摘要：
In this paper,a reservoir of Guizhou sluice floor served for about 40 years as the re-search object of the concrete core samples,the aging test and durability evaluation experiment.The aging test showed that the carbonation depth is less than 40 mm,concrete carbonization layer,not carbonized layer,the interface between transverse splitting strength values are small,transverse splitting strength val-ue floating range were 1.91 ~2.82,2.70 ~4.94,2.48 ~3.75 MPa range,the carbonation depth is small,not easy carbonation of concrete carbonation,the carbide carbide changes of concrete strength con-crete,little.Durability assessment test showed that,for C35 cast in situ concrete specimens,in the 4D, 8D,10 d,its strength decreased by 3.2%,4.6%,7.9%,respectively,and the final C35 is the strength of the cast-in-place test pieces tend to be stable.After immersion in 15% H2 SO4 solution,concrete core samples,C35 cast in situ concrete transverse splitting strength,with the increase of the number of days of immersion is a decreasing trend,the core samples of pure water immersion showed an increasing trend.The corrosion rate of cast in place concrete is not linearly related with the time change,and the core like concrete has a linear relationship with the C35.%以贵州某水库服役约40 a 的泄洪闸底板的混凝土钻芯样为研究对象，对其老化测试和耐久性评估试验进行了研究。老化测试表明，碳化深度小于40 mm，混凝土碳化层、未碳化层、交接面的横劈强度值相差较小，横劈强度值浮动范围分别为1.91～2.82、2.70～4.94、2.48～3.75 MPa 范围内浮动，在碳化深度较小时，不易碳化的混凝土碳化后，其未碳化混凝土、碳化混凝土强度变化不大。耐久性评估试验表明，对于 C35现浇混凝土试件，在4、8、10 d，其强度下降分别比芯样快3.2％、4.6％、7.9％，最后 C35现浇试件强度趋于平稳。经15％的 H2 SO4溶液浸泡后，混凝土芯样、C35现浇混凝土横劈强度，随着浸泡天数的增加均呈减小趋势，纯净水浸泡的芯样则呈增大趋势。C35现浇混凝土蚀强率随着时间变化不呈线性关系，芯样混凝土呈线性关系。
