Cracking on slab
Cracking on slab
(OP)
Dear all
What reason for this cracking after casting concrete? (Attachment file)
What solution for cracking ?
Thank you 🙏
What reason for this cracking after casting concrete? (Attachment file)
What solution for cracking ?
Thank you 🙏

RE: Cracking on slab
RE: Cracking on slab
hokie66 also gives you good advice as to what you can do about....maybe nothing needs to be done, depending on the use of the floor slab. If the slab will have forklift traffic on it or similar abrasive use, you will see a reduction in durability of the surface over time. Depending on the strength of the concrete and the severity of use, that can show up in the first year or can take several years to manifest.
One possibility to alleviate some of that is to use a surface hardener (calcium or sodium silicate based) after the concrete has adequately cured. This material will expand into the pores of the concrete and provide a bit better durability. You have to be a bit careful with its use though, particularly if you have a lot of moisture vapor migration through the slab. You can end up with a "soda ash" mess on the surface if the conditions are not proper.
Kudos for attempting proper curing with wet burlap.