
To produce cement, a mixture of lime, silica, alumina, and other mineral ingredients are ground and heated at high temperatures to produce the intermediary product clinker. The production of clinker in the United States has risen consistently over the past decade. When the clinker material is ground and then mixed with gypsum, cement is produced. Concrete is made when cement is mixed with water and coarse aggregates like stone and gravel. In 2021, over 70 percent of the cement used in the United States was for ready-made concrete mixes.