For a 4-inch slab, either eight 60-pound or six 80-pound bags are required, while for a 6-inch slab, either 12 60-pound or nine 80-pound bags are necessary.

Also, How thick should a concrete slab be?

Standard concrete floor slab thickness in residential construction is 4 inches. Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks. To prepare the base, cut the ground level to the proper depth to allow for the slab thickness.

Hereof, How many bags of concrete do I need for a 20×20 slab?

How many concrete bags would I need for a 20 ft x 20 ft x 6″ slab? 333 x 80lb Concrete bags.

Also to know How many bags of cement do I need for 1 cubic meter? One cubic meter of concrete is equal to 1.308 cubic yards of concrete. If there are 5 1/2 bags of cement in 1 cubic yard of concrete, there would be 7.2 bags in 1 cubic meter of concrete. These are the 94 pound bags of portland cement or 42.64 kg bags of cement. Join in and write your own page!

How many bags of concrete do I need for 3 yards?

You will need 60 bags of concrete mix to make a cubic yard of concrete. There’s 27 cubic feet of concrete in a yard.

23 Related Questions Answers Found

Can I pour a 3 inch concrete slab?

Here, pouring a concrete slab 4 inches in thickness is fine. While you may choose to reinforce it with rebar, wire mesh should be sufficient. … A 3- to 4-inch slab will work for the floor of a storage or tool shed, workshop, garden shed, or playhouse.

Does a concrete slab need rebar?

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.

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.

How much is 400 sq ft of concrete?

A typical concrete slab will cost between $113 and $126 per cubic yard (27 cubic feet) or

$5.35 to $6.17 per square foot

on average.

Concrete Slab Prices By Size.

Slab Size Square Feet Average Cost Installed
20×20 400
24×24 576 $3,554
20×30 600 $3,702
30×30 900 $5,553

How much is a 20×20 slab of concrete?

Concrete Slab Cost Calculator

Size (in feet) Approximate Cost
12×20 $1,440
24×24 $3,460
20×30 $3,600

How many bags of concrete do I need for 1 yard?

One 80lbs bag of Quikrete Concrete Mix will yield approximately . 60 cu ft. So it will take 45 bag to equal one cubic yard of concrete.

How much sand and cement do I need for 1 cubic meter of concrete?

1 Cubic Meter of Concrete

1m3 of concrete = 150l water + 250kg cement + 700kg sand + 1200kg aggregates.

How much sand and cement do I need for 1m3 of concrete?

Typically, 1m3 of concrete is made up of 350Kg of cement, 700Kg of sand, 1,200Kg of chippings and 150 Litres of water.

How many 50kg bags of cement are there in 1 cubic meter of concrete?

Procedure To Calculate Cement Bags In 1 Cubic Meter:

Weight of 1 bag cement = 50 kg. =0.0347 cum. = 6.25 bags. Note: You can use the same formula for calculating cement for other nominal mixes.

Should you put plastic under concrete?

A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Vapor barriers are used because while fresh concrete is poured wet, it’s not supposed to stay that way. It needs to dry and then stay dry to avoid flooring problems. … This is why a vapor barrier under concrete is essential.

How many bags of concrete makes a yard?

60 cu ft. So it will take 45 bag to equal one cubic yard of concrete. If you have a project over a 1/2 a cubic yard you should consider our Mix On-site Concrete especially if you are hand mixing. You will be one tired puppy if you mix a yard of concrete by hand.

How much will a bag of concrete cover?

One 50-pound bag of Quikrete Fast Setting Concrete Mix yields about . 375 cubic feet. For example, if you need to cover 33.333 cubic feet, using 60-pound bags of concrete, divide 33.333 cubic feet by . 45 cubic feet to get 74.07 total bags of concrete.

Is 2 inches of concrete enough?

A: Concrete is typically applied at a thickness of 2 inches or more, but the thicker it is, the stronger the slab will be. Four inches is most common for a slab. … Products labeled “High Strength Concrete Mix” are ideal for these types of applications.

Can I pour 2 inches of concrete?

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.

Can you pour concrete directly on dirt?

Long story short, yes you can pour concrete over dirt.

Is wire mesh better than rebar?

Considering the support constraint, rebar is undoubtedly stronger than wire mesh. Several constructors consider rebar for domestic jobs. For thicker driveways and locations that involve greater traffic, rebar is always a good option to consider.

Does 4-inch concrete need rebar?

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.

Do you need wire mesh for 4-inch slab?

No, they do not. Larger projects or slabs may need steel reinforcement to provide support or extra strength. Wired mesh can also help resist cracking. However, not every piece of concrete necessarily requires that extra boost.

How many inches of gravel do you need for a concrete slab?

How Much Gravel Do You Put Under a Concrete Slab? You will need 3 inches of gravel under a concrete slab that is 4 inches thick. More gravel is better, but 3 inches is the minimum amount of gravel you should have with a 4” slab. Use ¾” washed and screened gravel, then compact it to level.