Concrete is essentially what you get when you mix Portland cement, aggregate and water together (in the right proportions) and then let the mix harden. Looking at these different parts -. Portland cement (or just Cement) is basically made by grinding, heating in a kiln, then grinding again, the right kind of rocks.
How many pieces of Holland Stone does it take to do a square foot of paving? It takes approximately 4.6 pieces of Holland Stone to make a square foot of paving. Each pallet has 480 pieces of Holland Stone on it that should cover about 103 square feet of area.
How many bundle of roofing shingles to cover 2800 square feet?   Roofing is sold by the square which is 100 square feet per square and there are 3 buncles per square. A 2800 square foot roof = 28 squares x 3 bundles per square = 8â¦4 bundles. Add about 10% (3-4 bundles) for trim waste. This is pretty accurate for a simple hip roof. A roof with multiple valleys can take a bit more.