| 纳米SiO2对硅酸盐水泥水化放热特性的影响 |
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| 引用本文： | 徐迅,卢忠远.纳米SiO2对硅酸盐水泥水化放热特性的影响[J].南京工业大学学报(自然科学版),2007,29(4):45-48. |
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| 作者姓名： | 徐迅 卢忠远 |
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| 作者单位： | 西南科技大学,材料科学与工程学院,四川,绵阳,621010;先进建筑材料四川省重点实验室,四川,绵阳,621010 |
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| 基金项目： | 四川省应用基础研究计划
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四川省重点学科材料学建设基金 |
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| 摘 要： | 以硅灰为对比,利用微量热仪研究了纳米SiO2对硅酸盐水泥24 h内水化历程、水化放热特性的影响.研究结果表明:掺入纳米SiO2的水泥试样24 h内水化历程也可划分为类似于纯硅酸盐水泥水化的5个阶段;纳米SiO2的掺入,促使诱导期、加速期和减速期的出现提前,缩短了诱导期持续的时间;提高了水化开始时的放热速率,使第二放热峰的出现提前,增大了水化放热量.
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| 关 键 词： | 纳米SiO2 硅灰 硅酸盐水泥 水化热 纳米 硅酸盐水泥水化 放热特性 影响 Portland cement hydration heat 放热量 放热峰 放热速率 时间 加速期 诱导期 划分 试样 掺入 结果 水化历程 研究 微量热仪 |
| 文章编号： | 1671-7627（2007）04-0045-04 |
| 修稿时间： | 2007-03-11 |
Effect of nano-SiO2 on heat of hydration of Portland cement |
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| XU Xun,LU Zhong-yuan.Effect of nano-SiO2 on heat of hydration of Portland cement[J].Journal of Nanjing University of Technology,2007,29(4):45-48. |
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| Authors: | XU Xun LU Zhong-yuan |
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| Affiliation: | 1. School of Material Science and Engineering,Southwest University of Science and Technology, Mianyang 621010, China; 2. Key Laboratory for Building Materials of Sichuan Province, Mianyang 621010, China |
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| Abstract: | The effect of nano-silica powder compared to silicafume on the hydration Process and heat of hydration of Portland cement during 24 hours were studied. The results show that the hydration process of the sample containing nano-siliea powder during 24 hours can be divided into five periods similar to pure Portland cement and the presence of nano-silica powder increases the rate of exothermic hydration in the early period, puts ahead emergence of the dormant, acceleration and deceleration period, shortens duration of the dormant period, puts ahead emergence of second peak, increases heat evolution during 24 hours. |
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| Keywords: | nano-siliea powder silica fume Portland cement heat of hydration |
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