facility maintenance. Patch the concrete with a polymer-
modified, silica fume enhanced mortar such as Sika Mono Top
(manufactured by Sika Corporation, Lyndhurst, New Jersey), or
Emaco (manufactured by Master Builders Inc., Cleveland, Ohio).
All loose concrete should be removed and the concrete surface
cleaned and prepared as required by the repair mortar
If the spalling is extensive, if the concrete is
cracked and leaking, or if the reinforcing steel is corroded, a
concrete repair specialist should be consulted. The specialist
is needed to evaluate the cause of the problem and to specify the
appropriate repair. Patching spalled concrete created by
corrosion in the reinforcing will only lead to the patch failing
if the corrosion is not addressed first. Cracks in the concrete
can be effectively repaired only when the cause of the crack is
determined. Otherwise, the crack may just form in another
location next to the repaired crack.