Synergistic influences of ground granulated blast-furnace slag and silica fume on the viscosity of extremely low W/B cement pastes

Cong Thang Nguyen, Q. Phung, Van Tuan Nguyen
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Abstract

Particularly with a low water/binder ratio, the synergistic effects of supplemental cementitious materials (SCMs) have drawn a lot of interest in improving the characteristics of cement-based products. The effects of SCMs, such as silica fume (SF) and ground granulated blast furnace slag (GGBS) with varying fineness, on the setting time, saturation point, and viscosity of ultra-high performance cement pastes (UHPCP), are examined experimentally in this work. 56 mixes with various SF and BFS substitutions and exceptionally low water/binder ratios (0.16, 0.20) were used in the experiments. This work demonstrates the synergistic effects of SCMs from several angles, including the UHPCP fresh characteristics. It is shown that carefully regulating the water/binder ratio, the BFS fineness, and most significantly the addition of an ideal SF content will have a beneficial synergistic effect on the fresh qualities of UHPCP. However, utilizing high BFS replacement is discouraged as it may have a negative impact on viscosity.
磨细高炉矿渣和硅灰对极低 W/B 水泥浆粘度的协同影响
特别是在水/粘合剂比率较低的情况下,补充胶凝材料(SCM)的协同效应在改善水泥基产品特性方面引起了广泛关注。本研究通过实验研究了不同细度的硅灰(SF)和磨细高炉矿渣(GGBS)等 SCM 对超高性能水泥浆(UHPCP)的凝结时间、饱和点和粘度的影响。实验中使用了 56 种不同 SF 和 BFS 替代物以及超低水/粘合剂比率(0.16、0.20)的混合料。这项工作从多个角度证明了 SCM 的协同效应,包括 UHPCP 的新鲜特性。实验表明,仔细调节水/粘合剂比例、BFS 细度,最重要的是添加理想的 SF 含量,将对 UHPCP 的新鲜质量产生有益的协同效应。但是,不鼓励使用高的 BFS 替代率,因为它可能会对粘度产生负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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