What is a 45 degree crack in the floor slab ?

Hello dear, glad to answer this question for you. A 45-degree crack in the floor slab refers to a crack in an oblique angle of about 45° that occurs about 1 meter from the corner of the floor slab. The main reason for the 45-degree crack is that the concrete shrinkage and the temperature difference force the floor slab to deform, but the four corners of the house are due to the shear walls in the vertical and horizontal directions.

The living frame beam restraint prevents it from deforming freely, causing cracking in weak points, and gradually developing. I hope mine is helpful to you and I wish you a happy life.

Hello dear, I'm glad for you with this question. A 45-degree crack in a floor slab is an inclined crack of about 45° that occurs about 1 m from the corner of the floor slab. The main cause of the 45-degree crack is the shrinkage of the concrete and the temperature difference forcing the deformation of the floor slab.

However, the corners around the house are constrained vertically and horizontally by shear walls and live frame beams to prevent them from deforming freely, causing weak points to crack and develop gradually. I hope mine is helpful to you. I wish you a happy life.

Summary. Reason 1 for the 45-degree penetration crack of the floor slab may be because the distance between the steel bars is too large when the floor is reinforced, resulting in cracks at the four corners of the floor slab. 2. It may be because the quality of the steel bars in the floor slab is relatively poor, so the four corners are cracked.

3. It may be because of the uneven sinking of the house, resulting in 45 degree cracking at the four corners of the floor slab. What are the reasons for the cracking of cast-in-place floor slabs, mainly due to temperature, foundation, external force, embedded pipelines and other reasons. Among them, the temperature problem is that cracks are easy to appear, and the temperature difference causes the material to deform and crack; If there is uneven settlement activity in the foundation, cracking is inevitable, and even cracks that are difficult to repair will occur; The diameter of the embedded pipeline is large, and the problem of insufficient load-bearing will lead to cracks.

Reason 1 for the 45-degree penetration crack of the floor slab may be because the distance between the steel bars is too large when the floor is reinforced, resulting in cracks at the four corners of the floor slab. 2. It may be that the quality of the steel bars in the floor slab is relatively poor, so the four corners are cracked. 3. It may be because of the uneven sinking of the house, resulting in 45 degree cracking at the four corners of the floor slab.

What are the reasons for the cracking of cast-in-place floor slabs, mainly including temperature, foundation, external force, and pre-buried early thick pipelines. Among them, the temperature problem is that cracks are easy to appear, and the temperature difference causes the material to deform and crack; If Luzhen is the foundation has uneven settlement activities, cracking is inevitable, and even cracks that are difficult to repair will appear; The diameter of the embedded pipeline is large, and the problem of insufficient load-bearing will lead to cracks.

Hello, my penetrating crack is about five or six meters long, but the crack is not very thick, so is it all a quality problem?

It's a matter of quality.

Profound. <>

The cast-in-situ floor slab of the house is about 1m away from the four rotation angles, resulting in an inclined angle crack of about 45 degrees.

Floor cracks are the phenomenon of cracking in the floor part of a building structure. According to the cause of cracking, it can be divided into the following two types. One:

Cracks caused by force. The main reasons are the uneven settlement of the foundation, the serious lack of concrete strength and concrete slab thickness, disasters and accidents. Two:

Cracks that are not caused by force. It is mainly caused by factors such as temperature, shrinkage and expansion, and construction.

Due to the serious lack of concrete strength and concrete slab thickness, and the cracks caused by disasters and accidents, the impact on the structure is greater, and scientific methods need to be adopted to repair and strengthen the concrete cracks.

About 90% of floor cracks are caused by temperature and shrinkage, and such cracks can be repaired using automatic low-pressure grouting. Automatic low-pressure grouting technology is a comprehensive technology including materials, machinery and tools.

Seriously. It is not safe to have a crack in the floor slab at a 45-degree angle.

Seriously. It is not safe to have a crack in the floor slab at a 45-degree angle.

The main reason for the 45-degree angle crack in the floor slab is that the distance between the floor reinforcement plates is too large, especially the steel bar that resists the negative moment on the board surface is not usually configured, which will lead to the crack situation near the edge of the slab along the end of the negative moment bar, and there is not enough configured steel bar, and there will be 45-degree angle tilt cracking after use.

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The corner of the building is about 1 meter into 45 inclined cracks, how is the safety of the house.

What needs to be paid attention to is that it is not as safe as imagined, and there are certain security risks.

Is there a remedy?

It is newly built in less than 5 years.

It is newly built in less than 5 years.

It is not recommended to live again. If the walls and pillars in the house are tilted, and the inclination rate is greater than or there are fractures and joints in the adjacent wall connections, it means that the house is already in danger and cannot be lived in at this time.

Walls, columns are fine.

The inclined place is easy to photograph**.

It's not sloping, it's the slab that has two corner slabs around it.

It is a common problem that the cast-in-place floor slab of the house is about 1m away from the four rotation angles, and the bevel cracks of about 45 degrees are generated. The main cause is that the concrete shrinkage and temperature difference force the floor slab to deform, but the four rotation angles of the house are constrained by the shear wall in both vertical and horizontal directions or the floor beam with large stiffness, which restricts the free deformation, resulting in the weak point (such as the end of the separated reinforcement and radial reinforcement in the negative M area) cracking first, and gradually developing.

Answer 1: It is not safe if there is a crack in the 45-degree angle of the floor of the house. The specific crack depends on the actual situation and the actual situation. If the house has only one floor, then there is generally no big safety problem in this situation, and if it is a high-rise building, there must be a safety problem.

2. The 45-degree angle crack occurs in the floor slab, and the main reason for it is that the distance between the floor reinforcement plates is too large, especially the steel bars that resist the negative moment on the board surface are not usually configured, which will lead to cracks near the end of the negative moment tendons near the edge of the slab, and there is no enough configured steel bar, and there will be 45-degree angle inclined cracking after use.

Hello, it is recommended that you contact a professional for a practical assessment