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The cracking problem of concrete is a common quality problem in engineering construction, which is related to both objective factors such as external environment and subjective factors such as improper construction technology and process operation.
1. Changes in temperature
The change in temperature is the main cause of concrete cracking problems. Under the combined effect of external environmental temperature and internal hydrothermal effect, concrete is very prone to concrete cracking problems. If the internal heat of concrete cannot be effectively released, it will expand due to high temperature, generate certain tensile stress, and damage the stability of the original structure; If the external temperature of concrete is very low and the temperature difference between the inside and outside is large, cracks will appear inside or on the surface of concrete, which is known as temperature cracks.
2. Deformation
If deformation is limited and the tensile strength of concrete is less than the stress of its internal structure, cracks will occur. In addition, concrete can also experience shrinkage cracks, which mainly include two types. One is the deformation caused by the self weight of the concrete structure, which promotes the formation of cracks; Another type is premature bleeding of concrete, which results in cracks due to a lack of moisture in the concrete.
3. Dry shrinkage
Numerous facts indicate that concrete shrinkage can cause cracks on its structural surface. The main reason for such cracks is that the concrete has not been effectively cured after hardening, resulting in rapid loss of surface moisture and significant shrinkage.
4. Uneven foundation settlement
Uneven foundation settlement is also the main cause of concrete cracks. The cracks caused by uneven foundation settlement will increase as the position difference of the settlement part increases.
Note: The article is based on concrete language, authored by Shi Binbin. If there is any infringement, please contact us to delete it. Thank you.
