上个世纪以来,我国混凝土结构物,尤其是桥梁因暴露在不同使用环境下,其使用耐久性降低而使混凝土破坏加剧,结构物难以达到设计使用寿命而不得不废,拆除重建。以桥梁为 Since the last century, the concrete structures in our country, especially bridges, have been exposed to different environments and the durability of concrete has been impaired. As a result, the destruction of concrete is aggravated. The structure can not reach the designed service life and has to be scrapped and demolished. To bridge for