Second, after concrete pouring, if the climate is hot and the air is dry, the water in the concrete evaporates too quickly, which leads to dehydration, so that the cement particles that have formed gel can not be fully hydrated, can not be transformed into stable crystals, and lack sufficient cohesive force, resulting in flaky or powdery peeling off the concrete surface. In addition, when concrete does not have enough strength, premature evaporation of water will also produce large shrinkage deformation and drying cracks. Therefore, the initial curing after concrete pouring is very important. Concrete should be cured immediately after final setting, and hard concrete should be cured immediately after pouring.