Abstract
There are many diseases in the deck pavement of long‐span steel bridges under the action of vehicles, rainwater, and freezing. It is necessary to study a new type of pavement material with high waterproof property, light weight, and high bonding performance for steel deck pavement. Polyurethane cement composite (PUC) can be used for steel deck pavement. In order to find out the temperature effect on fatigue properties of PUC, the four‐point bending fatigue test was carried out at different temperatures. In this paper, the optimum mix ratio of PUC was selected by compressive and flexural tests, and then the bending fatigue test was conducted under strain control mode. Under temperature and external force coupling condition, a method for predicting fatigue life of PUC is proposed by the combination of theoretical deduction and experimental research. The results show that the proposed formula can effectively describe the fatigue life and fatigue limit of PUC. Finally, compared with three different asphalt mixtures for steel deck pavement, it is found that the fatigue performance of polyurethane cement is better than that of asphalt mixture.
Highlights
Bridge deck pavement is an important part of the bridge
polyurethane cement composite (PUC) is a new kind of material with excellent mechanical properties of high tensile strength, large ultimate deformation, high modulus of elasticity, and excellent bonding performance. us, PUC has great advantages in steel bridge deck pavement materials [10,11,12]
With the increase of P : C, the surfaces of group A and group B specimens were basically complete with no obvious peeling phenomenon. e proportion of polyurethane with larger ductility increased with the increase of P : C during the compression process, which made the specimens have greater ductility and toughness
Summary
Bridge deck pavement is an important part of the bridge. As an interface directly acting with the wheels, it bears various loads from traffic and environment and plays an important role [1, 2]. e performance of bridge deck pavement is directly related to the high-speed, safe, and comfortable operation of vehicles [3,4,5]. E performance of bridge deck pavement is directly related to the high-speed, safe, and comfortable operation of vehicles [3,4,5]. A large number of diseases such as slippage, cracking, rutting, and bulging appeared in the steel bridge pavement, which can directly affect the comfort and safety of driving. After the bridge deck pavement was damaged, the steel deck would be exposed to the natural environment. In terms of the diseases of asphalt mixture in steel bridge deck pavement, polyurethane cement composite (PUC) can eliminate the diseases in asphalt mixture. PUC has large tensile deformation capacity and good bonding with steel bridge deck. Us, PUC has great advantages in steel bridge deck pavement materials [10,11,12] PUC is a new kind of material with excellent mechanical properties of high tensile strength, large ultimate deformation, high modulus of elasticity, and excellent bonding performance. us, PUC has great advantages in steel bridge deck pavement materials [10,11,12]
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