混凝土具有原料丰富,低廉,生产工艺简单等特点,它的用途也是非常的广泛。,同时,混凝土还具有抗压强度高,耐久性好,强度范围广等的特点。这些特性使它不仅可以用于各种土木工程,而且还可以应用于造船,机械工业等领域。
Concrete has rich raw materials, low price, simple production process and other characteristics, its use is also very wide. At the same time, concrete also has the characteristics of high compressive strength, good durability and wide range of strength. These characteristics make it not only can be used in various civil engineering, but also can be used in shipbuilding, machinery industry and other fields.
那低温对混凝土有什么影响呢??对此你了解多少呢?今天
自动混凝土搅拌车厂家的小编就这个问题给你介绍一下,希望对你有所帮助。
What effect does low temperature have on concrete?? How much do you know about it? Today, the automatic concrete mixer manufacturers Xiaobian on this issue to introduce you, I hope to help you.
1.低温条件对混凝土强度的影响低温条件会降低水泥的水合速率,从而影响混凝土的强度发展。
1. The influence of low temperature on the strength of concrete. Low temperature will reduce the hydration rate of cement, thus affecting the strength development of concrete.
低温对混凝土有什么影响呢?
What effect does low temperature have on concrete?
2.低温条件对混凝土早期性能的影响已通过实验证明:浇筑混凝土时,如果温度较低,则初始凝结时间和zui终凝结时间会延长,对于混凝土的温度也会延长,后面的凝固时间会更加的明显。
2. The influence of low temperature on the early performance of concrete has been proved by experiments: when pouring concrete, if the temperature is low, the initial setting time and Zui final setting time will be prolonged, and the temperature of concrete will also be prolonged, and the later setting time will be more obvious.
3.低温条件对混凝土抗冻性的影响混凝土的抗冻性与混凝土的冻融循环时的年龄有关,而混凝土的抗冻性受早期的影响。到多次冻融循环,循环成熟混凝土的抗冻性之间没有线性比例关系。
3. The influence of low temperature on the frost resistance of concrete. The frost resistance of concrete is related to the age of concrete in freeze-thaw cycle, and the frost resistance of concrete is affected by the early age. There is no linear proportional relationship between the frost resistance of cyclic mature concrete and multiple freeze-thaw cycles.
4.低温条件对混凝土体积稳定性的影响。对于低温条件下的混凝土结构,表面温度的降低速度明显大于内部温度的降低速度,从而导致更大的温度梯度和由此产生的温度应力。抗拉强度不足以抵抗该温度下的应力,混凝土表面会出现不规则的可见或不可见裂纹。
4. The influence of low temperature on the volume stability of concrete. For the concrete structure at low temperature, the decreasing speed of the surface temperature is obviously faster than that of the internal temperature, which leads to a larger temperature gradient and the resulting temperature stress. The tensile strength is not enough to resist the stress at this temperature, and irregular visible or invisible cracks will appear on the concrete surface.
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