粉煤灰添加剂对矿渣水泥混凝土性能的影响

贾西 克·, 施特 ·乔, 亚当 ·斯
波兰土木工程和大地测量学院

摘要

本文介绍了粉煤灰的添加对矿渣水泥混凝土的特定物理和机械参数的影响。本文进行了实验测试，以测量
氯离子在混凝土中的迁移、混凝土在压力下暴露于水的密封性以及混凝土的抗压强度。另外，本研究测试了用CEM
IIIA 42.5和32.5水泥制成的六个系列的混凝土混合物。通过添加粉煤灰作为部分水泥替代品，对基础混凝土混合料
进行了修改，添加量为25%和33%。对所得结果的比较分析表明，在紧固性方面有明显的改善，特别是在以CEM
IIIA 32.5水泥为基础的混凝土中，以及含有粉煤灰添加剂的混凝土对氯离子渗透的抵抗。在含有粉煤灰添加剂的混
凝土中，显示出较慢的初始强度增长速度和较长的成熟期强度。根据研究结果，作者建议改变欧洲标准化体系，允
许在用CEM IIIA 42.5或32.5水泥等级制造的混凝土中使用粉煤灰添加剂。

关键词

混凝土；粉煤灰；矿渣水泥；氯离子迁移

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