In this study, the effects of limestone powder on the rheological behavior, pore solution chemistry, mechanical properties and microstructure of alkali-activated cements have been investigated. The results exhibit that, with the increasing content of limestone powder in the ternary alkali-activated system, the structural build-up of the mixture increases earlier. It was observed that flow curves of pastes fit the Bingham model well. With the increasing content of fly ash in the ternary mixtures, the plastic viscosity decreased as expected by the particle packing effect and the increased water film thickness as well as the spherical shape of fly ash particles. As a result of the higher specific surface and improved nucleation provided by the limestone powder, the reaction process was enhanced and accelerated for the mixtures with higher limestone powder contents. The calcium and alumina concentrations in the pore solution rapidly evolved at first for a certain time, but decreased afterwards. The significant influence of the Ms value of the activator was observed on the evolution of the elemental concentrations. Microstructure analysis revealed that the early age reaction product is C-A-S-H for the slag mixtures incorporating limestone or fly ash. The compressive strength of the ternary mixtures decreased with the incorporation of limestone powder due to the inert character of the limestone powder.

在本研究中，研究了石灰石粉对碱活化水泥的流变行为、孔隙溶液化学、力学性能和微观结构的影响。结果表明，随着三元碱活化体系中石灰石粉含量的增加，混合物的结构积累增加得更早。观察到糊剂的流动曲线很好地拟合宾汉姆模型。随着三元混合物中粉煤灰含量的增加，由于颗粒堆积效应和水膜厚度的增加以及粉煤灰颗粒的球形形状，塑性粘度下降，正如预期的那样。由于石灰石粉末具有更高的比表面积和更好的成核，对于石灰石粉含量较高的混合物，反应过程得到加强和加速。孔隙溶液中钙和氧化铝的浓度在一定时间内开始迅速变化，但随后下降。观察到活化剂的 Ms 值对元素浓度的演变有显着影响。微观结构分析表明，早期反应产物是掺有石灰石或飞灰的矿渣混合物的 CASH。由于石灰石粉末的惰性，三元混合物的抗压强度随着石灰石粉末的加入而降低。观察到活化剂的 Ms 值对元素浓度的演变有显着影响。微观结构分析表明，早期反应产物是掺有石灰石或飞灰的矿渣混合物的 CASH。由于石灰石粉末的惰性，三元混合物的抗压强度随着石灰石粉末的加入而降低。观察到活化剂的 Ms 值对元素浓度的演变有显着影响。微观结构分析表明，早期反应产物是掺有石灰石或飞灰的矿渣混合物的 CASH。由于石灰石粉末的惰性，三元混合物的抗压强度随着石灰石粉末的加入而降低。