How Much Concrete For Slab?

How much concrete do I need for a 10×12 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.

Can I 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 much concrete do I need for a 30×30 slab?

Concrete Slab Prices By Size

Slab Size Square Feet Average Cost Installed
20×30 600 $3,702
30×30 900 $5,553
30×40 1200 $7,404
40×60 2400 $14,808

How much does a 20×30 concrete slab cost?

Concrete Slab Cost Calculator

Size (in feet) Approximate Cost
20×20 $2,400
24×24 $3,460
20×30 $3,600
25×25 $3,750
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How many yards of concrete do I need for a 10×10 slab?

10 x 10 = 100 square feet. 4 ÷ 12 =.33. 100 x.33 = 33 cubic feet. 33 x.037 = 1.22 cubic yards.

How many 80lb bags of concrete makes a yard?

If you’re using 80lb bags of concrete, you’ll need 45 bags to make a yard.

Do you need rebar for 4-inch slab?

No, you do not need rebar for a 4inch slab of concrete on grade. A 4inch-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.

Do you need rebar for 2 inch slab?

Rebar should have a minimum 2″ embedment in the concrete. 2″ of concrete from the outside of the rebar to the surface. If your slab is going to be subjected to enough load to need rebar it will also need to be thicker; 6″ or 8″. depending on your engineer’s design.

How strong is 2 inches of concrete?

How strong is 2 inches of concrete? A common bag of concrete, for example, may have a compression strength of 4,000 psi, based on a thickness of 2 inches after it has set for 28 days. Other concrete may have a compression strength of only 550 psi.

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.

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How thick does a concrete slab need to be for a garage?

The concrete slab should be four-inches thick at least; it needs to be thicker if heavy equipment will rest on it. Building codes offer requirements for the concrete mix, which vary by region. The standards are expressed in terms of “compressive strength,” which boils down to the amount of water used in the mix.

Is gravel needed 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.

Is it cheaper to pour concrete yourself?

One of the least expensive ways to get concrete is to mix your own. You can buy bags of the mix from a home improvement store. Typically, you only have to add water for it to be ready to pour. Otherwise, you risk getting a weaker concrete once it cures, which could lead to cracks or crumbles within a couple of years.

How much does a 30 by 30 garage cost?

At an average cost of $49 per square foot to build a garage, a 30 by 30 garage is priced at around $29,400. Your final price will depend on the finishes, and if you decide to add plumbing, lighting, or HVAC.

How much does a 30×30 garage cost?

If you’re looking for something to save money with a simpler, more economical garage, 30×30 carport cost estimates are typically from $3,745 to $4,345, depending on the style, including 6-foot legs and a carport roof.

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