电阻率法研究粉煤灰基地聚合物的凝结硬化

采用無電極電阻率測量儀自動連續監測了分別摻加0、10%、30%、50%、70%粉煤灰的地聚合物漿體凝結硬化全過程中的電阻率變化,分析了粉煤灰基地聚合物漿體隨時間發展的物理化學變化規律,探討了偏高嶺土和粉煤灰與堿激發劑之間的反應機理,并將地聚合化反應過程分成:離子釋出、離子重構、凝結硬化及穩定4個特征階段。最后還提出了地聚合化反應過程模型。The electrical resistivity changes with time of various geopolymeric pastes with 0, 10%, 30%, 50% and 70% fly ash are continuously monitoring by using electrodeless resistivity apparatus. The physicochemical process occurred during geopolymerization process is also analysized. According to the characteristics of the resistivity evolution curves, the four stages were well defined: ion release, ion reorientation, setting and hardening, stabilization. Finally, a descriptive microstructural evolution model is proposed.