1. Concrete is a porous material
Concrete is a porous material that can absorb water from the ground. As the water seeps into the concrete, it expands and puts pressure on it, causing it to crack.
2. Temperature changes
Temperature changes can also cause cracks in concrete. In the winter, when water freezes, it expands and puts pressure on the concrete. When the temperature gets hot in the summer, the concrete can also expand and crack.
Shrinkage is another common cause of cracks in concrete. As concrete dries, it shrinks slightly. This shrinkage can cause cracks, especially if the concrete is not adequately supported.
4. Poorly compacted subgrade
Poorly compacted subgrade can also cause cracking. If the soil beneath the concrete is not compacted correctly, it can settle and cause the concrete to crack.