Application of High-Viscosity Modified Asphalt Mixture in Curved Bridge Pavement

Abstract

Curved bridge deck pavement materials are easy to be damaged due to their complex stress conditions. Hence, the application of a high-viscosity modified asphalt mixture in curved bridge deck pavement is studied in this paper. Firstly, the severity of pavement diseases on curved bridge decks was introduced and compared with the deck pavement diseases in straight sections. Then, compared with SBS-modified asphalt mixture SMA-13, the advantages of high-viscosity modified asphalt mixture HM-SMA-13 in resistance to deformation, water damage, shear deformation, and fatigue were analyzed. The results show that HM-SMA-13 has 1.6 times the high-temperature deformation resistance, 1.2 times the shear deformation resistance, 1.1 times the low-temperature performance, 1.05 times the water stability, and 7 times the fatigue resistance of the SMA-13 mixture. Finally, HM-SMA-13 was applied to the curved bridge deck pavement. After one year of operation, slight rutting and cracking appear on the bridge deck pavement, which indicated that HM-SMA-13 is a suitable material for curved bridge pavement.

Finite Element Simulation Analysis of Curvilinear Continuous Beam Bridge Jacking and Translation Construction

“…Due to the fact that many of these bridges were built in the previous century, they were limited by the technology available at that time. As a result, their design load standards and capacity are inadequate to meet current requirements [4][5][6][7]. Currently, in China, the majority of funds allocated for highway bridge construction are focused on major bridge projects.…”

Study on Crystallization Mechanism of Asphalt Mixture in Bridge Deck Pavement

“…With the increasing frequency of alkaline flooding, the diseases caused by flooding are being paid attention to by road workers [22]. Some researchers think that the flooding of the structural layer is only the precipitation of substances in the pavement layer, which has little correlation with the performance of the structural layer, and that the early damage was mainly caused by the connecting gaps [23,24]; therefore, some scholars believe that the phenomenon of alkaline flooding can be solved only by replacing the structural layer with a denser asphalt mixture [25][26][27]. The fact of the matter is, however, that the phenomenon of alkaline flooding has decreased, but it still exists [28][29][30][31].…”