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Can you bond concrete to concrete?

Updated: 9/13/2023
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11y ago

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Yes, provided you use a bonding agent.

Unfortunately, the term Bonding Agent is used very loosely! In actuality a "Bonding Agent" winds up being a material placed on the existing concrete [Substrate] in the hope that the mix water in the to be placed material will not be absorbed into the host, thus depriving the placed material from proper hydration because the mix water is being absorbed into the host and not properly reacting with the New material being applied.

This, usually is evidenced by a crack appearing at the interface. Resulting in the loss of bond. Cement slurry, bonding agents and wetting solutions are attempted to prevent this cracking.

The only treatment needed is to waterproof the host concrete!! Very easy to do and demonstrates an immediate waterproofing affect. This allows an overlayment or patch to be applied with no water from the applied material being prematurely absorbed into the host material causing a bond problem and shrinkage cracking at this joint.

Any concrete designed to be applied to an existing concrete must be allowed to properly hydrate and cure to obtain the design strength requirements. If the amount of mix water needed for this complete hydration is sucked out of the mix into the old concrete, it will show a crack and not cure correctly.

A "Bonding Agent" is supposed to prevent this. Several products are manufactured for this use or several old school recipes are available for trial, but it all boils down to waterproofing the concrete.

If you waterproof the host material, you'll see a problem free addition of more concrete!

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Can you pour a concrete slab onto another concrete slab?

No. Concrete won't bond to concrete. It will end up cracking.


What is a concrete reinforcer?

Concrete reinforcer increases the strength of a concrete. It is designed to bond, strengthen, prime and seal concrete cement, plaster, stucco and masonry. It can be used to permanently bond new concrete to old concrete, or other surfaces such as wood, hardboard, brick, ceramic tile, concrete block and metal.It is used to prevent cement and group from cracking.Attach new concrete to old concrete and other surfaces.It can be used inside and outside of the housesSupport for concrete to strong foundation


Why it is need to use high strength concrete in prestressed concrete?

to offer high resistance in tansion,shear and bond


What is the bond stress between PVC and concrete?

From my experience, cast concrete readily separates from industrial gray pvc without requiring any release at all. This does not include cellular concrete, which is very sticky.


Do you need a waterproof membraine if installing floor boards directly onto concrete?

If you understand that concrete is a porous material that absorbs and has moisture in it, you then should also understand that this moisture will move toward the top surface of a concrete floor. This moisture will promote mold growth and will also destroy the bond of of most adhesives. Membrane coatings are prone to failure when this moisture carries alkali in concrete to the surface. You are much better off using a penetrating sealer such as "StableCrete" to waterproof the concrete. This product penetrates to form a solid in the capillary/gel-pore system of a concrete. This stops moisture migration and provides for a superior bond to the concrete.

Related questions

Can you pour a concrete slab onto another concrete slab?

No. Concrete won't bond to concrete. It will end up cracking.


What is a concrete reinforcer?

Concrete reinforcer increases the strength of a concrete. It is designed to bond, strengthen, prime and seal concrete cement, plaster, stucco and masonry. It can be used to permanently bond new concrete to old concrete, or other surfaces such as wood, hardboard, brick, ceramic tile, concrete block and metal.It is used to prevent cement and group from cracking.Attach new concrete to old concrete and other surfaces.It can be used inside and outside of the housesSupport for concrete to strong foundation


Why it is need to use high strength concrete in prestressed concrete?

to offer high resistance in tansion,shear and bond


Is concrete example of covalent bond?

Concrete is a composite construction material composed primarily of aggregate, cement, and water.


What is the bond stress between PVC and concrete?

From my experience, cast concrete readily separates from industrial gray pvc without requiring any release at all. This does not include cellular concrete, which is very sticky.


What has the author Youguang Pan written?

Youguang Pan has written: 'Bond strength of concrete patch repairs'


What has the author Duff Andrew Abrams written?

Duff Andrew Abrams has written: 'Quantities of materials for concrete' -- subject(s): Concrete, Tables 'Effect of curing condition on the wear and strength of concrete' -- subject(s): Concrete 'Tests of bond between concrete and steel' -- subject(s): Reinforced concrete 'Effect of vibration jigging and pressure on fresh concrete' -- subject(s): Concrete 'Test of a 40-foot reinforced concrete highway bridge' -- subject(s): Bridges


What has the author Usha Parvathy written?

Usha Parvathy has written: 'Behaviour of FRP-to-FRP and FRP-to-concrete bond'


Do you need a waterproof membraine if installing floor boards directly onto concrete?

If you understand that concrete is a porous material that absorbs and has moisture in it, you then should also understand that this moisture will move toward the top surface of a concrete floor. This moisture will promote mold growth and will also destroy the bond of of most adhesives. Membrane coatings are prone to failure when this moisture carries alkali in concrete to the surface. You are much better off using a penetrating sealer such as "StableCrete" to waterproof the concrete. This product penetrates to form a solid in the capillary/gel-pore system of a concrete. This stops moisture migration and provides for a superior bond to the concrete.


What has the author Jun Yamazaki written?

Jun Yamazaki has written: 'Shear and moment transfer between reinforced concrete flat plates and columns' -- subject(s): Concrete Columns, Reinforced concrete, Testing 'A comparison of the behavior of post-tensioned prestressed concrete beams with and without bond' -- subject(s): Prestressed concrete beams, Testing


Did 40mm jelly is advicable to fix in wet concrete surface for bonding purpose?

it is depends on the load over the bond area....


What has the author Christopher Ian Middleton written?

Christopher Ian Middleton has written: 'Prestressed concrete with special reference to anchorage and bond'