【摘要】 采用不同激发剂制备碱激发矿渣水泥(AAS)砂浆试块，设置不同流速(v)和作用方向的Cl~-侵蚀环境，研究水流作用下AAS砂浆抗Cl~-侵蚀性能的影响机理。此外，引入影响系数K(v)以考虑v对Cl~-扩散系数的影响，并修正水流作用下AAS砂浆Cl~-扩散系数。结果表明：相比切向水流，法向水流对AAS砂浆的微观形貌和孔结构破坏更严重；此外，AAS砂浆的Cl~-侵蚀深度以及Cl~-扩散系数D随着法向水流v的增大而增大；而随着切向水流v的增大呈先增后减的趋势；AAS的抗流动Cl~-溶液侵蚀性能优于普通硅酸盐水泥，水玻璃的激发效果强于NaOH。此外，分别建立了考虑法向和切向水流v作用下AAS砂浆的Cl~-浓度分布时变预测模型。更多还原

【Abstract】 Utilizing different activators to prepare alkali activated slag cement(AAS) mortar specimens, and setting up chloride ion(Cl~-) erosion environments with different water flow velocities(v) and action directions, the influence mechanism fo the Cl~- erosion resistance of AAS mortar under flowing water conditions was explored. Additionally, an influence coefficient K(v) was introduced to account for the effect of v on the Cl~- diffusion coefficient, and the Cl~- diffusion coefficient of AAS mortar under flowing water was adjusted. The results indicate that normal flowing water causes more significant damage to microscopic morphology and pore structure of AAS mortar compared to tangential flowing water. Additionally, both the Cl~- erosion depth and the Cl~- diffusion coefficient(D) of AAS mortar increase with higher normal flow velocities, in contrast, as the tangential flow velocity increases, the D of AAS mortar rises first and then decreases. Furthermore, AAS demonstrated better resistance to Cl~- erosion than ordinary Portland cement, and the excitation effect of water glass was stronger than that of NaOH. Finally, time-varying predictive models for Cl~- concentration distribution in AAS mortar, accounting for both normal and tangential water flow velocities, were developed separately.更多还原