- 1 How do you prepare the ground for a concrete slab?
- 2 Can I pour my own concrete slab?
- 3 Can you pour concrete directly on dirt?
- 4 How much does it cost to pour a 12×12 concrete slab?
- 5 Do I need gravel under concrete?
- 6 What is the best base for concrete slab?
- 7 Do you need rebar for 4-inch slab?
- 8 Can you pour a 2 inch concrete slab?
- 9 How many bags of concrete do I need for a 10×20 slab?
- 10 Should I put plastic under concrete?
- 11 Is sand a good base for concrete?
- 12 How much does a 20×20 concrete patio cost?
- 13 Is it cheaper to buy premixed concrete?
- 14 What is the difference between a concrete slab and a cement slab?
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.
Can I pour my own concrete slab?
Used for walkways, patios, and floors, concrete slabs are inexpensive to install and durable enough to last for years. When you pour your own concrete slab, you’re giving yourself a design material that is adaptive to all of your needs.
Can you pour concrete directly on dirt?
Long story short, yes you can pour concrete over dirt.
How much does it cost to pour a 12×12 concrete slab?
How much does a 12×12 concrete slab cost? The average cost to pour a 12×12 concrete slab that is 4” thick is between $888 and $1,584, with professional labor and materials included.
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.
What is the best base for concrete slab?
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.
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.
Can you pour a 2 inch concrete slab?
If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.
How many bags of concrete do I need for a 10×20 slab?
A 60-pound bag yields. 017 cubic yards, and an 80-pound bag yields. 022 cubic yards. For a 10 x 10 slab, you would need 77 60-pound bags or 60 80-pound bags.
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.
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.
How much does a 20×20 concrete patio cost?
Cost to Install Concrete Patio by Size
|Size in Feet||Square Footage||Price Range|
|12×14||168||$1,400 – $4,000|
|15×15||225||$1,800 – $5,500|
|16×18||288||$2,300 – $7,200|
|20×20||400||$3,000 – $10,000|
Is it cheaper to buy premixed concrete?
It’s cheaper to do all the prep and buy the concrete premixed and delivered. For example, a 10×20′ slab of 4″ concrete would be a minimum of 2.5-3 yards. Here concrete is about $80/yard (closer to $70), or $240 for the concrete. That same slab would take 223 40-pound bags, or 112 80-pound bags.
What is the difference between a concrete slab and a cement slab?
What is the difference between cement and concrete? Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement.