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1 混凝土冻害原理水泥与水的水化作用是混凝土强度增长的关键。当气温降到0℃时,混凝土表面的水分将部分结冰,水化作用减少,混凝土强度增长变慢,当温度低于-3℃时,混凝土内部自由水结冰,水化作用将完全停止,混凝土强度也不再增长,混凝土内水结冰后体积膨胀8%～9%,在混凝土内产生应力,使尚未硬化的水泥石结构松疏,并产生微裂纹,这些现象可造成骨料之间
A concrete frost damage principle Cement and water hydration is the key to the strength of concrete. When the air temperature drops to 0 ° C, the water on the concrete surface will partly freeze, the hydration will decrease and the concrete strength will grow slowly. When the temperature is lower than -3 ° C, the free water in the concrete will freeze and the hydration will stop completely , The strength of the concrete will not increase any more. The volume of water in the concrete will expand by 8% ~ 9% after it is frozen, causing the stress in the concrete, causing the cement structure not yet hardened to loose and causing microcracks. These phenomena can cause aggregate between