Study on Damage of Hydraulic Concrete under Freeze-Thaw and Sulfate Action
To the damage of hydraulic concrete under freeze-thaw cycles and different sulfate concentrations,changes in mass loss,compressive strength,splitting strength and elastic modulus of concrete under sulfate action are studied through experiments.The results show that ①with the increase of Na2 SO4 concentration,the mass loss rate,compressive strength,splitting strength and elastic modulus of concrete under freeze-thaw cycles decreased significantly;②under freeze-thaw combined with sulfate,the early failure of concrete is mainly affected by freezing and thawing,in the later stage,the damage was aggravated by the combined action of sulfate and freeze-thaw.
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