If you were to pour that amount of concrete to make a paving slab ten ... heat to form clinker, a mix of calcium oxide and CO₂. For every ton of ordinary Portland cement made, 0.6-0.9 tons ...

Unlike paving bricks or patio slabs ... You’ll save even more if you mix your own concrete instead of having a ready-mix truck deliver it. Size, situation, time and budget are the main things ...