#cement.building_material  a building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar
  supertype:  #building_material  material used for constructing buildings
  substance of:  #concrete  #mortar
  subtype:  #hydraulic_cement__hydrauliccement__portlandcement  a cement that hardens under water; made by heating limestone and clay in a kiln and pulverizing the result

No statement uses or specializes #cement.building_material; click here to add one.