在混凝土拌合物搅拌时将亚硝酸钙防锈剂按一定掺量掺于混凝土中能够保护混凝土中的钢筋和其它埋入铁件。如果混凝土中氯化物的含量达到890克/米~3时,钢筋就会生锈。美国为了保护桥梁混凝土中的钢筋不致生锈,有几个州已把亚硝酸钙的使用结合进其设计中。伊利诺斯州自1980年以来就使用亚硝酸钙阻锈剂保护箱形梁;自1983年开始就在64毫米厚的桥面板中开始应用。密执安州和俄亥俄州在1984年开始用阻锈剂保护预应力梁。也在这一年,缅因州把亚硝酸钙掺 When the concrete mixture is stirred, the calcium nitrite rust inhibitor is added to the concrete in a certain amount to protect the steel bars and other embedded iron pieces in the concrete. If the content of chloride in the concrete reaches 890 g/m~3, the steel bar will rust. In order to protect the reinforcing steel in bridge concrete from rust, several states have incorporated the use of calcium nitrite into their design. Illinois has used calcium nitrite rust inhibitors to protect box beams since 1980; it has been applied in 64 mm thick bridge decks since 1983. In 1984, Michigan and Ohio began using preservatives to protect prestressed beams. In the same year, Maine added calcium nitrite