After 24 hours, the pouring concrete girder will snow and freeze, and the temperature will be about 3 degrees below zero, which will affect the strength of concrete and the girder will bear the load!

Watering and curing of concrete in winter construction

Generally, beams and columns are wrapped with plastic film immediately after formwork removal, and grass curtains are hung outside. Some people brush curing agent on its surface, but this method has been proved by practice to reduce the strength of concrete, and the surface rebound value is easy to be low.

In general, slab concrete is cured by pouring concrete, immediately covering the surface with plastic film and covering the upper part with straw curtain.

The laying thickness of thermal insulation material is: generally, one layer is laid above 0℃; Spread two or three layers below 0℃; Mass concrete should be covered with insulation layer immediately after pouring and secondary compaction, and the thickness and material of insulation layer should be determined according to calculation.