You have really two choices, You can make a mix of sand, portland cement, and some latex paint as bonder and then take a trowel and force that into the crack. That will eventually form a hairline crack, due to expansion. If that is acceptable to you then fine.
Otherwise you need a flexible material to compensate for the expansion at the joint. Make a mix of sand and RTV silicone sealant from a Caulk gun into a cup and stirr it well, then take that mix and trowel that tightly into the crack. It will expand and contract well and if properly done, it will be level and last for years.Some cracks are on the top of my garage concrete slab. How to repair %26amp; what material is good for another layer
no matter what you do to fill these cracks its going to look a lot worse than the cracks themselves unless you are going to paint it when you are done. for large cracks cement , fine sand and water , mix it very stiff and force it in the cracks, if the cracks are small leave them , the only way to do the small cracks is to open them up with a masonry blade on a grinder and then fill them...you could top the whole floor with a product like ardex but probably wont hold up for long. if the floor is really bad, tear it out...
Repair the cracks with concrete crack filler, for wide cracks try hydraulic cement. You can paint the floor with epoxy floor paints made specifically for garages.
If its just cracks in conc. (which happens in all conc) just use an elastomeric compound (similar to a caulk) that is designed for concrete adhesion if they are small. If the cracks are quite large, 1/4'; or bigger, use a conc. mix in the gap. That will all the slab the expand and contract a bit but keep water out. If the conc. top is spalling off....(top flakes off and you see the aggregate) all you can you is pour a 2'; skimcoat on top or replace it. If the conc. is spalling...its usually an installation problem...snow/ice removal salt will do it to.
Fill them with powdered Portland or mortar mix(depending on the sise of the crack) dry do not add water the dust will settle in and collect enough moisture to harden with time. add more powder as needed.
No comments:
Post a Comment