In real life, you can see some cracks in the wall. Maybe many people think that this is caused by problems in the construction of the building. Actually, the building constructed of reinforced concrete is more or less under the influence of external forces. Cracks will appear. What are the causes of the cracks and what types of performance are there? Let's take a look!
1. Uneven settlement of buildings
When uneven settlement occurs in the building, the overall stiffness and stiffness of the building will be deteriorated, resulting in irregular longitudinal and horizontal deformation. At the same time, the entire substrate is also unable to withstand its inflexibility, resulting in shear forces in some parts of the brickwork. When the deformability is insufficient to resist, cracks are created.
Cracks caused by uneven settlement of houses are generally expressed as cracks in the horizontal or vertical direction, and cracks in these walls are cracked. In severe cases, the houses may collapse, which usually occurs in the first floor. Under other special circumstances, other floors may also occur.
2. The temperature difference existing in the building
Cracks caused by this factor are mostly found in brick-concrete multi-storey houses. If the roof of a house is made of reinforced concrete slabs and the walls are brick walls, it is easy to produce cracks due to temperature differences, not only because the coefficient of linear expansion of the materials between the roof and the wall is doubled. , But also because the roof receives solar radiation area is much larger than the wall of the irradiated area.
Summer and winter are easily affected by temperature, resulting in wall cracking. In the early days, temperature was the dominant factor in the formation of cracks, and the formed cracks would take some time to stabilize and would not continue to develop. Such cracks generally show horizontal seams, positive eight-character seams, and inverted eight-character seams.
3. Other reasons in the decoration process
Some problems that arise in the renovation can also lead to cracking of the wall. For example, when plastering cement ash, improper proportioning of cement slurry can lead to wall cracking; wall putty scraping is not uniform; improper matching of water and emulsion paint, etc. These unsatisfactory fitting operations can lead to cracks .
In general, such cracks show irregular linearity, and the overall impact is not great. It does not affect the safety of living, but only affects the aesthetics of home decoration.
4 long concrete structure
With the increase of concrete strength grades, the development of large-scale buildings, and the application of the mercury-transporting concrete technology in construction, the floors are continuously increasing, which causes the temperature difference in the ultra-long concrete structure to become large, resulting in shrinkage cracks .
In general, such cracks appear as horizontal seams, regular eight-character seams, and inverted eight-character seams. However, such cracks will not have any impact on the current situation and will not affect the overall structural safety and bearing capacity. However, they will endanger the durability and integrity of the overall structure and bring a very bad life experience to users. .
Xiaobian conclusion: Through the above Xiaobian on the causes of cracks and its presentation, do you have a better understanding of it? Hope that friends in this area will be helpful, want to know or consult more More decoration knowledge, welcome to pay attention to this site!
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