不同铝铁比铁相固溶体对硅酸三钙水化的影响
作者:
作者单位:

济南大学 材料科学与工程学院,山东 济南 250022

作者简介:

李全亮(1998—),男,山东潍坊人,济南大学硕士生.E-mail: li08231013@163.com

通讯作者:

叶正茂(1975—),男,河南商丘人,济南大学教授,博士生导师,博士. E-mail:mse_yezm@ujn.edu.cn

中图分类号:

TU525.9

基金项目:

国家自然科学基金资助项目(52302021,52172018);山东省重点研发计划项目(2021CXGC010301)


Effect of Iron Phase Solid Solution with Different Aluminum-to-Iron Ratios on the Hydration of Tricalcium Silicate
Author:
Affiliation:

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

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    摘要:

    主要研究了不同铝铁比的铁相固溶体对硅酸三钙(C3S)水化性能的影响.结果表明,铁相固溶体对C3S的水化具有抑制作用,并且其铝铁比越低,该抑制作用越明显.借助等温量热仪、电感耦合等离子体发射光谱仪(ICP-OES)等测试手段发现,铁相固溶体水化后产生偏铁酸根离子和偏铝酸根离子,其中偏铁酸根离子会阻碍氢氧化钙的沉淀,从而抑制C3S的水化,而偏铝酸根离子可以减轻偏铁酸根离子对C3S水化的抑制作用.

    Abstract:

    The impact of iron phase solid solutions with different aluminum-to-iron ratios on the hydration performance of tricalcium silicate (C3S) was investigated. The results show that iron phase solid solutions inhibit the hydration of C3S, and the lower the aluminum-to-iron ratio in the iron phase solid solution, the more significant the inhibition on C3S hydration. Using testing methods such as isothermal calorimetry and inductively coupled plasma optical emission spectrometer(ICP-OES), it is found that iron phase solid solutions produce metaferrate and metaluminate ions after hydration. The metaferrate ions hinder the precipitation of calcium hydroxide, thereby inhibiting the hydration of C3S, while the metaluminate ions can mitigate the inhibitory effect of the metaferrate ions on C3S hydration.

    图1 不同Ca2AlxFe2-xO5-C3S体系水化热曲线Fig.1 Hydration heat of different Ca2AlxFe2-xO5-C3S systems
    图2 不同体系水化样品的X射线衍射图谱Fig.2 XRD patterns of hydrated samples from different systems
    图3 不同Ca2AlxFe2-xO5-C3S体系相演化图Fig.3 Phase evolution patterns of different Ca2AlxFe2-xO5-C3S systems
    图4 不同Ca2AlxFe2-xO5-C3S体系水化样品中的C3S含量Fig.4 Content of C3S in different hydrated Ca2AlxFe2-xO5-C3S systems
    图5 不同Ca2AlxFe2-xO5孔溶液-C3S体系的水化放热曲线Fig.5 Hydration heat flow of different Ca2AlxFe2-xO5 pore solution-C3S systems
    图6 不同Ca2AlxFe2-xO5-C3S体系样品中的Ca2+浓度Fig.6 Ca2+ concentration in samples of different Ca2AlxFe2-xO5-C3S systems
    图7 不同Ca2AlxFe2-xO5-C3S体系样品孔溶液中的偏铁酸根离子和偏铝酸根离子浓度Fig.7 Metaferrate and metaluminate ion concentration of different Ca2AlxFe2-xO5-C3S systems
    图8 不同Ca2AlxFe2-xO5-C3S体系Ca(OH)2饱和度指数Fig.8 Saturation indexes of Ca (OH)2 in different Ca2AlxFe2-xO5-C3S systems
    图9 不同Ca2AlxFe2-xO5-C3S体系孔溶液中Ca(OH)2的最大饱和度Fig.9 Maximum saturation of Ca(OH)2 in pore solution of different Ca2AlxFe2-xO5-C3S systems
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李全亮,吴佳明,杨庆春,蒋军,叶正茂.不同铝铁比铁相固溶体对硅酸三钙水化的影响[J].建筑材料学报,2024,27(10):871-878

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  • 收稿日期:2024-05-13
  • 最后修改日期:2024-06-04
  • 在线发布日期: 2024-11-08
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