What is the effect of temperature on the performance of concrete mixer? Technical personnel of Zhongke Jufeng factory pointed out that low ambient temperature and slow hydration reaction of cement affected the strength growth of concrete mixer. The test of concrete mixer manufacturer shows that the hydration of cement decreases about 5% ~ 7% when the temperature decreases by 1 ℃.

在1℃~0℃范围内，水泥水化活性急剧下降，水化缓慢通常，当温度低于0℃的某个范围时，自由水将开始冻结。当温度低到一定程度时，自由水将几乎完全冻结成冰，导致水泥完全停止水化和硬化。

In the range of 1 ℃ to 0 ℃, the hydration activity of cement decreases sharply and the hydration is slow. Generally, when the temperature is lower than a certain range of 0 ℃, the free water will start to freeze. When the temperature is low to a certain extent, the free water will almost completely freeze into ice, leading to the complete stop of hydration and hardening of cement.

中科聚峰厂家

Zhongke Jufeng factory

当水转化为固体冰时，其体积增加约9%，导致混凝土内部应力。温度导致骨料和水泥颗粒相对位移，内部水分迁移到混凝土搅拌机的负温度表面，在混凝土中形成冰骨料，造成局部结构损坏混凝土搅拌机制造商指出，新浇混凝土过早冻结将大大降低极限强度，强度损失率可能达到设计标志的50%，甚造成整体结构损坏。

When water is transformed into solid ice, its volume increases by about 9%, resulting in the internal stress of concrete. The temperature causes the relative displacement of aggregate and cement particles, and the internal moisture migrates to the negative temperature surface of the concrete mixer, forming ice aggregate in the concrete, causing local structural damage. The manufacturer of the concrete mixer points out that the premature freezing of the fresh concrete will greatly reduce the ultimate strength, and the strength loss rate may reach 50% of the design mark, or even cause the overall structural damage.

然而，当混凝土达到临界强度后冻结时，混凝土的极限强度损失很小，不会发生整体结构损伤。降低冰点的范围与防冻剂的类型和剂量或溶液的浓度有关。防冻剂的使用效果在很大程度上取决于溶液的浓度和混凝土在硬化过程中经历的负温度值。

However, when the concrete reaches the critical strength and freezes, the ultimate strength loss of concrete is very small, and the whole structure will not be damaged. The range of reducing freezing point is related to the type and dosage of antifreeze or the concentration of solution. The effect of antifreeze depends largely on the concentration of solution and the negative temperature value of concrete in the hardening process.

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