In this study, the rheology and early reaction process of sodium hydroxide-activated ground granulated blast furnace slag (GGBFS) were investigated. Test results showed a strong relationship between the Vicat initial setting time and ultrasonic pulse wave for NaOH activated slag mixtures identifying the characteristic points or inflection points in the ultrasonic curves and reaching a specific value in the ultrasonic velocity. The early reaction process of the sodium hydroxide-activated slag pastes determined by ultrasonic pulse wave and calorimeter consisted of three stages: dissolution, acceleration/condensation and deceleration stages. The yield stress and apparent viscosity of the pastes increased by the addition of NaOH, and the pastes started to show shear-thickening behavior when NaOH concentration reached 8 M. It was also revealed that Si, Al and Ca ion concentrations in the pore solution increased with an increase in NaOH concentration, and the pore solution of the pastes was dominated by Na and OH⁻. No significant influence of NaOH concentrations upon 4 M on the compressive strength of the mortar samples was observed.

在这项研究中，研究了氢氧化钠活化磨碎粒状高炉渣 (GGBFS) 的流变学和早期反应过程。试验结果表明，NaOH 活化渣混合物的维卡初凝时间与超声波脉冲波之间存在很强的相关性，可识别超声波曲线中的特征点或拐点，并在超声波速度中达到特定值。超声波脉冲和量热仪测定的氢氧化钠活化渣浆的早期反应过程包括溶解阶段、加速/冷凝阶段和减速阶段三个阶段。加入 NaOH 后浆料的屈服应力和表观粘度增加，当 NaOH 浓度达到 8 M 时浆料开始表现出剪切增稠行为。^-。没有观察到 NaOH 浓度在 4 M 上对砂浆样品的抗压强度有显着影响。