Title: Is Your Heater Damaging Your Concrete?
Author(s): Wally Rooke
Publication: Concrete International
Appears on pages(s): 37-40
Concreting in the winter cold usually means supplementary heat is needed to keep the workers and the concrete warm. But what type of heaters should you be using to avoid carbonation damage to exposed concrete surfaces, such as floor slabs, during placing and the early stages of curing? Whether the heater is placed inside or outside the work enclosure, if the site heater doesn’t have a chimney discharging all combustion gases outside—if you can see the flames or can’t find a flue line to the outdoors—you must be aware of CO2 emissions if you are placing exposed concrete.