Technique Research On Diseases Restoration For Epoxy Asphalt Concrete Paved On Steel Deck Bridge

As a kind of steel deck surfacing material, epoxy asphalt has been studied and used in Europe and America from the 1960s, while still a blank in China. In China, there are just 2nd Nanjing Bridge; Tao Yaomen Bridge in Zhe Jiang province and some other bridges which using epoxy asphalt concrete as the surfacing of the steel decks. The Southeast University Deck Paving Group have accomplished a large quantity of experiments and determined that epoxy asphalt served as steel deck surfacing material has great advantages such as high strength property, anti-rutting and water stability property, low temperature and deformation property, oil corrosion resistance. Thus introduce epoxy asphalt act as long span deck paving material.At the same time, we found that because of the difficulty in production and construction of epoxy asphalt and stringent requirements of time and temperature control, there must be some inevitable diseases caused by certain factors for using epoxy asphalt as long span deck paving material. This thesis based on the maintenance of the steel deck surfacing of the Southern Branch Bridge (SBB) of the Nanjing Second Yangtze River Bridge, analyzing the possible diseases about the epoxy asphalt deck pavement according to the data of construction, and researches each policy for each disease, then brings forward maintenance policies suitable for epoxy asphalt deck pavement.This thesis analyzes the problems we met during the course of maintenances for 2nd Nanjing Bridge firstly. Then put forward the possible diseases during the usage of the epoxy asphalt deck pavement. Then according to some parallel tests and bring forward some suitable materials aim at different diseases, and carry through the local treatments based on the diseases occurred on the deck surfacing of 2nd Nanjing Bridge. And set a foundation for the maintenance of epoxy asphalt deck surfacing.This thesis ordinary describes the mechanism of the restoration for the cracks occurred on the deck surfacing. Let the readers have cognizance of the importance of"fortified design"for the cracks restoration. Aimed at blister diseases occurred in different phases, the thesis analyzed the performance of the maintain materials through multi-points of view, and had an ordinary discuss for the local construction, insure the feasibility of putting the maintain materials into practice.