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首页> 美国卫生研究院文献>Materials >The Influence of Mayenite Employed as a Functional Component on Hydration Properties of Ordinary Portland Cement
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The Influence of Mayenite Employed as a Functional Component on Hydration Properties of Ordinary Portland Cement

机译：钙铝石作为功能组分对普通硅酸盐水泥水化性能的影响

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Influence of C12A7 (12CaO·7Al2O3) as a functional component on hydration properties of Ordinary Portland Cement is studied using isothermal microcalorimetric technique, X-ray diffraction analysis, and thermodynamic calculation. Meanwhile, hydrate assemblages are simulated by hydrothermal software. C2AH8 (2CaO·Al2O3·8H2O) is generated as a transition phase during the hydration of pure C12A7, while formation of CAH10 (CaO·Al2O3·10H2O) is uncertain. Heat-releasing behavior of Ordinary Portland Cement (OPC) could be noticeably affected by C12A7, especially for the duration of interaction at boundary stage reduces with C12A7 replacement. Correspondingly, all hydration kinetic parameters first increase and then diminish with C12A7 replacement. Simulation results manifest in the main hydration products of OPC being ettringite, C-S-H (Calcium-Silicate-Hydrate) gel, portlandite and brucite. Increasing C12A7 replacement accelerates the consumption rates of gypsum and calcite that are typically included in OPC, and thus the ettringite content is changed and carbonate phases will be produced. Therefore, the microstructure properties of hydrated products of OPC are affected and the compressive strength is influenced. These predications are in good agreement with experimental findings. C12A7 can be used as a functional component to adjust the consumption rate of suphates in OPC, and also components of carbonate phases can be modified in hydrate assemblage.
机译：利用等温微量热法，X射线衍射分析和热力学计算方法研究了C12A7（12CaO·7Al2O3）作为功能组分对普通硅酸盐水泥水化性能的影响。同时，利用水热软件模拟了水合物的组合。 C2AH8（2CaO·Al2O3·8H2O）在纯C12A7的水合过程中作为过渡阶段生成，而CAH10（CaO·Al2O3·10H2O）的形成尚不确定。 C12A 7 可以显着影响普通硅酸盐水泥（OPC）的散热性能，特别是随着C 12 A 在边界阶段相互作用的持续时间减少7 替换。相应地，所有的水合动力学参数首先增加，然后随着C 12 A 7 的替换而减小。模拟结果表明，OPC的主要水合产物为钙矾石，C-S-H（钙-硅酸盐-水合物钙）凝胶，硅酸盐和水镁石。增加C 12 A 7 的替代量会加快OPC中通常包含的石膏和方解石的消耗速度，从而改变钙矾石的含量并产生碳酸盐相。因此，影响了OPC的水合产物的微观结构性能并影响了抗压强度。这些预测与实验结果非常吻合。 C 12 A 7 可以用作调节OPC中磺酸盐消耗速率的功能组分，并且可以在水合物组合物中修饰碳酸盐相的组分。

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