i scraped off all the flaking paint and skim coated the whole area with a mixture of quick-setting hydraulic cement. so far, this solution is working really well, plus being lime based it should breathe somewhat, which seems better than sealing everything in.
Hydraulic cement patches can be painted. Hydraulic cement is generally used for patching water-related cracks and holes in concrete, but it also makes a good patching alternative for any type of cement repair. … However, there are a few preliminary steps to take before a finishing coat of paint can be applied.
Beside this, Will hydraulic cement bond to concrete?
Do Not Use Hydraulic Cement – Disappointed, the homeowner will remove the caulk, chisel out the crack, and fill it with hydraulic cement. However, hydraulic cement has a weak bond with concrete, which is the reason the crack needs an inverted V-groove to hold it in. Additionally, hydraulic cement is very rigid.
Likewise, Will cement adhere to concrete?
Fact: Fresh wet concrete does not normally bond well to existing dry concrete. … There is nothing in basic portland cement that will act as a bonding agent. Portland cement concrete works well in mass and provides great compressive strength but not bond. Concrete is marvelous stuff but in time it will deteriorate.
Also, How do you attach concrete to old concrete?
– Drill 5/8-inch diameter holes six inches deep into the old concrete. …
– Flush the holes with water.
– Inject epoxy into the backs of the holes. …
– Insert 12-inch lengths of rebar into the holes, twisting them to ensure an even coating of epoxy around their circumferences and along their lengths within the holes.
When should hydraulic cement not be used?
But it also has some drawbacks: Once mixed, the hydraulic cement only remains workable for 10 to 15 minutes. Will not work on frozen surfaces or if the temperature will drop dramatically within 48 hours. Avoid using it when the temperature is below 40 degrees Fahrenheit.
17 Related Question Answers Found
What can I use to bond concrete to concrete?
QUIKRETE® Concrete Bonding Adhesive (No. 9902) permanently bonds new concrete, plaster, and stucco to existing concrete, plaster, and stucco. Eliminates the need for roughing the surface before the application.
Can hydraulic cement be used as mortar?
Cement alone is generally used as mortar to “glue” together masonry materials like brick, stone or concrete block. … Only a Surface Patch – If you use hydraulic cement on the inside of a foundation wall, to fill a crack for example, you will be able to apply it only to the surface of the crack.
How do you bond concrete to concrete?
QUIKRETE® Concrete Bonding Adhesive (No. 9902) permanently bonds new concrete, plaster, and stucco to existing concrete, plaster, and stucco. Eliminates the need for roughing the surface before the application.
Is hydraulic cement good for cracks?
First, this type of cement will cure under water, which means that you don’t have to dry out the leak before stopping it. Second, is that hydraulic cement expands as it cures, so it tightens up cracks and seals the gaps around pipes.
Is hydraulic cement stronger than concrete?
Hydraulic Cement is Weak – Cement of any kind, by itself, has little structural strength – that’s why it’s most often combined with sand and aggregate to form concrete, a very strong material. Cement alone is generally used as mortar to “glue” together masonry materials like brick, stone or concrete block.
What is the best bonding agent for concrete?
– Best Overall. Quikrete 1 Gal. Concrete Bonding Adhesive. …
– Best Bang For the Buck. Quikrete 1 Qt. Acrylic Fortifier. …
– Best For Cold Temperatures. SikaLatex 1 Gal. …
– Best For Concrete Blocks. Liquid Nails – LN-905 Landscape Block Adhesive. …
– Best Polyurethane. Loctite PL Premium Polyurethane Construction Adhesive.
Will mortar stick to new concrete?
Concrete slab was the foundation, original tile installation had mortar applied directly to concrete slab. … Concrete, mortar or similar materials are not designed to stick or bond to old surfaces. You will not get any satisfactory results if you simply add new mortar to old. It just doesn’t work.
How do you adhere concrete to concrete?
Will hydraulic cement stick paint?
Hydraulic cement is generally used for patching water-related cracks and holes in concrete, but it also makes a good patching alternative for any type of cement repair. Although the chemical properties are slightly different than genuine cement, it can be painted over just like regular cement.
Does concrete stick to concrete?
QUIKRETE® Concrete Bonding Adhesive is designed to bond new concrete to existing concrete.
How do you get mortar to stick to concrete?
The most effective way to ensure a really good bond is with a scratch coat. This is simply a very wet coat made up by mixing the repair product with water. Mix up a small amount of the repair material to a soupy consistency. You don’t need to measure the water-just turn the stuff into slop.
Can I use hydraulic cement as grout?
Hydraulic-cement grouting is a common method of repairing cracks in concrete that is most often used in dormant cracks. This type of grouting tends to be less expensive than chemical grouts, and is well suited for large volume applications. … This is normally the type of grout preferred for sealing cracks in foundations.
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