One major consideration in bulk storage is capacity. Domes store a large volume in a smaller footprint, stacking product deeper and taking up less property at the site. While some customers require three to five warehouses to store product, one dome will likely accommodate the same amount of material in one structure.
The double curvature of a dome lends itself to the ability to build up, rather than out, and that curve provides strength at all points of the structure, even near the apex. The entire interior of a dome, then, can be used to contain product, so a dome will hold store more than a silo of similar diameter and height, especially for products with a low angle of repose like cement and fly ash. In essence, the greater quantity a customer wants to store, the more competitively priced a dome will be.