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为了研究掺粉煤灰水泥基材料的交流阻抗弥散效应,测试并解析了粉煤灰掺量分别为0%、10%、20%及30%,水胶比为0.4的水泥基材料试件在14 d、28 d、56 d、70 d及91d龄期时的交流阻抗谱.结果表明:基体CPE1值随水化时间呈指数式降低,CPE1的弥散指数n1随着水化时间呈对数式增大.掺0%和10%粉煤灰试件不连通孔的CPE2值远大于掺20%和30%粉煤灰试件CPE2值.无论粉煤灰掺量多少,CPE2值均随水化时间先增大,后减小.对于不同粉煤灰掺量的CPE2弥散指数n2值随水化时间呈幂函数降低.粉煤灰的掺入较大地改变了水泥基材料的弥散效应,因此,考虑弥散效应解析掺粉煤灰水泥基材料交流阻抗谱是十分必要的.

参考文献

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