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| 摘要: |
| 在大掺量高钙粉煤灰水泥浆体中掺入不同类型的纤维，探求纤维在水泥基体发生膨胀时的作用效果及规律。实验结果表明，不同纤维对水泥膨胀的抑制效果差别很大。高弹模量的碳纤维、抗碱玻璃纤维能较好地抑制浆体中高钙粉煤灰的膨胀，而掺入低弹模量尼龙纤维的水泥浆本膨胀却增加。另外，通过水煮安定性试验还发现细径纤维能有效抑制由于高钙粉煤灰浆体体积不安定而造成的开裂破坏。 |
| 关键词: 纤维 高钙粉煤灰水泥 膨胀 安定性 |
| DOI： |
| 分类号:TQ172.715 |
| 基金项目: |
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| Restraint of Expansion of Fly Ash with High f CaO by Fiber Reinforcement |
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Hu Yu
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| Abstract: |
| The effect of several types of fibers on the expansion of cement paste, in which a large amount of fly ash with high content of f CaO (HFA) was added, was investigated. A new idea to prevent cement paste with HFA from destruction was proposed. The experimental results indicate that different types of fibers show significantly different effects on the restraint of expansion. Carbon fiber and alkali resistant glass fiber which has high elastic modulus could effectively restrain the expansion. To our surprise, the expansion of cement paste with Nylon fibers of low elastic modules is greater than that of control group. Moreover, it was also discovered that thin fibers could prevent the pastes from cracking caused by instability of HFA effectively through testing their water boiled soundness of the mixed paste. |
| Key words: fiber,fly ash with high f CaO,cement,expansion,soundness |
