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What size aggregate should be used to make the concrete for a 4 inch slab?

1/4 inch crushed stone
3/8 inch crushed stone
1/2 inch crushed stone
5/8 inch crushed stone
3/4 inch crushed stone
7/8 inch crushed stone
1 inch crushed stone
Not sure
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Question: What size aggregate should be used to make the concrete for a 4 inch slab?
Top Answer (30% of 26 votes): 3/4 inch crushed stone.

Answer: 3/4 inch crushed stone
Explanation: gravel as large as 1-1/2 inches should give you no trouble, and large aggregate is actually a good thing to have. For one thing, it helps reduce shrinkage. A lot of shrinkage happens when water evaporates out of the cement paste - which means the more stone and sand there is, the less overall shrinkage. Also, large chunks of gravel interlock against each other, which helps restrain shrinkage.
Colorado Concrete
Answer: 5/8 inch crushed stone
Explanation: 5/8 or 1/2 is recommmended
Answer: 3/8 inch crushed stone
Explanation: This varies depending on manufacturer usually 3/8-1 1/2"
Black Dirt Services LLC
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