How Cement Is Made - Portland Cement AssociationHow cement is made and history of Portland Cement. . Bricklayer Joseph Aspdin of Leeds, England first made portland cement early in the 19th century by burning powdered line and clay in his kitchen stove. . After the clinker is cooled, cement plants grind it and mix it with small amounts of gypsum and line.a powder made by grinding and treating line,Multi-Scale Investigation of the Performance of Line in Concretepercentage of line powder added directly to the cement clinker prior to the grinding process. (interground . prepared using each of the four original and the heat-treated line powders in combination with either ... since replacements were made on a mass basis and semi-adiabatic specimens were of a constant.