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Can concrete set under water?
Yes. Water is actually needed for concrete to set and is vital to the curing process. Concrete will set just fine under water. Depending on your specific application (will all of the pour be under water or will it start under water and finish above the water line) you may need to adjust the initial dryness of the mix as well as take more care in the pour. All of the volume of the concrete that is under water shoudl be poured in continuous fashtion. If you must pour in steps, the start of the next pour must be "in" the old pour so as to not leave a water survice between the pours. This "seam" will tend to stay and produce a weaker stucture.
Concrete Sealer?
form_title= Concrete Sealer form_header= Seal all the projects in your home with concrete sealer. What is the sealer for?*= _ [50] How much sealer do you need?*= _ [50] Have you ever used sealer?*= () Yes () No
What kind of licence do you need to pour concrete?
Yes, concrete contractors do need a license, which would be a contracting license. You should always ask them for their license before they begins the job, so they have less of a chance of scamming you.
What concrete footing do you need for a block wall?
metal ones
What do you put between slabs after laying them?
in between existing concrete and the new concrete you need to place an expansion joint in between the two.
Under what condition would a molecule need to be actively transport across a membrane?
A molecule would be actively transported when an equal concentration of solutes exist on either side of the cell membrane.
How much concrete do you need to encase electrical service in under a driveway?
The electrical is down at 36". It should not affect your driveway.
need quote on installed concrete patio?
need quote on installed concrete patio
What is the need for a semi permeable membrane?
we need a semipermeable membrane for a process called osmosis...
What is the formula for calculating how much concrete you need?
Can I repair my own concrete sidewalk?
I need to repair my concrete sidewalk. Is this something I can do myself or do I need to hire someone?
Do vinyl fence posts need to be set in concrete?
yes they need to be set in concrete. depending on your fence, one bag of concrete per post should be enough.
Concrete Contractor?
form_title=Hire a Concrete Contractor form_header=Have a company professionally lay down the concrete at your next project. How many cubic feet of concrete do you need?=_ What is at the site now?=_ Describe the project:=_
How much concrete do I need for a 24x36 meter patio?
Well assuming the depth of concrete is going to be 1 meter you will need 846 cubic meters of concrete.
How do you put concrete on concrete and make it stick?
you need to have a ''keyway''---that is a groove in the base concrete,can be cut in if concrete has set,if not set,oil a 2x4lightly(lightly) & imbed it into the base concrete flush.
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.
How do you repair a leaking pipe that is under concrete?
You will have to remove the concrete above and around the leaking pipe. All or some of the pipe may need to be replaced. If your house was new in the early 1980s, the PVC pipe that was used has been found to be generally faulty.ANS 2 - FIRST - make sure it IS under the concrete. In my experience this hardly ever happens unless the foundation has cracked, or building settled considerably.
