In rural two-story ring beam brick structure, cracks appear in the first floor of commercial concrete floor, mainly at the corner of 45 degrees between floor and brick, and some cracks extend along th

In rural two-story ring beam brick structure, cracks appear in the first floor of commercial concrete floor, mainly at the corner of 45 degrees between floor and brick, and some cracks extend along the edge. ... Dear, there are many possibilities for your situation, as follows, just everyone's opinion.

1, stress cracks, should not be reinforced with external angle, which may lead to a 45-degree corner between floor and brick. The main reason is that the concrete shrinkage and temperature difference * * * force the floor to deform, but the corners around the house are restrained by shear walls or floor beams with large bi-directional stiffness, which limits the free deformation, leading to the weak points (such as the ends of separation reinforcement and radial reinforcement in negative M area) cracking first and gradually extending.

2. There is no protective layer on the floor reinforcement, and the protective layer is not in place, which may lead to floor cracking.

3. After the commercial concrete is poured, it is likely to crack due to the high temperature in summer and inadequate maintenance.

Generally, the possibility of the first case is very high, which is a common problem. This usually happens every other floor.