Isaac Charles Johnson

Isaac Charles Johnson ( born January 28, 1811 in London, † November 29, 1911 ) was the inventor of the clinker.

He was a chemist and began in 1838 as a manager in the cement factory of John Bazley White in Swanscombe. He was asked to mix a cement that could compete by Joseph Aspdin with. After the industrial espionage failed, he undertook their own trials. In 1844, he discovered among the alleged mis fires a material that was too spicy baked and therefore sintered. It was created stone -like cement clinker.

For the production of Portland cement clinker had to be finely ground.

In 1856 he founded his own company IC Johnson & Co., Gateshead -on- Tyne, and later in Greenhithe -on-Thames in Kent.