The present invention relates to a self-pouring mold system which ensures uniformity of a material by laterally pouring concrete into a mold installed on a side of a wall structure and minimizing a fall head generated when the concrete is poured to prevent bleeding, thereby ensuring uniformity of a fire-proofing material and adjusting a required fire-proofing coating thickness, and a method of fire-proofing, repairing, and reinforcing using the same.

A wall may be formed by a method comprising providing an extrusion platform having a plurality of perforations extending through a surface of the extrusion platform, and extruding a cementitious composite through the perforations of the extrusion platform to grow a plurality of cementitious composite rods each extending from a respective one of the perforations. The method may further comprise allowing the cementitious composite rods to cure to provide the wall.

A wall may be formed by a method comprising providing an extrusion platform having a plurality of perforations extending through a surface of the extrusion platform, and extruding a cementitious composite through the perforations of the extrusion platform to grow a plurality of cementitious composite rods each extending from a respective one of the perforations. The method may further comprise allowing the cementitious composite rods to cure to provide the wall.

A 3D printing system for 3D printing of concrete buildings or other concrete structures. A set of cable support masts are temporarily installed at corners of a two-dimensional footprint area of any given level of a multi-level building to enable 3D printing of wall sections or other structural components of that given level of the building using a cable-guided concrete dispensing nozzle suspended from said cable support masts by a set of movable, motor-driven positioning cables. The building is built in stage-wise fashion, level-by-level, with the set of support masts being moved up level-by-level as the levels of the building are completed. The construction of the building is not dependent on a set of ground-level towers distributed around the ground-level footprint of the building, thus notably reducing equipment requirements for the 3D printed construction of tall, multi-storey buildings.