Cracked concrete

Fill concrete cracks, fill joints, fill holes, re-surface

Property Repair Systems - 01626 331351 - where you can speak to concrete people.

 

 
     

Crack Filling - concrete repair with Epoxy Primer and Epoxy Moldable Putty

Concrete Crack Repairs - how to choose a crack repair method and material in brick, stone, render and concrete.

General principle - cut out the cracks with a masonry grinder, or Allsaw, to form square edged slots, and remove all dust and debris

Repair Thickness - the more material that we can put in to the repair, in terms of width and depth, the better it will be able to accommodate natural movements caused by changing temperatures and therefore the better it will last.

Caution - Always consult a Structural Engineer and the building's Insurers before proceeding.


Fine to medium concrete cracks - hairline to 15mm wide.

Cut out to - 15mm to 25mm in width

Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Moldable Epoxy Putty.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Moldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties.

Cut out cracks to a clean slotMixing Mouldable Epoxy Putty Mortar by hand

Slot correctly cut out, square shouldered, dust blown out, ready to Prime and Fill. Mixing.

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Larger holes and cracks in concrete - over 15mm wide

Cut out to - 20mm plus in width - can fill holes of any size.

Pour or inject Structural Epoxy Pouring Resin.

Structural Pouring Resin - available in 1 litre, 2.5 litre and 7.5 litre packs, containing two liquids and a powder.

Pouring Structural Epoxy Resin - paddle mix with an electric drill

Pouring Structural Pouring Resin - 7.5 litre.

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For cosmetic matching of colour or texture - you can add your own Site dust or chippings to the surface, (or ask for our Mortar Colour

Powder), which you can mix into Moldable Epoxy Putty, used as a surfacing finish.

Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Moldable Epoxy Putty.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Moldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties..

Mixing Mouldable Epoxy Putty Moratr

Mixing Moldable Epoxy Putty in the gloved hand.

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Joint Filling - concrete floor to wall joint repair with primer and cementitious filler

Concrete Floor to wall Joint Filling

Cut out the floor to wall joint, in the floor itself, with a masonry grinder or disc cutter, to form a square edged slot and remove all dust and debris. Wet out the slot with fresh water and prime with BondAcryl.

Cut out to - 20mm plus in width - can fill a slot of any size.

Insert a waterproof pointing mix of either Fillet Seal (supplied as a powder) or Bondacryl mixed with sand and cement (no water).

Fillet Seal Powder - available in 25kg packs, or use Bondacryl with your own washed sand and cement - supplied in 2.5, 5.0 and 25 litre bottles.

 

Concrete floor meets brick wall - open damp jointQuarry tile floor meets brick wall - needs 'tanking' below the damp proof course

Typical floor to wall joint problems - cut out the floor edge and fill. May require 'tanking' as well.

Mix up a mortar of 4:1 sharp, washed sand with fresh Portland Cement, using BondAcryl instead of water. Apply the mix to the primed slot and finish flush.

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Concrete Crack Injection - crack stabilisation using injected epoxy resins - injecting hollow patches

Concrete Crack Injection

To treat delamination or hollowness, drill a 5mm - 10mm diameter hole into the crack every 100mm to the depth of the separation between layers. (Hollow area). Inject Epoxy Primer or Thixotropic Injection Resin until it exudes from the next hole. Test for hollowness with a plastic hammer until the delaminated areas cease to sound hollow.

Injecting cracks in concrete using a syringe. Syringes - in 10cc, 20cc and 50cc sizes.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Thixotropic Epoxy Injection Resin - available in 400cc, two pot, gels, with cartridge kit.

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Concrete reinforcement - reinforcement with stainless rods and cementitious mortar

Reinforcing

Rusting reinforcement requires treatment, after full exposure. Give us a call to cost of special rust proofing treatment.

Cut out the cracks with a masonry grinder to form square edged slots and remove all dust and debris. Wet out the slot with fresh water and inject the shrink compensated repair mortar, W60, using the Grout Master plastic applicator. Insert a length of stainless steel helical reinforcement bar, as per our Method Statement (available free, on request). Apply further W60 Grout to fill the crack. Finish using the Finger Trowel. Always consult a Structural Engineer and the building's Insurers before proceeding.

 

Helical Bar fo reinforcing concrete repairs

Stainless Helical Bar

 

Supplied complete as a APRs Crack Filling Kit - Grout Master Applicator, Finger Pointing Trowel, W60 Grout, Mixing Paddle, or the materials and tools can be purchased individually.

Concrete repair kitCutting and filling steps for walls and floors

 

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Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author

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