Jin Yu, Feng Weipeng, Zheng Dapeng, Dong Zhijun
Institute of Technology for Marine Civil Engineering, Shenzhen Institute of Information Technology, Shenzhen 518172, China.
Key Laboratory for Resilient Infrastructures of Coastal Cities (MOE), College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.
Materials (Basel). 2023 Nov 3;16(21):7032. doi: 10.3390/ma16217032.
In this study, we examined the early-stage interaction of three types of slag and six activators with different chemical compositions. To determine the degree of hydration (DOH) and hydrate assemblage in alkali-activated slag (AAS), we employed EDX, XRD, and NMR analyses. We found that with increasing silicate concentration in the activator, the DOH in the AAS varied, whereas the proportion of C-(N)-A-S-H increased and the other Al-containing phase decreased. When examining the impact of the activator on glass dissolution, it is apparent that an index based on the degree of depolymerization of the glass structure correlates with the DOH and the proportion of hydrotalcite in the AAS. Coupled with the activator's modulus, this index can be utilised to elucidate the dissolution-reprecipitation mechanism that governs the interaction between the activator and slag.
在本研究中，我们考察了三种不同化学成分的矿渣与六种激发剂的早期相互作用。为了确定碱激发矿渣（AAS）中的水化程度（DOH）和水化物组合，我们采用了能谱分析（EDX）、X射线衍射分析（XRD）和核磁共振分析（NMR）。我们发现，随着激发剂中硅酸盐浓度的增加，AAS中的DOH发生变化，而C-(N)-A-S-H的比例增加，其他含铝相减少。在考察激发剂对玻璃溶解的影响时，很明显，基于玻璃结构解聚程度的一个指标与AAS中的DOH和水滑石的比例相关。结合激发剂的模量，该指标可用于阐明控制激发剂与矿渣相互作用的溶解-再沉淀机制。
