Abstract In limestone calcined clay cements (LC3), more hemicarboaluminate and monocarboaluminate is observed, as compared to other blended cements, from the reaction of metakaolin with limestone. In this study, it is shown that the formation of these carboaluminate phases, predominantly occurs during a “third” hydration peak, after the main alite and aluminate peaks. The influence of the metakaolin content, level of sulfate addition and the water to binder ratio on the position and magnitude of this peak were investigated. This precipitation of hemi and monocarboaluminate has a significant effect on porosity refinement and strength development. It was also observed that alumina from metakaolin can contribute to the precipitation of ettringite if sufficient sulfate is available.

中文翻译：

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偏高岭土与石灰石的反应及其对孔隙细化和力学性能的影响

摘要 在石灰石煅烧粘土水泥 (LC3) 中，与其他混合水泥相比，偏高岭土与石灰石的反应产生了更多的半碳铝酸盐和单碳铝酸盐。在这项研究中，表明这些碳铝酸盐相的形成主要发生在“第三”水合峰期间，在主要的 alite 和铝酸盐峰之后。研究了偏高岭土含量、硫酸盐添加量和水与粘合剂比对该峰的位置和大小的影响。半和一碳铝酸盐的这种沉淀对孔隙度细化和强度发展具有显着影响。还观察到如果有足够的硫酸盐可用，来自偏高岭土的氧化铝可有助于钙矾石的沉淀。