研究了水灰比为0.50～0.65的水泥砂浆分别经烘干、纯水饱和及5％NaCl溶液饱和后在-21～12℃之间的电导率.结果表明,经60℃烘干的水泥砂浆的电导率随原始砂浆水灰比的增大而降低,电导率的对数与绝对温度的倒数呈线性关系,成型水灰比不同的烘干水泥砂浆的离子迁移表观活化能差别较小;纯水饱和砂浆电导率的对数随绝对温度的倒数变化曲线在1/T=3.72×10-3 K-1(即约-4℃)附近存在一个明显的转折点,用5％ NaCl溶液饱和的水泥砂浆的电导率显著高于纯水饱和砂浆,且电导率的对数随绝对温度的倒数变化曲线上的转折点降低到-7℃左右.
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