水泥悬浮液电导率及其与凝结时间的关系探索

通过大水灰比(W/C=500)方式测定了广西部分水泥的悬浮液电导率,同时还测定了水泥悬浮液电导率与Ca2+浓度的变化关系。研究表明,在大水灰比条件下,水泥悬浮液电导率与Ca2+浓度有着非常好的线性关系,水泥悬浮液电导率的变化主要取决于Ca2+的浓度变化。实验数据的分析表明,大水灰比水泥悬浮液电导率与终凝时间存在着明显的负相关趋势,电导率越大则终凝时间越短。样品经过分类后,在水化非常早期的水泥悬浮液电导率与终凝时间存在良好的线性关系,相关系数均在0.90以上。由于水泥悬浮液电导率的测定比净浆电导率的测定方便,该文介绍的方法不失为企业在日常工作中对产品凝结性能检测的辅助手段。

Cement Suspension Conductivity and Its Relation with Setting Time

Electrical conductivity of cement suspension with W/C=500 was tested,and the relation between suspension conductivity and Ca2＋ concentration was also tested in this investigation.The test results indicated that,there was a satisfactory linear relation between suspension conductivity and Ca2＋ concentration in suspension,which illustrated that the variation of conductivity in cement suspension was mainly depended upon the Ca2＋ concentration in suspension.Data analysis indicated that,there was a negative trend between cement suspension conductivity and cement final setting time,after sample classification the linear relation between suspension conductivity and final setting time was much obvious with relative coefficient greater than 0.90.Since suspension test is more convenient than that of paste conductivity,the method introduced in this paper may be a supplementary way to routine test on cement setting property for cement plants.