CROSBY RESTORATION, INC.

Concrete Repair / Replacement

Crosby Restoration's concrete repair technicians will assess your concrete structure by analyzing areas of spalling / deterioration for all possible causes.  Spalls and delaminations are usually the result of internal pressure caused by corroding reinforcing steel.  Spalls are areas where concrete has broken away from the wall.  Small spalls, or pop outs, can occur at edges where re-bar ends terminate near the concrete surface or at other localized areas of shallow concrete cover.  Larger spalls occur near embedments and where long sections of reinforcing steel, with insufficient cover, run parallel to the concrete's surface.

Delaminations are areas where the concrete has not bonded with the reinforcing steel.  The resulting cracks, that run parallel to the surface, are due to corrosion of rebar near the top surface or below embedments.  Delaminations can be detected by tapping the concrete with a hammer.  A hollow sound indicates a delaminated area.

During the inspection our technicians can sample and test the concrete to determine compressive strength, carbonation depth, air content, water-cement ratio, and chloride content.  We also identify existing coatings.  During the visual survey, it is important to find and document all deteriorated areas.  Corrosion-related cracks, delaminations, and spalls are most common.  All previous repairs must be inspected for signs of failure such as rust stains, cracking, delaminations, or displacement.  Repairs usually fail near the edges of the patch or at the adjacent concrete. The condition of existing repairs can provide information about whether to replace remaining patches.  

Crosby Restoration provides its clients with repair options to accommodate any budget.  We can put together a phased maintenance plan that will repair the structure over a longer period of time. 
Concrete repairs are usually prioritized in descending order of importance:

There's often no immediate, cost-effective solution to the problem of poor quality concrete.  Coatings or sealers can be applied to reduce the permeability of the concrete and slow deterioration of the structure.  But more than anything, knowing the quality of the concrete allows you to predict whether further deterioration is likely.  This information provides an indication of the expected life of the structure and helps the owner plan and budget immediate and future repairs.

Regular maintenance of concrete structures is essential to their preservation.  The key to successful maintenance is the combination of thorough inspections and well-designed and implemented repairs.  Crosby Restoration's concrete repair techniques can help preserve an owner's investment, enhance the appearance of the structure, and even add to its value.

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