| Ⅰ级粉煤灰对水泥净浆开裂的影响 |
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| 引用本文： | 胡红梅,杨帆,余彬彬,曾韶奎,刘冬冬.Ⅰ级粉煤灰对水泥净浆开裂的影响[J].粉煤灰,2012(2):4-6. |
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| 作者姓名： | 胡红梅 杨帆 余彬彬 曾韶奎 刘冬冬 |
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| 作者单位： | 厦门大学建筑与土木工程学院,福建厦门361005 |
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| 摘 要： | 采用环约束法,试验研究了Ⅰ级粉煤灰对不同水胶比下水泥净浆开裂的影响。试验研究发现：Ⅰ级粉煤灰在低水胶比（0.24）情况下对净浆开裂几乎没有影响,当水胶比为0.32和0.40时抗裂作用明显;较高水胶比（0.32、0.40）情况下,Ⅰ级粉煤灰对净浆的抗裂性能有较好的改善作用,在20%～65%掺量范围内,随着掺量的增大,净浆的开裂龄期延长,抗裂性能提高。
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| 关 键 词： | Ⅰ级粉煤灰 水胶比 水泥净浆开裂 环约束法 |
Influence of Class I Fly Ash on Cracking of Cement Paste |
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| Abstract: | By using the ring constraint test, the influence of class I fly ash on the cracking of cement paste was studied at different water binder ratio. The results of test show： when water.binder ratio is 0,24, class I fly ash has no effect on the cracking of cement paste; In the range of water-binder ratio 0.32 to 0.40, class I fly ash has a significant effect on anti-cracking of cement paste; within 20% to 65% dosage range, with increase of the dosage, the anti.cracking performance of certient paste is improved. |
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| Keywords: | class I fly ash water binder ratio cracking of cement paste ring constraint test |
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