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General Repairs to Concrete Floors & Slabs

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How to patch repair damaged concrete floors and slabs - MATERIALS & TECHNIQUE

REPAIRING HOLES / POTHOLES / ISOLATED DAMAGED AREAS IN CONCRETE FLOORS AND SLABS

Materials and technique for carrying out repairs to concrete floors and slabs that have suffered from general wear and tear, erosion and impact damage. This method will provide a clean, solid / reliable repair. 

Repairing a pot hole in a concrete floor slab

METHOD FOR PATCH REPAIRING CONCRETE

  • Saw cut around the perimeter of the repair area.
  • Break out loose and damaged concrete leaving a sound flat base for repair.
  • Prime the sides and base of the repair area.
  • Whilst the primer is still wet/tacky apply and compact the repair mortar. Allow sufficient time for the repair to gain strength before trafficking.
  • For repair depths of 3-50mm use epoxy resin mortars particularly where chemical resistance is required.
  • For repair depths of 10-100 use cement based mortars where applicable. Spray with water and cover with plastic sheet to reduce shrinkage or spray with a curing compound.

DIAGRAM: Method, tips & tricks for repairing a concrete floor slab pothole

Saw cut
Parent concrete
Damaged concrete
Primer
Concrete repair mortar

MATERIALS FOR PATCH REPAIRING CONCRETE

EPOXY RESIN SYSTEMS

Resuprime Epoxy resin primer

Resupatch Epoxy resin mortar 3-50mm fast set

Resuscreed 50 Epoxy resin mortar 3-100mm normal set

CEMENT BASED SYSTEMS

Patchroc GP

Ultracrete FTC

Emaco T545

Paveroc / Patchroc

Click on product name for data and full application instructions. 

 

if saw cutting is not an option

If saw cutting the concrete is not an option the alternative is to use a material that can be feather-edged to a minimal thickness or excavate the damaged area so that all parts are at least the minimum depth required by the repair material, using hand tools if necessary. In these circumstances it is just as important, or even more important, to follow the guidance on the material's technical data sheet on preparation - make sure there is no loose material, dirt, dust or grease left in the hole; if the data sheet recommends it, saturate the existing concrete with water, ensuring that there is no standing water left in the hole (note this is true for cement-based products BUT NOT usually for resins-based products); and prime the area with the recommended product. The minimum depth / thickness a product can be used at is usually governed by the size of aggregate it contains.

SEE ALSO:

General Concrete Repairs for more general concrete repair products 

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