How much gravel do I need for a concrete slab

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How much gravel is needed for a concrete slab?

26/03/2020  A minimum thickness is 4-6 inches of well compacted gravel should be your target. Any more depth of gravel is ok with the proviso that it be well compacted. Click to see full answer In this regard, do you need to put gravel under concrete?

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Sand and Gravel Calculator Buildbase

Sand and Gravel Calculator Calculate how much sand or gravel you need for your project Buildbase . Please choose a branch to set local stock and prices. Login / Register. £0.00 exVAT. Basket. Recently Added. Basket. Browse Basket; Login Product Categories. Aggregates, Sand Cement. Cement Products; Sand; Aggregates Gravel; Building Sand; Cement Limes; MOT Type 1 Hardcore; Post

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Metric calculator for concrete - cement, sand, gravel etc

Both of these concrete calculators make an allowance for the fact that material losses volume after being mixed to make concrete. Calculator are provided for a general mix and a paving mix, the different ratio of materials are: General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel. Paving mix - 1:3½ cement:all-in ...

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gravel under concrete slab? is it absolutely required ...

02/05/2017  Its about 3.75 cu yards of crete, or like $400 It will cost $100 for gravel to fill in 2", but my crete is still only a little cheaper, and it will be a thinner slab. I could put gravel in, say 2" and 3.5" of concrete over that or just full 5.5" of crete or I could do lot of gravel and a 2" top coat over that with a bunch of steel and fibers,

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Gravel Calculator How much gravel do you need?

19/08/2019  If you are in the middle of building your very own house, you have to check out our concrete slab calculator - it will tell you how many bags of cement you really need! How much gravel do I need? Step one is establishing the volume of gravel needed. It is equal to the volume of an excavation, and you can do

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How much gravel do I need for a concrete slab?

05/01/2020  A hand tamper is sufficient for packing gravel, but a plate compactor makes the job much easier, especially when preparing a large area such as a patio. Excavate the soil to a depth of 8 inches, allowing 4 inches for the gravel base and 4 inches for the concrete slab.

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gravel under concrete slab? is it absolutely required ...

02/05/2017  Its about 3.75 cu yards of crete, or like $400 It will cost $100 for gravel to fill in 2", but my crete is still only a little cheaper, and it will be a thinner slab. I could put gravel in, say 2" and 3.5" of concrete over that or just full 5.5" of crete or I could do lot of gravel and a 2" top coat over that with a bunch of steel and fibers,

Get price

Metric calculator for concrete - cement, sand, gravel etc

Both of these concrete calculators make an allowance for the fact that material losses volume after being mixed to make concrete. Calculator are provided for a general mix and a paving mix, the different ratio of materials are: General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel. Paving mix - 1:3½ cement:all-in ...

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What is the best base for concrete slab?

17/04/2021  Subsequently, question is, How much gravel do I need for concrete slab? Normally you want a base layer of gravel about 4-inches deep. Four inches is one-third of a foot, so multiply the square footage by one-third to find the cubic feet of gravel you need. For a 120-square foot patio that works out to 40-cubic feet of gravel.

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Concrete Calculators - cement, sand, gravel and all-in ...

Two Concrete Calculator are provided for different concrete mixes: General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel. and. Paving mix - 1:3½ cement:all-in ballast or 1:1½:2½ cement:sharp sand:gravel. Comment: If you are wondering how 1:2½:3½ equals 1:5 ("shouldn't it be 1:6" I hear someone say), the answer is ...

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Concrete Calculator Ready Mix Concrete Volume Calculator

Our concrete calculator will help you work out how much concrete you need for your concrete slab, footings, columns, stairs or fence post holes. Choose the shape you require concrete for and get an estimate of how much concrete you need for the project. Call 0800 859 5954. Concrete Calculator; Home; Blog; FAQs; Service Areas . Bedfordshire; Hertfordshire; Milton Keynes; Northamptonshire ...

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Concrete Slab - How to install a slab from start to finish

Compact or roll the gravel in 12" lifts to prevent the slab from sinking. 3. Use a laser level to get the final dirt grade flat. This makes for a uniform slab placement and setting the forms is much easier. Most of the concrete slabs we pour are 6" thick. If someone is building a house or a commercial garage we thicken the edges to 12". Forming the edges of a slab is very important. We use 2x6 ...

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Concrete Mix Ratio and How to Mix Concrete Including a ...

Mixing Concrete - Let DIY Doctor show you how to mix concrete with this Project and Video Tutorial. Explains what sand to cement ratio you need for your Concrete Project. Find out how much cement and aggregate you need to buy using our concrete calculator. A guide on how to mix concrete

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Concrete Mixing Ratios - How To Make Concrete (Cement ...

3000 psi concrete mix ratio. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 517 pounds of cement or (234kg) 1560 pounds of sand or (707kg) 1600 pounds of stone or (725kg) 32 - 34 gallons of water or (132L) This mixing ratio will give you a concrete mix that is strong, durable, and good for most ...

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How Much Cement, Gravel and Sand do I Need? GoodHome IDS

20/01/2021  The basic general concrete purpose is made of 1 part of cement, 2 parts of sand and 3 parts of gravel. Water is added to these ingredients to make a paste filled with gravel. Generally, you do not want to add more water than you need. Too much water makes for the weakness of concrete

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How much sand and gravel do I need for a bag of cement ...

A bag of 40kg cement yields about 0.98 cubic feet volume, regarding this, How much sand and gravel do I need for a bag of 40kg cement, generally you will need about 1.96 cubic feet of sand and 3.92 cubic feet of gravel per 40kg bag of cement by using mix ratio 4 parts gravel to 2 parts sand to 1 parts cement (4:2:1) for 3000 psi or 20 MPa of concrete.

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Concrete Calculators - cement, sand, gravel and all-in ...

Two Concrete Calculator are provided for different concrete mixes: General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel. and. Paving mix - 1:3½ cement:all-in ballast or 1:1½:2½ cement:sharp sand:gravel. Comment: If you are wondering how 1:2½:3½ equals 1:5 ("shouldn't it be 1:6" I hear someone say), the answer is ...

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Concrete Slab - How to install a slab from start to finish

Compact or roll the gravel in 12" lifts to prevent the slab from sinking. 3. Use a laser level to get the final dirt grade flat. This makes for a uniform slab placement and setting the forms is much easier. Most of the concrete slabs we pour are 6" thick. If someone is building a house or a commercial garage we thicken the edges to 12". Forming the edges of a slab is very important. We use 2x6 ...

Get price

Concrete Calculator Ready Mix Concrete Volume Calculator

Our concrete calculator will help you work out how much concrete you need for your concrete slab, footings, columns, stairs or fence post holes. Choose the shape you require concrete for and get an estimate of how much concrete you need for the project. Call 0800 859 5954. Concrete Calculator; Home; Blog; FAQs; Service Areas . Bedfordshire; Hertfordshire; Milton Keynes; Northamptonshire ...

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How much concrete? Screwfix Community Forum

12/05/2010  You require approx 5.5 m3 mixed concrete to place. you require 1-2-4 mix for oversite concrete. As I do not know how they sell aggregates in France I will list your materials as follow, Cement approx1750kg. 70no 25kg bags. Grit sand (concrete sand) approx 3500kg. Stone (gravel) 38mm down to 10mm, approx 6500kg. Or if they sell all in ballast in ...

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Do you need gravel under a concrete slab? - Quora

I agree with David Powers and disagree with a statement made by Michael Dillon. Short answer is “yes” but rather than gravel one should use a material that will suffer compaction such as ABC (aggregate base course), crushed concrete, or even (depe...

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Patio Paving Slab Calculator - How Many Will You Need?

Patio Paving Slab Calculator - How Many Will You Need? Our paving calculator is very simple to use. Input the size of the area you need paved, choose the size of the paving slabs you want – we’ll do the rest! Then select your perfect saving slabs from our range.

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How to Prepare the Ground Before Pouring Concrete Slab ...

Determine the proper depth by establishing the height of the concrete slab. Add 2 inches to the depth for gravel if the soil is normally moist or has a high concentration of clay. Most concrete slabs will sit 1 to 2 inches higher than the dirt and 2 to 3 inches below the surface of the dirt, making the needed depth of the hole 3 to 5 inches.

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compact fill under slab - Do It Right Not Over

The slab could be for an entire home, it might be an exterior patio slab, a front porch slab, a driveway, etc. Concrete is an amazing material, but it has an Achilles heel. CLICK HERE to get FREE FAST BIDS from local concrete slab contractors. Concrete Weakness. Concrete has tremendous compressive strength. This means if you squeeze it, it ...

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