Abstract: In order to improve the anti-early plastic cracking properties of concrete bridge deck pavement. Influence of internal curing materials on the anti-early plastic cracking properties of concrete was investigated with slab restraint method and on-site entity engineering of bridge deck pavement. The results indicate that internal curing materials effectively delay the early cracking of concrete, and theanti-early plastic cracking properties of concrete are improved with the increase of the content of internal curing materials. When the content of internal curing materials is 0.2% (mass fraction), the unit cracking area of concrete decreases from 1 219 mm²/m² to 47 mm²/m² through the slab restraint method. Compared with ordinary concrete, the number of cracks, maximum length, maximum width, and cracked area per unit area decrease by 91.7%, 55.8%, 37.5%, 90.7% with 0.2% internal curing materials, the internal curing materials significantly improve theanti-early plastic cracking properties of concrete bridge deck pavement.

Key words: concrete bridge deck pavement, early shrinkage, plastic cracking, internal curing material