Paper, Plastics, Paints, and Coatings
Calcium carbonate is the most widely used mineral in the paper, plastics, paints, and coatings industries, both as a filler – and due to its special white color – as a coating pigment. As an extender, calcium carbonate can represent as much as 30% by weight in paints. Calcium carbonate is also used widely as a filler in adhesives and sealants.
Personal Health and Food Production
Calcium carbonate is widely used as an effective dietary calcium supplement, antacid, phosphate binder, or base material for medicinal tablets. It also is found on many grocery store shelves in products such as baking powder, toothpaste, dry-mix dessert mixes, dough, and wine. Calcium carbonate is the active ingredient in agricultural lime and is used in animal feed. Calcium carbonate also benefits the environment through water and waste treatment.
Building Materials and Construction
Calcium carbonate is critical to the construction industry, both as a building material and as an ingredient of cement. It contributes to the making of mortar used in bonding bricks, concrete blocks, stones, roofing shingles, rubber compounds, and tiles. Calcium carbonate decomposes to form carbon dioxide and lime, an important material in making steel, glass, and paper. Because of its antacid properties, calcium carbonate is used in industrial settings to neutralize acidic conditions in both soil and water.