摘   要：研究了玄武岩石粉的粒径和替代率0、10%、20%、30%（等质量替代水泥）对高性能混凝土（HPC）工作性和抗氯离子渗透性能的影响，并结合压汞分析技术从微观角度探讨了玄武岩石粉的作用机理。结果表明：随着玄武岩石粉粒径和替代率的增加，HPC的流动度和初凝时间均呈增大趋势；随着玄武岩石粉替代率的增加，HPC的电通量先减小后增大；随着玄武岩石粉粒径的增加，HPC的电通量呈增大趋势；玄武岩石粉的粒径对HPC抗氯离子渗透性能的影响与其替代率紧密相关，当替代率较低时，粒径越小，HPC的抗氯离子渗透性能越好，而当替代率较高时，减小粒径对HPC抗氯离子渗透性能的改善效果不大；玄武岩石粉的填充效应和潜在活性可以提高基体的密实度，从而提高HPC的抗氯离子渗透性能。

Abstract: The influence of particle size and replacement rate(0, 10%, 20%, 30%) of basalt powder on the workability and chloride ion penetration resistance of high performance concrete(HPC) was studied, and the action mechanism of basalt powder was discussed from the microscopic perspective in combination with mercury intrusion analysis technology. The results show that the fluidity and initial setting time of HPC increase with the increase of basalt powder size and replacement rate. With the increase of basalt powder replacement rate, the electrical flux of HPC decreases first and then increases. With the increase of particle size of basalt powder, the electrical flux of HPC increases. The influence of particle size of basalt powder on the chloride ion penetration resistance of HPC is closely related to its replacement rate. When the replacement rate is low, the smaller the particle size, the better the chloride ion penetration resistance of HPC, while when the replacement rate is high, the reduction of particle size has a small impact on the chloride ion penetration resistance of HPC. The filling effect and potential activity of basalt powder can improve the compactness of matrix, thus improving the chloride ion penetration resistance of HPC.