Concrete Freezer Floor Design
Olivia Luz
Freezer store concrete floors or wearing slabs must incorporate all the requirements of normal warehouse floors with a few extras for freezing.
The pink and black coloring on the concrete is microbial growth due to constant and heavy condensation. The major problem with concrete freezer floors is frost buildup under the floor which will cause the floor to lift or heave often destroying the floor and the walls of the freezer as well. Finished floor in freezer applications this surface is typi cally concrete. Type and thickness of insulation this design guide is based on industry standards with a thermal conductivity of.
There is so much more to installing freezer floors than simply pouring concrete and then building the freezer around the poured concrete floor. Moisture from the ground below the box is drawn toward the cold freezes expands and so on. Further make sure the concrete has the lowest practicable water cement ratio to get the concrete properly consolidated and finished. Walk in freezer concrete floor construction requires a specially cured solution that can handle constant sub freezing temperatures.
Get a specific design completed from outside drill holes under the freezer add heat to these holes to melt the ice formation once melted floor can be maintained at a normal operating temperature and at normal budget costs. Most ready mix suppliers are going to throw you a mix design with a w c ratio of 0 55 or higher. Photo 3 shows the exposed concrete ceiling in a retail store below a supermarket freezer room. If the temperature of the subfloor approaches freezing usually plus 4 degrees c is taken as the danger point then any water moisture in the subfloor will freeze.
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Make sure it is below 0 50 and preferably in the 0 45 range. This concrete is also required to be strong enough to support heavy equipment traffic from forklifts and other machinery. This normally leads to the concrete floor rising and cracking as the rise is variable over the floor area. Industrial floor designresidential concrete slabs often have few design requirements to get between the contractor and completion of the job if the contractor knows what he or she is doing and knows what the customer wants then the lack of specifications is probably a good thing.Concrete slab design the concrete slab must be designed to resist the punching shear and weight of the pallet racks. This is too high for the application. As this surface does not generally affect the overall heat load this design guide assumes a 4 10 cm layer of concrete. Freezer floors require a number of specific plans so that the freezer floor never suffers frost heave which can destroy not only the freezer floor but can actually go on to destroy the entire building that the freezer is housed within.
What are the key design elements of a freezer floor. An atypical concrete job concrete curing in freezers is a unique experience.
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