轻烧氧化镁膨胀剂对水泥浆体干缩性能的影响

Drying shrinkage of cement paste containing light calcined magnesia expansive agent

研究了轻烧氧化镁膨胀剂和粉煤灰用于水泥浆体的干缩变形;探讨了轻烧氧化镁膨胀剂和粉煤灰复合作用下对水泥浆体的抗干缩能力。结果表明:轻烧氧化镁和粉煤灰单掺时均能减小浆体的干燥收缩,二者复合双掺后对水泥浆体的干燥收缩减小的幅度更大,表现出更好的抗干缩能力。

The drying shrinkage of cement paste containing light calined magnesia expansive agent and fly ash were researched.The effect of composite of light calined magnesia expansive agent and fly ash on drying shrinkage of cement paste was discussed.The results show that both light calined magnesia expansive agent and fly ash reduce the drying shrinkage of cement paste.The drying shrinkage of cement paste mixed with light calined magnesia expansive agent and fly ash all got improvements as compared with that mixed singly with light calined magnesia expansive agent or fly ash, especially at the later ages.