How Much Gravel Under Concrete
How Much Gravel Under Concrete. Layer of compacted gravel under the new concrete. Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete.
It depends on what it is for and how much weight it will have on it. How much gravel do you put under concrete? How much gravel do you put under concrete?
How Much Gravel Do You Put Under Concrete?
One part cement, two parts sand, and three parts gravel make up an average 1:2:3 mix. I have a lot of this gravel, and also unsorted sand, so i'm hoping one of those options are ok to use? The gravel base for a driveway should be a minimum of 4 inches deep.
You Need Two Parts Of Sand And Three Parts Of Gravel (2:3) In A Yard Of Concrete.
Compare that to the tensile strength of grade 60 rebar, which is 60,000 psi. Footing should bear upon undisturbed virgin soil. Any more depth of gravel is ok with the proviso that it be well compacted.
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.
Can i use 3/4 (crushed/angular) gravel under a concrete pad? Let's say it's d = 2 yd. Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete.
In Any Case You Want To Use Something That Will Compact Like Crusher Run And Not Just Gravel.
I'll pour 6 concrete over 6 of ??. One part cement, two parts sand, and three parts gravel make up an average 1:2:3 mix. Poor soil or a sloped driveway may also require deeper gravel.
It Depends On What It Is For And How Much Weight It Will Have On It.
The volume of gravel required is equal to the volume of excavation. Multiply the length by the width by the depth to see how. For something like garage 8 of compacted stone and 4 of reinforced concrete would be a minimum and 12 or stone and 6 of concrete would hold just about anything.
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