How many bags of concrete do I need calculator?
For concrete, the formula for volume is as follows: length x width x thickness. To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield.
How much does an 80lb bag of concrete mix cover?
An 80 pound bag of concrete, 2″ thick, will cover 3.6 square feet.
How much concrete do I need for a 10×10 slab?
The amount you will need for a 10 x 10 slab is 1.3 cubic yards, we always add an extra 10% to allow for any slab depth variations or spills that may occur. This is what your typical concrete contractor in Elk Grove does every day. Another Factor you will have to consider is the type of concrete needed for your project.
How many 80lb bags of concrete do I need for a 10×20 slab?
Regarding this, “how many bags of concrete do I need for a 10×20 slab at 6 inch thick?”, its depend on thickness of slab, at 6 inches thick, generally you will need approximately either 218 bags of 60lb or 168 bags of 80lb (3.70 cubic yards or 100 cubic feet or 2.83 m3) of premixed concrete for a 10×20 slab.
How do I figure out how much concrete I need?
How do I calculate how much concrete I need for a slab?
- Measure the area in feet.
- Multiply length by width, and then by thickness.
- Divide the resulting number by 27 to find cubic yards.
How do you calculate concrete mix?
- Cement Quantity= (Cement Part / Concrete Parts) x Concrete Volume.
- Sand Quantity= (sand Part / Concrete Parts) x Concrete Volume.
- Aggregate Quantity = (sand Part / Concrete Parts) x Concrete Volume.
Is it cheaper to buy bags of concrete?
Cost: Don’t think that mixing concrete from bags is cheaper than getting a delivery. It takes 45 bags of 80-pound Quikrete to mix one yard of concrete. For your 2 yard project, that means you will need 90 bags at 80 pounds apiece. 80# bags cost approximately $4.65 each.
How thick should my concrete be?
How Thick does a Concrete Slab need to be? For residential properties, a concrete slab needs to be at least four inches thick to comply with building codes. An additional two inches are recommended if your concrete will regularly receive heavy loads like motor homes or garbage trucks.
Do you need rebar for a 10×10 concrete slab?
Concrete slabs for most residential purposes don’t require rebar grids smaller than 12”, so it isn’t likely you’ll use too much steel. Concrete needs to surround and encapsulate the steel, so as long there is space for it to flow around the steel, you’re good to go.
Is it cheaper to mix your own concrete?
Whether you’re pouring concrete countertops or a patio out back, it may be cheaper to pour concrete yourself rather than hiring someone. Whether you’ll save much in doing so depends largely on the amount of concrete needed and the amount of time you have to invest in your concrete project.
How many bags of concrete do I need for a 10×10 slab 4 inches thick?
At 4″ thick, for a 10×10 slab, generally, you will need 1.23 cubic yards or 33 cubic feet or either 74- 60lb or 56-80lb bags of premixed concrete.
How much does it cost to pour a 24×24 slab of concrete?
Concrete Slab For Garage Cost
A typical 24×24 garage slab costs between $3,057 and $5,944 with prices ranging from $5.31 to $8.31 per square foot for a 4” reinforced slab of concrete, and $6.83 to $10.32 per square foot for a 6” slab of reinforced concrete.
What area does a bag of cement cover?
A bag or sack of cement is 94 lb (43 kg) in the United States; for other kinds of cement, a quantity is indicated on the bag. 1 bag or sack of Portland cement covers approximately 84 square feet area (8m2) for external wall plastering by using standard cement mortar mix of 1 part of cement to 6 parts of sand.
What is the cost of 1 yd of concrete?
On average, homeowners pay $117 per cubic yard of concrete, with a typical cost range between $104 and $144 per cubic yard.
Does more cement make concrete stronger?
To make the concrete stronger, add more cement or less sand. The closer you bring the ratio to an even one-to-one of sand to cement, the stronger the rating becomes.
What is the meaning of 1 2 4 in concrete?
In mix design the proportion 1: 2:4 means, 1 part of cement is mixed with 2 part of sand and 4 part of coarse aggregate.
Is it cheaper to mix your own concrete or buy ready-mix?
Typically, ready-mix concrete is ideal for large commercial projects. Ready-mix concrete provides better quality and a minimal variation between batches, but the price is relatively higher. The mix is prepared in a plant; as a result, the ratio of the different components is accurate.
Do you have to put gravel under concrete?
You do need gravel under a concrete slab, footing, or patio. Gravel provides a solid foundation for your concrete as it can be compacted. It also improves drainage, preventing water from pooling beneath the concrete.
Do you need rebar for 4-inch slab?
Generally, you do not need rebar for a 4-inch slab. But if one should choose to reinforce their concrete patio, the reinforcement bar they should use should be a size #3, which is 3/8 in diameter. Generally, rebar has an immense impact on concrete.
Is gravel needed under concrete?
Do I need gravel under concrete?
What happens if you don’t put gravel under concrete?
Because concrete is a very porous material, it will absorb any moisture that it contacts. This can cause pooling. Without crushed stone, pooling water will settle under it and erode your slab. Adding a layer of crushed stone will add proper drainage, as well as create a barrier between your slab and the ground.
Is bagged concrete as strong as 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 many bags of quikrete do I need for a 10×10?
At 4 inch thick, for a 10×10 slab, you will need either seventy four 60- pounds or fifty six 80- pounds or 112- 40- pounds bags of concrete. Thus, either 74- 60lb or 56- 80lb or 112- 40lb bags of concrete will be required for a 10×10 slab at 4″ thick.
Is it cheaper to pour your own concrete?
Is it cheaper to pour concrete yourself? Yes. In general, you can save up to 40% or more if you pour a concrete slab yourself. If you decide to mix your own concrete, you can save even more.
To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield.
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Here’s what the math looks like for a 10′ by 10′ concrete patio:
- 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 do I need for a 12×12 slab?
Regarding this, “how much concrete do I need for a 12×12 slab?”, at 4 inches thick, generally you will need approximately 1.76 cubic yards or 47.52 cubic feet or 1.35 m3 (either 104 bags of 60lb or 80 bags of 80lb) of premixed concrete for a 12×12 slab, at 5 inches thick slab, 2.22 cubic yards or 59.90 cubic feet or …
How do I figure how much concrete I need?
Calculating the volume for concrete requires using three dimensions: length times width (which is area) times the height (thickness) or L x W x H. If you are using feet as your standard unit of measurement, this formula will give you the volume of concrete in cubic feet.
How many 80lb bags of concrete make a yard?
45 bag
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. 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.
How many sq ft will a bag of concrete cover?
At 4 inches thick slab, on average, A sack or bag of concrete will cover approximately 1 to 2 square feet. A 80 pound bag of concrete would cover 2 square feet. A 90 pound bag of concrete would cover little more than 2 square feet. A 60 pound bag of concrete would cover 1.5 square feet.
How many sq ft does an 80lb bag of concrete cover?
An 80 pound bag of concrete, 2″ thick, will cover 3.6 square feet. An 80-pound bag of concrete, 4″ thick, will cover 1.8 square feet.
What is the 20 30 40 rule in concrete?
The typical concrete mix is made up of roughly 10% cement, 20% air and water, 30% sand, and 40% gravel. This is called the 10-20-30-40 Rule–though proportions may vary depending on the type of cement and other factors.
How many 80 pound bags of concrete do I need for a 10×10 slab?
How far will a 80lb bag of concrete go?
An 80 pound bag of concrete, 2″ thick, will cover 3.6 square feet. An 80-pound bag of concrete, 4″ thick, will cover 1.8 square feet. An 80 pound bag of concrete, 6″ thick, will cover 1.2 square feet.
Why do you divide concrete by 27?
The reason for dividing by 27 is that there are 3 feet in a yard, so that in a cubic yard there are 3 * 3 * 3 = 27 cubic feet.
Does extra cement make concrete stronger?
You can add more Portland cement to bagged concrete to make it stronger. You can also add hydrated lime. To make the strongest concrete, the sand should be sourced from volcanic lava that has a high silica content.
Do you need rebar for 4 inch slab?
Do you need gravel under concrete?
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 it better to cut expansion joints in concrete?
Joints should be sawed as soon as the concrete will withstand the energy of sawing without raveling or dislodging aggregate particles. For most concrete mixtures, this means sawing should be completed within the first six to 18 hours and never delayed more than 24 hours.
What mix makes the strongest concrete?
We mentioned that the strongest mix consists of one part cement, two parts sand, three parts gravel, and half a part water. This is indeed a recipe for a strong concrete mix, but, depending on your circumstances, you may not need the strongest. It’s also important to note that the ingredients you use make a difference.
What happens if I use too much cement in concrete?
Since major force transfer in a concrete/mortar matrix is from sand-sand interaction, excess cement will turn the mortar very brittle since cement particles cannot transfer normal contact force – they are good at providing shear strength.
Is it cheaper to buy bags of concrete or get a truck?
Cost: Don’t think that mixing concrete from bags is cheaper than getting a delivery. It takes 45 bags of 80-pound Quikrete to mix one yard of concrete. For your 2 yard project, that means you will need 90 bags at 80 pounds apiece.