Contents
- 1 Can you pour concrete directly on dirt?
- 2 Do I need gravel under concrete?
- 3 How do you prepare the ground for a concrete slab?
- 4 How long before you can frame on concrete?
- 5 Should I put plastic under concrete?
- 6 Do you need rebar for 4 inch slab?
- 7 What type of gravel is used under concrete?
- 8 Can I use pea gravel under concrete?
- 9 Is quikrete as strong as regular concrete?
- 10 How deep should I dig for a concrete slab?
- 11 Is sand a good base for concrete?
- 12 Do I need rebar in a small concrete pad?
- 13 Can I drive on concrete after 3 days?
- 14 How often should you water new concrete?
- 15 How long is slab stage?
Can you pour concrete directly on dirt?
Long story short, yes you can pour concrete over dirt.
Do I need gravel under concrete?
Whether you pour concrete for a walkway or patio, a strong gravel base is required to prevent the concrete from cracking and shifting. Gravel is especially important in clay soil because it doesn’t drain well, which results in water pooling under the concrete slab and slowly eroding the soil as it finally drains.
How do you prepare the ground for a concrete slab?
Preparation is the most important aspect of pouring a concrete slab.
- Dig the ground down to the proper depth.
- Smooth out the ground with the flat side of a rake so that you have a level surface.
- Tamp the ground with a hand tamper or mechanical tamper.
- Pour 2 inches of small, rounded gravel for additional drainage needs.
How long before you can frame on concrete?
You can start framing on a poured concrete slab about seven days after it’s poured. At this point, a concrete slab will have 70% of its fully cured strength. Poured concrete can take up to 28 days to fully cure.
Should I put plastic under concrete?
Recently, though, research has shown that the old traditional layer of 6-mil Visqueen (polyethylene plastic ) under the slab is seldom effective for two main reasons: Although it may seem water-tight, this grade of material allows a lot of water vapor to pass through.
Do you need rebar for 4 inch slab?
No, you do not need rebar for a 4 – inch slab of concrete on grade. A 4 – inch -thick slab cast on the ground and in permanent contact with it will float and rebar is not required. Rebar is recommended on concrete measuring 5 – 6 inches thick.
What type of gravel is used under concrete?
Most concrete contractors want a mix of coarse and fine aggregate to create a compactable base that is going to be safe for settlement and drainage. Crusher run (a mix of crushed stone and stone dust) is one of the best base materials for concrete flatwork.
Can I use pea gravel under concrete?
If you use pea gravel beneath a patio, take a few simple steps to ensure the stability of the base before setting your surface stones, pavers or bricks. Click to see full answer. It should be ok to pour concrete over your gravel walk although you might want to give the concrete a little more depth along the sides.
Is quikrete as strong as regular concrete?
Quikrete fast setting concrete is just as strong as regular concrete. Concrete gets its strength from a chemical reaction that occurs over time during curing. After it’s had time to cure, which usually take 28 days to complete, Quikrete can reach strengths up to 5000 psi.
How deep should I dig for a concrete slab?
Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete.
Is sand a good base for concrete?
Pour concrete over a solid, well-drained base of sand or gravel over clay and other poorly draining soils to provide even support.
Do I need rebar in a small concrete pad?
Rebar is not necessary for every concrete project. The general rule of thumb is that if you are pouring concrete that is more than 5 inches in depth, you are probably going to want to add in some rebar to help reinforce the entire structure.
Can I drive on concrete after 3 days?
Concrete professionals suggest waiting at least seven days after the crew is finished before parking or driving your personal vehicle(s) on your new concrete. The reason for this is because one week is the time period it takes for your new concrete to achieve 90% of its full potential strength.
How often should you water new concrete?
DO spray new concrete with water. One of the most common methods for curing concrete is to hose it down frequently with water —five to 10 times per day, or as often as you can—for the first seven days. Known as “moist curing,” this allows the moisture in the concrete to evaporate slowly.
How long is slab stage?
Slab Stage Under slab drainage, moisture barrier and Termimesh put in place followed by completion of foundation slab. This stage takes approx. 2 weeks.