影响水泥-粉煤灰抗硫酸盐性能的若干因素

Some Factors of the Influence on the Sulfate Resistance of Cementfly ash Blends

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 cement and cementfly ash blends has been studied by the method of quick test. The effects of mw/mc and curing temperature on the sulfate resistance of mortar have been discussed in this paper. The results show that the higher mw/mc and/or curing temperature can facilitate the creation and development of sulfate attack on mortar, which leads to expansion or fracture of mortar specimens. The specimens with higher mw/mc have larger specific permeability and effective diffusion coefficient.