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Etching of the old concrete with muriatic acid is sometimes done to slightly roughen the surface. There are also commercially available bonding agents available at concrete suppliers and at some home centers.
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How do you increase an existing concrete slabs thickness?
You must form on top of the existing slab and drill in anchors to join the new concrete to the old this is called a cap
Can you put more concrete on top of old concrete?
Yes, if the base is stable the new layer will bond and create a new, fresh surface.An unstable base will give bad results. You should pressure wash the old concrete to get rid of loose and spalling concrete and you should use a bonding agent to serve as a primer to get the new layer to bond well to the old.Obviously, if the new concrete is laid over concrete that is subsiding because of a sinking foundation, the new concrete will crack. You need to stabilize the old concrete before pouring new over it.If you put new over old, it needs to be at least a couple inches thick else it will not cure properly. If you simply want to improve the surface, there are special self-levelling concrete mixes that can be poured thinner and still be strong. Take a look at the link below for a good how-to.
Why should defective concrete be immediately repaired on new or old concrete?
to prevent further damage
How do you build a floor on sloping concrete?
it can be done == you can pour self leveling cement mixture over old concrete but you must first rough up surface of old concrete then put bonding agent then mix self leveling mix very wet so you can pour from high spot and it will run to lower areas . Use wood furring strips ripped at an angle to compensate for the angle in the sloped concrete.
What is the percent increase of 47 to 77?
63.8% % increase = (new-old)/old *100% You divide by the old because that is what you are increasing from % increase = (77-47)/47 *100% = 63.8%
Can you bond concrete to concrete?
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!
Can you pour concrete on a concrete floor with an epoxy coating?
You must remove the old epoxy coating before pouring the new floor, for otherwise there will be no bonding. If the epoxy coating is thin (e.g, paint) then it may be possible to remove it by hand sanding. If it is a thick coating, then sandblasting is probably the best method. In either case, appropriate dustmasks and other safety precautions are essential. Good luck
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
How do you pour concrete on old concrete?
What you need to do first is to check if you have that room near the threshold of the door for that extra concrete(which is minimum of 3.5" inches) then you need to remove the top surface of the old concrete to be rough surface don't break too much just about an 1"wash clean and let it dry and only then to install the new concrete.
What is the percent of increase from 124 to 149?
Formula: % increase=[(new value - old value) / old value] x 100% % increase = (149-124) /124 x 100% = 20.16%
What is the percent of increase if the old price is 0.16 and new price is 0.22?
0.22 is 137.5% of 0.16.The increase is 37.5% .
How old does a wolf have to be to start bonding with pets?
Wolves are recommended to be bought at 10 days old so they can begin bonding with their new family at the right age. Don't wait too long, or it can be hard on the wolf, though certainly not impossible if the wolf is already well socialized beforehand.
