A facility adapted for coating the inside of a pipe element using a mortar, comprising - a transport device which is suitable for transporting the dry matter of the mortar, the transport device including a transport chamber and a member for transporting the dry matter, arranged in the transport chamber, the transport chamber being provided with a dry matter inlet and a dry matter outlet - a mixing device suitable for mixing the dry matter with liquid matter in order to obtain the mortar, said mixing device having a mixing member and a housing 72 forming a mixing chamber for mixing the dry matter with the liquid matter, the mixing chamber having a dry matter inlet, a liquid matter inlet and a mortar outlet, the dry matter outlet of the transport device leads into the dry matter inlet of the mixing chamber, and the transport member and the mixing member are separate members, the facility including a device for supplying liquid matter suitable for introducing the liquid matter into the dry matter, in particular the device for supplying liquid matter including a device for introducing a first liquid component, in particular the device for supplying liquid matter including furthermore a device for introducing a second liquid component, the facility comprising a projection head adapted to project the mortar, the projection head having a head inlet, in which the mortar outlet emerges, and at least one projection window for the mortar, characterized in that the or each device for introducing the liquid component being adapted to introduce the concerned liquid component into the dry matter in a direction having a component perpendicular to the transport direction of the dry matter or in a direction perpendicular to that transport direction, in that the or each device (42, 44) for introducing a liquid component comprises an introduction canal (100, 108) leading into the mixing chamber at the liquid matter inlet and passing through the wall of the housing. - a transport device which is suitable for transporting the dry matter of the mortar, the transport device including a transport chamber and a member for transporting the dry matter, arranged in the transport chamber, the transport chamber being provided with a dry matter inlet and a dry matter outlet - a mixing device suitable for mixing the dry matter with liquid matter in order to obtain the mortar, said mixing device having a mixing member and a housing 72 forming a mixing chamber for mixing the dry matter with the liquid matter, the mixing chamber having a dry matter inlet, a liquid matter inlet and a mortar outlet, the dry matter outlet of the transport device leads into the dry matter inlet of the mixing chamber, and the transport member and the mixing member are separate members, the facility including a device for supplying liquid matter suitable for introducing the liquid matter into the dry matter, in particular the device for supplying liquid matter including a device for introducing a first liquid component, in particular the device for supplying liquid matter including furthermore a device for introducing a second liquid component, the facility comprising a projection head adapted to project the mortar, the projection head having a head inlet, in which the mortar outlet emerges, and at least one projection window for the mortar, characterized in that the or each device for introducing the liquid component being adapted to introduce the concerned liquid component into the dry matter in a direction having a component perpendicular to the transport direction of the dry matter or in a direction perpendicular to that transport direction, in that the or each device (42, 44) for introducing a liquid component comprises an introduction canal (100, 108) leading into the mixing chamber at the liquid matter inlet and passing through the wall of the housing.