5th Apr, 2022
Instituto Peruano de Energía Nuclear
Discussion
Started 17th Mar, 2022
How to Fix Concrete Cracks in Steps?
There is nothing worse for curb appearance than chipped and cracked concrete, particularly in steps. But you don’t have to put up with that blight any longer. By the result of weather changes exerted on an existing construction for prolonged time, it causes contraction and expansion those gradually results concrete steps cracks and break up with time.
Dear researchers, I would like to get expert opinions on how to fix this issue with,
optimum efficiency
low cost
prolonged sustainability .
Your answers are highly welcomed.
Most recent answer
En mi pais, hay material especial para tratar estos casos y otros mas; por ejemplo selladores, alquitranes, y otros.
All replies (5)
18th Mar, 2022
Good day
I think it is important to conduct primarily an assessment (condition assessment, visual inspection, load testing, etc) to identify exactly the origin of the crack). Check if these cracks are dormant or active crack.
Crack in reinforced concrete structure may originate from loading condition (Structural crack), chemical detoriation of concrete (Akali silica reaction, corrosion of rebars, etc), and so forth.
The repair method must be based on assessment report.
Thanks
Remove chipped concrete and any friable material to the fullest extent possible. Remove any corroded rebar back to the point where metal and concrete are solid. Treat remaining corrosion on rebar with a rust stabilising solution and ensure good penetration as far as possible. If you the damage is substantial, you may need to provide a reinforcing key into the existing concrete. This could be retrofitted by drilling holes and fitting a proprietary helical bar system such as Twistfix, which can be hammer drilled into the holes, to provide stubs to connect to any new rebar. Then shutter and refinish with an epoxy mortar which provides added strength for concrete restoration. This may require a primer to bond to the existing concrete. The epoxy mortar is super strong. Depending on what surface finish is appropriate, finishing everything in a nice high build epoxy paint would finish things nicely and provide a durable surface finish. Possible also to buy with grit e.t.c. for non slip properties. Alternatively, a retrofit GRP sheet with embedded grit would provide a high quality protective finish and cover for the underlying concrete.
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