硫酸盐侵蚀冻融循环条件下混凝土性能研究

Study on the Concrete Properties Under Sulfate Corrosion and Freeze-Thaw Cycles

受冻融破坏及盐离子侵蚀的影响,混凝土结构的力学性能降低,出于维持结构稳定性的目的,论文应用理论分析和室内循环加速试验的方法,探讨混凝土在硫酸盐侵蚀-冻融循环时的具体性能表现及变化特性。重点分析因素包含水胶比、引气剂量及粉煤灰掺量,结果显示,前两项因素对混凝土的性能有显著的影响,提升混凝土的整体性能,引气剂、粉煤灰等材料在促进混凝土性能提升方面有良好作用。

Under the influence of freeze-thaw damage and salt ion corrosion,the mechanical properties of concrete structures are reduced.For the purpose of maintaining structural stability,this paper discusses the concrete performance and change characteristics during sulfate corrosion freeze-thaw cycle by using theoretical analysis and indoor cyclic accelerated test methods.The key analysis factors include water binder ratio,air entraining dosage and flyash dosage.The results show that the first two factors have a significant impact on the performance of concrete,improving the overall performance ofconcrete.Air entraining agent,flyash and other materials have a good role in promoting the performance ofconcrete.