A certain project involves the construction of an existing building starting from the 8th floor.
The concrete construction project involves shear walls with a strength grade of C40.
After demoulding, vertical cracks were found on the wall surface, which were very regular.
There were vertical cracks every 1.
5m to 1.
8m, with sharp ends and a wide middle.
The widest part was about 0.
2mm to 0.
3mm, and some cracks were through cracks.
The concrete strength meets the design requirements and even meets the requirements of C45.
.