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首页> 外文期刊>Advanced Science Letters >Effect of Limestone Powder on Microstructure and Strength of Ultra High Performance Cement-Based Materials
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Effect of Limestone Powder on Microstructure and Strength of Ultra High Performance Cement-Based Materials

机译：石灰石粉对超高性能水泥基材料微观结构和强度的影响

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摘要

The effect of limestone powder on microstructure and strength of ultra high performance cement-based materials was studied by using scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA) and strength test instrument in this paper. The results show that limestone powder has filling effect, active effect and accelerating effect during hydration process of complex binder under the condition of high temperature steam curing. The particle size of limestone powder is much smaller than that of cement and fly ash, which forms better particle size gradation with cement than fly ash; it will fill the voids in the matrix and generate denser microstructure. Limestone powder can speed up the hydration process of complex binder at high temperature steam curing due to its accelerating effect and react with ordinary Portland cement to produce calcium monocarboaluminate hydrates, which will be benefit to the strength development. When its content is lower than 10%, it has little adverse effect on the strength of ultra-high performance cement-based materials. In addition, the appliance of limestone powder to ultra high performance cement-based materials will achieve certain technical, economic and ecological benefits.
机译：利用扫描电子显微镜（SEM），X射线衍射（XRD），热重和差热分析（​​TG-DTA）以及强度测试仪研究了石灰石粉对超高性能水泥基材料的组织和强度的影响。在本文中。结果表明，在高温蒸汽养护条件下，石灰石粉在复合粘结剂水化过程中具有充填，活化和促进作用。石灰石粉的粒度远小于水泥和粉煤灰，与水泥相比，粉煤灰可形成更好的粒度等级。它将填充基质中的空隙并产生更致密的微观结构。石灰石粉体由于具有促进作用，可加快高温蒸汽固化过程中复合粘结剂的水化过程，并与普通硅酸盐水泥反应生成单碳铝酸钙水合物，有利于强度的发展。当其含量低于10％时，它对超高性能水泥基材料的强度几乎没有不利影响。此外，将石灰石粉应用于超高性能水泥基材料将获得一定的技术，经济和生态效益。

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