一、概述混凝土冬季施工,国内外采用的防冻早强剂一直以无机盐为主.常用的无机盐以氯盐、硫酸钠和亚硝酸钠居多,它们具有早强效果好,价格低廉等特点,但也存在不少问题,如氯盐引起钢筋锈蚀;硫酸 I. Overview Concrete winter construction, domestic and foreign antifreeze early strength agent has been dominated by inorganic salts. Commonly used inorganic salts are mostly chloride salts, sodium sulfate and sodium nitrite, they have good early effects, low prices, etc. However, there are also many problems, such as chlorine corrosion caused by corrosion of the steel; sulfuric acid