Abstract: After years of operation, carbonization layer was found on the concrete surface of Danjiangkou dam. For operation safety, treatment measures were carried out and two-component polyurea protective material was adopted to stop the further carbonization of concrete. This paper introduced the application of the material, for reference.

Key words: old dam body, polyurea anti-seepage material, anti-carbonization

摘要： 南水北调中线水源丹江口大坝经多年运行后，老坝体混凝土表面产生碳化层。为保证大坝健康运行，按照设计通知要求对其老坝体表面进行处理，并刮涂聚脲类防渗材料，以阻止老坝体混凝土碳化加重，从而保证老坝体混凝土的使用性能以及耐久性。

关键词: 老坝体, 聚脲防渗材料, 防碳化