Who invented cementite?

Cement:Powdered water-hard inorganic cementitious material. Mixed with water to form a slurry, it can harden in air or in water, and can firmly cement sand, stone and other materials together.

Early mixtures of lime and volcanic ash were very similar to modern lime-volcanic ash cements, and concrete made from it cemented to crushed stone was not only stronger when hardened, but also resistant to erosion by fresh or salt-laden water.

For a long time, it has been widely used as an important cementing material in civil engineering, water conservancy, national defense and other projects.