bridge surface paving has been widely used in long-span bridges owing to its merits such as light weight, seamless, good performance and simple maintenance. Currently, three types of asphalt materials – namely Guss asphalt , stone mastic asphalt and epoxy asphalt concrete – are principally applied in bridge deck pavement. However, these asphalt pavements have their own disadvantages. In order to further enhance the overall performance of asphalt concrete and its engineering applicability on bridge surface, in this research a new modified waterproof asphalt concrete is produced. The new modified asphalt from two aspects of the asphalt binder material and mixture were developed. To evaluate the performance of the new asphalt material and verify the feasibility of its application, a series of tests on bitumen and asphalt mixture were conducted. In addition, a comparative evaluation between the newly developed asphalt mixture and traditional ones was conducted. All in all, the results of this research could make a great contribution to the application of asphalt concrete technology on bridge surface paving.