一、混凝土冻害原因混凝土路面应尽可能在高于5C的气温条件下施工。因为其强度增长主要靠水化作用,水结冰时,水化作用停止,而且水结冰时,体积会膨胀,促使混凝士结构松散破坏,因此,当昼夜平均气温低于一5C First, concrete frost damage causes Concrete pavement should be as high as 5C in the construction of the temperature conditions. Because of the strength of its growth mainly by hydration, water freezing, hydration stops, and the water ice, the volume will be expanded, prompting the coagulation structure loosely damaged, therefore, when the average day and night temperatures below 5C