The effects of the curing time,aggregate gradation,water/cement ratio,aggregate volume content and maximum aggregate diameter on the chloride diffusivity of early age concrete were studied by experiment.It was found that the chloride diffusivity of early age concrete decreased with the increase of the curing time,but increases by increasing the water/cement ratio.The chloride diffusivity of early age concrete decreases with the increase of the aggregate volume content and maximum aggregate diameter.It was also found that the aggregate gradation had a certain influence on the chloride diffusivity of early age concrete.
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