摘   要：通过可蒸发水含量法结合扫描电镜（SEM）微观分析，研究了双掺偏高岭土和石灰石粉对混凝土强度、抗碳化和抗氯离子渗透性能的影响。结果表明，双掺10%偏高岭土和不超过20%的石灰石粉可以细化混凝土孔结构并改善其界面结构，从而提高混凝土强度、抗碳化和抗氯离子渗透性能，双掺时石灰石粉最佳掺量为20%；继续增加石灰石粉掺量对改善混凝土内部结构无益，反而劣化了混凝土性能。

Abstract: The effects of the metakaolin and limestone powder on the strengths, the resistance to carbonation and chloride ions penetration performance are studied by the evaporable water test and scanning electron microscope (SEM). The results indicate that the strengths, the resistance to carbonation and chloride ions penetration performance of concrete mixed with 10% metakaolin and not more than 20% limestone powder are improved, for the pore structure is refined and the interface structure is improved. The optimal replacing dosage of limestone powder is 20%, when double mixing the metakaolin and limestone powder. The properties of concrete mixed with 10% metakaolin and more than 20% limestone powder are degraded for the internal structure is not improved effectively.