摘要
针对水工混凝土在冻融循环与不同硫酸盐浓度环境下的损伤问题,试验探究混凝土在硫酸盐作用下的质量损失变化、抗压强度变化、抗劈裂强度变化以及弹性模量变化.结果表明:①随着Na2 SO4 溶液浓度的提高,冻融循环下混凝土的质量损失率、抗压强度、抗劈裂强度及弹性模量显著下降;②冻融与硫酸盐共同作用下,混凝土的前期破坏主要受冻融影响,后期则为硫酸盐和冻融共同作用导致破坏加剧.
Abstract
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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NSTL
维普
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