What is the best way to protect concrete floors against surface carbonation when heaters must be used in cold weather?
Concrete Construction reported on this problem in some detail in the October 1956 issue; page 2. These three specific recommendations were made: (1) Use temporary heaters which do not allow combustion gases to contaminate the air. (2) If unvented heaters must be used, protect the concrete with membrane curing, making sure that the surface is completely sealed. Burlap, for example, may not provide sufficient protection against carbonation. (3) Exhaust combustion gases outside of enclosures whenever salamanders or unvented heaters are used.