Concrete has the characteristics of rich raw materials, low price and simple production process. At the same time, concrete also has the characteristics of high compressive strength, good durability and wide range of strength. Because of these characteristics, it can be used not only in various civil engineering, but also in shipbuilding, machinery industry and other fields. Some people will ask: in the cold with low temperature, does this low temperature have an impact on concrete? The answer is yes. Let's take a look at the impact of low temperature on concrete

1.低溫條件對(duì)混凝土強(qiáng)度的影響低溫條件會(huì)降低水泥的水合速率,從而影響混凝土的強(qiáng)度發(fā)展。

1. Influence of low temperature conditions on concrete strength. Low temperature conditions will reduce the hydration rate of cement and affect the strength development of concrete.

2.低溫條件對(duì)混凝土早期性能的影響已通過實(shí)驗(yàn)證明:澆筑混凝土?xí)r,如果溫度較低,則初始凝結(jié)時(shí)間和終凝結(jié)時(shí)間會(huì)延長(zhǎng),對(duì)于混凝土的溫度也會(huì)延長(zhǎng),后面的凝固時(shí)間會(huì)更加的明顯。

2. The influence of low temperature conditions on the early performance of concrete has been proved by experiments: when pouring concrete, if the temperature is low, the initial setting time and final setting time will be prolonged, the temperature of concrete will also be prolonged, and the later setting time will be more obvious.

3.低溫條件對(duì)混凝土抗凍性的影響混凝土的抗凍性與混凝土的凍融循環(huán)時(shí)的年齡有關(guān),而混凝土的抗凍性受早期的影響。到多次凍融循環(huán),循環(huán)成熟混凝土的抗凍性之間沒有線性比例關(guān)系。

3. The influence of low temperature on the frost resistance of concrete the frost resistance of concrete is related to the age of concrete during the freeze-thaw cycle, and the frost resistance of concrete is affected by the early stage. To multiple freeze-thaw cycles, there is no linear proportional relationship between the frost resistance of cyclic mature concrete.

4.低溫條件對(duì)混凝土體積穩(wěn)定性的影響。對(duì)于低溫條件下的混凝土結(jié)構(gòu),表面溫度的降低速度明顯大于內(nèi)部溫度的降低速度,從而導(dǎo)致更大的溫度梯度和由此產(chǎn)生的溫度應(yīng)力。

4. The influence of low temperature conditions on the volume stability of concrete. For concrete structures under low temperature, the reduction rate of surface temperature is significantly greater than that of internal temperature, resulting in greater temperature gradient and resulting temperature stress.