Abstract: As time goes by, aging would be found with the concrete dams which can be attributed to physical and chemical reactions.In detail, the integrated elastic modulus and safety margin would decrease and rehabilitation is critical to safety operation.This paper analysed the aging process of concrete dams and discussed their expected life span.

摘要： 随着坝龄的增长，混凝土坝不断产生物理性和化学性变化，若干年后老化现象逐渐显露出来，混凝土综合弹性模量下降，安全裕度减小，直到安全等级降低，必须进行补强加固才能保证安全运行。本文对混凝土坝老化过程进行分析，并对其“预期寿命”进行初步探讨。