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首页> 外文期刊>Cement & concrete composites >Quantitative correlations among textural characteristics of C-S-H gel and mechanical properties: Case of ternary Portland cements containing activated paper sludge and fly ash
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Quantitative correlations among textural characteristics of C-S-H gel and mechanical properties: Case of ternary Portland cements containing activated paper sludge and fly ash

机译：C-S-H凝胶质地特性与力学性能之间的定量关系：含活性纸污泥和粉煤灰的三元波特兰水泥案例

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摘要

The hydraulic activity of ternary Portland cements containing different proportions of commercial thermally activated paper sludge (APS(I)) and fly ash (FA) from coal combustion was evaluated from the textural characterization of the C-S-H gels formed during hydration. The study was accomplished by means of the specific surface area (SSA) and pore-size distribution (PSD), which were measured by the sorption isotherms of nitrogen gas and the BET method. The microstructure was characterized by scanning electron microscopy (SEM). The incorporation of such admixtures (APS and FA) clearly revealed an increase in both porosity and SSA. This effect decreased with the progress of hydration, together with a refinement of the nano-porous structure of C-S-H. In addition, high correlations were found between nano-structural characteristics of the C-S-H gel and mechanical compressive strengths.
机译：从水化过程中形成的C-S-H凝胶的结构特征评估了含有不同比例的燃煤燃烧产生的商业热活化纸污泥（APS（I））和飞灰（FA）的三元波特兰水泥的水力活性。该研究是通过比表面积（SSA）和孔径分布（PSD）来完成的，这些比表面​​积是通过氮气的吸附等温线和BET方法测量的。通过扫描电子显微镜（SEM）对微观结构进行表征。掺入此类添加剂（APS和FA）清楚地表明，孔隙率和SSA均增加。随着水合作用的进行，以及C-S-H纳米孔结构的细化，这种作用降低了。另外，发现C-S-H凝胶的纳米结构特征与机械抗压强度之间具有高度相关性。

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