Abstract:Aiming at concrete mixture proportion design for super-wide box girder of Jiujiang Yangtze River Expressway
Bridge,the effect of fly ash amount,water-binder ratio and sand- total aggregate ratio on physical and mechanical proper原
ties of the box girder C55 high performance concrete (HPC) has been investigated. The results show that the box girder C55
HPC mixture prepared from P·域42.5 cement and 25 % grade玉fly ash possess good workability,high early strength and
great growth of late strength as well as high resistance to chloride ion penetration, with 0.305 water-binder ratio and 39 %
sand-total aggregate ratio. Especially the low adiabatic temperature rise is good to improve the crack resistance of box girder
concrete.
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