| MgO对C2S矿物形成的影响 |
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| 引用本文： | 李好新,王培铭,熊少波. MgO对C2S矿物形成的影响[J]. 建筑材料学报, 2006, 9(2): 136-141 |
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| 作者姓名： | 李好新 王培铭 熊少波 |
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| 作者单位： | 同济大学,先进土木工程材料教育部重点实验室,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092 |
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| 基金项目： | 国家重点基础研究发展规划(973)资助项目(2001CB610704) |
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| 摘 要： | 通过化学分析和差热分析试验手段,分别测定了试样中f-CaO的含量(质量分数,下同)和试样在烧成过程中的热变化曲线,并以试样中f-CaO的含量作为反应进度的量度,研究了MgO对高C3S水泥熟料矿物———C2S的影响.化学分析和差热分析试验结果显示,MgO的加入降低了试样中f-CaO的含量,降低了CaCO3的分解峰温和C2S矿物形成的初始温度.热力学函数计算分析显示,MgO的加入增大了n(CaO)/n(SiO2)比值,从而增大了矿物形成的反应自由能数值.
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| 关 键 词： | 化学分析 差热分析 热力学 |
| 文章编号： | 1007-9629(2006)02-0136-06 |
| 修稿时间： | 2005-04-10 |
Influence of MgO on Formation of C2S |
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| LI Hao-xin,WANG Pei-ming,XIONG Shao-bo. Influence of MgO on Formation of C2S[J]. Journal of Building Materials, 2006, 9(2): 136-141 |
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| Authors: | LI Hao-xin WANG Pei-ming XIONG Shao-bo |
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| Abstract: | By testing the content of free-CaO in the sample,the content of free-CaO in the sample was regarded as the measurement of reacting.The influence of MgO on the formation of mineral of C_2S which is the component of highC_3S cement was studied by the research methods of chemical analysis and thermal analysis.It is found that appropriate adding of MgO helps absorption of free-CaO,and benefited the formation of mineral of C_2S;furthermore,lowers decomposition temperature of CaCO_3.At last,regarding the thermodynamic reason of this phenomenon,it is found that adding MgO increases the ratio of n(CaO)/n(SiO_2),enhances the thermodynamic function of C_2S mineral formation. |
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| Keywords: | chemical analysis differential thermal analysis thermodynamics |
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