How to Adhere Concrete to Concrete
Wait until a cool, overcast day to do your concrete repairs., Buy concrete patching material., Sweep the concrete surface carefully., Dust the surface thoroughly after you have swept., Rinse the concrete., Create cement paint., Apply a thin layer of...
Step-by-Step Guide
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Step 1: Wait until a cool
This is the best time to adhere the concrete because it takes longer for the water to dry out, and it has more time to react with the cement. -
Step 2: overcast day to do your concrete repairs.
It is available in a pre-mixed form or by buying the separate ingredients in bulk.
If you haven't adhered concrete to concrete before, it is a good idea to go with the pre-mixed version, which only requires that you add water.
Buying the raw materials, gravel, Portland cement and sand is considerably cheaper than buying pre-mixed concrete patching.
If you are patching a deep hole, you can use 1-inch (2.54-cm) gravel, otherwise, use very fine gravel.
Mix the dry materials in a ratio of 3 parts gravel to 2 parts sand to
1.5 parts cement in a bucket.
This is sometimes listed as 3 to 2 to
1.
A higher amount of cement will create a stronger material.
There will be more of chemical reaction between the cement and water, which will create more crystals and a harder structure. , You must remove all loose stones, or the bonding agent and cement will not reach the surface of the concrete. , You can use a blower or a soft brush; wipe away the dirt that is stuck to the surface. , Sprinkle an even amount of water onto the surface with a hose attachment.
Stop adding water before you create standing water on the surface.
This will stop the porous concrete from sucking the moisture out of the bonding agent and concrete bonding material. , Mix Portland cement, which is available at most hardware stores, with water.
Stir the 2 ingredients together until they form the consistency of wet paint.
You can also buy an acrylic bonding agent to use in place of the homemade cement paint.
They are made of resin and can be either added to your patching concrete or applied like the cement paint.
Follow the instructions on the can or bottle very carefully, as many of the products have different application instructions and drying times. , Do this right before you plan to pour the new concrete patch onto your old concrete surface. , Mix it well.
Pour the patch into holes and cracks or pour a 3/8-inch (1-cm) layer to flat surfaces. , Apply it to the surface with a back and forth motion until the pieces of gravel have sunk below the surface.
The sand and cement should rise to the surface. , It will evaporate on its own.
For a smoother finish, wait until the concrete is hardening and almost plastic in texture, then apply a smooth back and forth motion with a metal trowel. , This will keep as much water as possible within the concrete mix and it will bond better. , This will keep the chemical reaction going and make the new concrete stronger. -
Step 3: Buy concrete patching material.
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Step 4: Sweep the concrete surface carefully.
-
Step 5: Dust the surface thoroughly after you have swept.
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Step 6: Rinse the concrete.
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Step 7: Create cement paint.
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Step 8: Apply a thin layer of the cement paint to the old
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Step 9: damp concrete with a paint brush.
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Step 10: Add the water to the homemade or pre-mixed concrete patch just before applying.
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Step 11: Wipe the surface of the concrete with a wooden float.
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Step 12: Allow water to bead and rise to the surface.
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Step 13: Cover your patch with plastic sheeting while it dries.
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Step 14: Spray the new concrete with a coat of water every day for 4 to 7 days.
Detailed Guide
This is the best time to adhere the concrete because it takes longer for the water to dry out, and it has more time to react with the cement.
It is available in a pre-mixed form or by buying the separate ingredients in bulk.
If you haven't adhered concrete to concrete before, it is a good idea to go with the pre-mixed version, which only requires that you add water.
Buying the raw materials, gravel, Portland cement and sand is considerably cheaper than buying pre-mixed concrete patching.
If you are patching a deep hole, you can use 1-inch (2.54-cm) gravel, otherwise, use very fine gravel.
Mix the dry materials in a ratio of 3 parts gravel to 2 parts sand to
1.5 parts cement in a bucket.
This is sometimes listed as 3 to 2 to
1.
A higher amount of cement will create a stronger material.
There will be more of chemical reaction between the cement and water, which will create more crystals and a harder structure. , You must remove all loose stones, or the bonding agent and cement will not reach the surface of the concrete. , You can use a blower or a soft brush; wipe away the dirt that is stuck to the surface. , Sprinkle an even amount of water onto the surface with a hose attachment.
Stop adding water before you create standing water on the surface.
This will stop the porous concrete from sucking the moisture out of the bonding agent and concrete bonding material. , Mix Portland cement, which is available at most hardware stores, with water.
Stir the 2 ingredients together until they form the consistency of wet paint.
You can also buy an acrylic bonding agent to use in place of the homemade cement paint.
They are made of resin and can be either added to your patching concrete or applied like the cement paint.
Follow the instructions on the can or bottle very carefully, as many of the products have different application instructions and drying times. , Do this right before you plan to pour the new concrete patch onto your old concrete surface. , Mix it well.
Pour the patch into holes and cracks or pour a 3/8-inch (1-cm) layer to flat surfaces. , Apply it to the surface with a back and forth motion until the pieces of gravel have sunk below the surface.
The sand and cement should rise to the surface. , It will evaporate on its own.
For a smoother finish, wait until the concrete is hardening and almost plastic in texture, then apply a smooth back and forth motion with a metal trowel. , This will keep as much water as possible within the concrete mix and it will bond better. , This will keep the chemical reaction going and make the new concrete stronger.
About the Author
Karen Murphy
Experienced content creator specializing in cooking guides and tutorials.
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