Research Of Interface Characteristics Of Early-Strength ECC Steel Deck Pavement Structure Based On Stud Connection

The increasing traffic has raised claim to a higher quality of road pavement of our country, which treat materials of steel bridge deck pavement stricter. Besides general road performance, materials are also required to have the ability to deform coordinated with steel plate, be equipped with good connection behavior with steel bridge panel, which is also the important and difficult problem in the study of pavement materials. At this stage, steel bridge deck pavements are mainly composed of asphalt mixture, among which epoxy asphalt concrete has the best performance. However, epoxy asphalt is featured with high cost and complex construction which restricts its widely using. Research proves that only with technological and pavement structure innovation, the pavement material is likely to make qualitative progress in steel bridge deck pavement produces.This article adopts engineered cementitious composites (ECC) as a layer of the steel bridge deck pavement, using pin connections between materials. First, the performances of present commonly used steel bridge deck pavement structure as well as several pavement diseases are summarized. A new kind of material named ECC is designed to used on steel bridge deck pavement, and " early-strength ECC-steel bridge deck pavement based on stud connector" is put forward. Secondly, with the method of water penetration and variables control, the type of cement and fly ash in mixture is selected. At the same time, researches find that the smaller crack width is, the faster the permeability property of materials recovers. Again, via push-out tests of ordinary concrete, mortar, and two kinds of ECC materials with different ductility, it is found that failure mode and ductility of ECC has more influence on interface property between ECC and steel than compressive strength. Finally, with the help of shear test, stud connection is proved to show better temperature sensibility than epoxy adhesive. Based on finite element software ABAQUS, the simulation method of ordinary concrete- steel push test is verified.