| 粉煤灰混凝土耐热机理的探讨 |
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| 引用本文： | 邓初首.粉煤灰混凝土耐热机理的探讨[J].矿产综合利用,2008(2):27-30. |
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| 作者姓名： | 邓初首 |
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| 作者单位： | 安徽工业大学建筑工程学院,安徽,马鞍山,243002 |
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| 摘 要： | 探讨了粉煤灰对混凝土耐热性能的改善机理,分析认为:粉煤灰混凝土耐热机理主要表现在四个方面,即粉煤灰能结合游离CaO;减少C-S-H凝胶开裂且稳定C-S-H凝胶;减少水泥石收缩;增强水泥石与集料的界面粘结力。并阐述了火山灰活性、烧失量、细度和需水量比等品质指标对粉煤灰质量的影响。
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| 关 键 词： | 混凝土 耐热性 粉煤灰 耐热机理 |
| 文章编号： | 1000-6532(2008)02-0027-04 |
| 修稿时间： | 2007年9月13日 |
Discussion on the Heat-Resisting Mechanism of Fly Ash Concrete |
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| DENG Chu-shou.Discussion on the Heat-Resisting Mechanism of Fly Ash Concrete[J].Multipurpose Utilization of Mineral Resources,2008(2):27-30. |
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| Authors: | DENG Chu-shou |
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| Abstract: | The improvement mechanism of the fly ash for heat-resisting performance of concrete is discussed.Based on overall and detailed analyses,it can be considered that the heat-resisting mechanism of fly ash concrete is mainly displayed in following four aspects:the fly ash can combine dissociated CaO;can reduce dehiscence of C-S-H gelatin and stabilize C-S-H gelatin;can reduce contraction of the cement-stone;and can enhance interface cementing power between cement-stone and aggregate.The effects of the activity of volcanic ash,and the loss on ignition,fineness of the fly ash and the dosage of water on quality of fly ash are expatiated. |
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| Keywords: | Concrete Heat-resisting performance Fly ash Heat-resisting mechanism |
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