Soil Under Slab - No Crushed Stone Used - Building ... Sep 05, 2010· Normally crushed stone is used under the slab for three reasons: 1. It is easily compacted, hence will form a very strong surface to place concrete on, minimizing the potential for settlement of the concrete. 2. It is highly permeable, hence allows moisture under the concrete to drain away from beneath the slab. 3. Joe's Landscaping Supplies - Crushed Rock & Concrete Sold by the cubic yard, 5/8" Minus Crushed Concrete is almost exactly the same as 5/8" Minus Crushed Rock both in how it looks and its applications. It is used as a top course for driveways, walkways, and compacts down (+ great for potholes too). How to Recycle Concrete | RecycleNation Concrete is a mixture of cement and aggregate that has been crushed to a range of sizes, from very fine to somewhat chunky. When the mixture gets wet, the cement acts as a paste that holds the rock together and creates extremely strong structures. To make concrete, a manufacturer needs to get the correct mix of cement and rock. Crushing concrete into gravel - YouTube Dec 09, 2016· How to Crush Concrete Slabs Into Stone Sized Pieces. If a building is being demolished or renovated, it is likely that a concrete floor slab will need to be broken up.crushing concrete into gravel Crush Concrete Into Gravel. how to .    Read More

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