#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

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