论文部分内容阅读
冬天,寒冷的气候给建筑部门带来不少困难。就说混凝土吧,气温低,混凝土凝固以后,强度上不去。本来十几个小时可以拆模,现在就不行了。要是气温再低,混凝土里面冷到-5℃左右,大部分水也要冻成冰碴,那就更糟了。水不是0℃就能结冰吗?不错,净水在0℃就要结冰,但是,混凝土碱性大,里面空隙也特别小,使水结冰的温度降低了。硬化不久的混
In winter, the cold climate has brought difficulties to the construction sector. Let’s say concrete bar, the temperature is low, and after the concrete is solidified, the strength will not go up. Originally, more than ten hours could be demolished. Now it is not enough. If the temperature is lower and the concrete is cooled to around -5°C, most of the water will be frozen into hail, which is even worse. Can water freeze at 0°C? Well, clean water will freeze at 0°C. However, the concrete is alkaline and the voids are particularly small, which lowers the temperature of water freezing. Harden mixed soon