The male dormitory building of a certain school has a building area of 6600m2 and a frame structure.
The design strength grade of beam and slab concrete is C25, using commercial concrete.
Construction was carried out from March 13, 2010 to August 28, 2010, and the concrete was cured by watering after pouring.
After demoulding, it was found that there were multiple point like bursts on the concrete surface of the beam and slab components, and the number of burst points increased with the age of the concrete.
To ensure the safe use of the building, the construction party commissioned an appraisal agency to conduct testing and appraisal on the concrete of the project, and analyze the cause of concrete cracking.
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