PROBLEM TO BE SOLVED: To provide a concrete material for placing in a cold weather which is capable of suppressing or preventing the occurrence of crack being initial defect caused by dry shrinkage in a surface member constituting a structure such as a slab or wall surface particularly to be ...
In this case, when the air temperature is low, a cover is erected at the side of the canopy A for heat insulation, thereby preventing the concrete from freezing and enabling a work to be executed without any influence of the weather such as rain, wind, heat and cold, or the like, as...