Abstract
Accelerated frost-salt tests of fly ash concrete were carried out, through which the influence of water-binder ratio, volume of fly ash, air-entraining content on the frost-salt resistance of concrete were discussed, and the variation of surface characteristics, weight loss rate, relative dynamic modulus of concrete elasticity with the number of freeze-thaw cycles were investigated. The weight loss of specimens is above 5 percent; Water-binder ratio has decisive influence on the frost-salt resistance of concrete; concrete with suitable volume of fly ash can also increase the standard of frost-salt resistance; there is a critical air-entraining content which can improve the frost-salt resistance by the greatest extent. The relationship between dynamic modulus of elasticity and compressive strength are established. And also, calculation formula for the cycle number of frost-salt resistance is proposed.
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