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采用快速试验方法研究了波特兰水泥粉煤灰混合胶凝材料的抗硫酸盐性能,探讨了水灰比和养护温度对水泥胶砂试件抗硫酸盐性能的影响.研究结果表明,较高的水灰比或养护温度会有助于硫酸盐侵蚀的发生和发展,进而引起试件的膨胀和破坏.高水灰比的胶砂具有较大的比渗透率和有效扩散系数.
The sulfate resistance of Portland cementfly ash mixed cementitious materials was studied by rapid test method. The effect of watercement ratio and curing temperature on the sulfate resistance of cement mortar sands was discussed. The results of the study indicate that a higher water-cement ratio or curing temperature can contribute to the occurrence and development of sulphate erosion, which in turn causes the expansion and destruction of the specimen. The high water-cement ratio of the glue sand has a larger specific permeability and effective diffusion coefficient.