Abstract
ABSTRACT This study investigates the mechanical response and road performance of waterproof adhesive layers on concrete bridge decks through numerical simulations and laboratory tests. A finite element model examined mechanical responses under various parameters. Composite samples made of waterborne epoxy–polyurethane asphalt (WEPA) were prepared and tested, analyzing factors like spray volume, curing time, shear angle, and shear rate through pull-out and shear tests. Shear fatigue characteristics of WEPA were also evaluated. Results show that maximum shear stress in the waterproof layer is positively correlated with pavement modulus, overload coefficient, vehicle driving state, deck slope, and interlayer contact, but negatively correlated with vehicle speed. The most unfavorable condition corresponds to a shear angle of 30.6°. Tests indicate that the optimal WEPA spray volume is 1.1 kg/m2 with a curing time of approximately 24 hours. Shear strength increases with shear rate, optimal at 10 mm/min. Shear fatigue performance is significantly affected by temperature changes. These findings are important for enhancing the road performance of waterproof adhesive layers and extending the service life of concrete bridge deck pavements.
Published Version
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