A device that compensates for abrupt variations in fluid flow rate for a pump line is described. One or more aspects pertain to a system to accomplish automated in-situ placement of a concrete wall or embankment, where a fluid concrete is pumped into place, consolidated, and screeded to a finished surface, with remotely controlled or automated equipment.

A 3D printable clay-based mortar cementitious ink includes a blend of commercially available Type I/II Portland cement, and a fine and coarse silica sand. The ratio of Portland cement to fine sand or fine clay, may be approximately 1.02. The ratio of water-to-binder (Portland cement and SCM) may be approximately 0.55, and the ratio of water-to-powder (binder plus fine clay smaller than 75 microns) can be approximately 0.416. Included with the water and binder/powder mix is an admixture. According to one embodiment, the admixture can include a water reducing admixture, or plasticizer. The fine clay within the aggregate material is unprocessed, and the binder material is approximately 84 to 90 percent cement and 10 to 16 percent SCM. The unprocessed clay, or fine sand, does not undergo any heating, any chemical modification or sifting before being added to the aggregate material.

A method of manufacturing a tower structure includes providing an additive printing device having at least one printer head atop a support surface. The method also includes positioning a pre-fabricated component adjacent to the support surface. The pre-fabricated component is constructed of a composite material reinforced with a plurality of reinforcement members. Further, portions of the plurality of reinforcement members protrude from the composite material. Moreover, the method includes printing and depositing, via the at least one printer head, a cementitious material onto the support surface to build up the tower structure layer by layer around the pre-fabricated component. Thus, the portions of the plurality of reinforcement members that protrude from the composite material reinforce the cementitious material around the pre-fabricated component.

A tower crane includes: a jib provided to extend or retract along the lengthwise direction; a cathead provided to extend or retract in the vertical direction; and a movable balance weight installed under a counter jib to be slidable in the horizontal direction, outwardly moved to be farther away from a mast when the jib is unfolded to have an increased length, and moved toward the mast when the jib retracts to have a decreased length, so that the center of gravity of the tower crane is adjusted according to the length of the jib and thus the balance is adjusted. Moreover, the tower crane comprises a movement guide part installed between the counter jib and the movable balance weight to guide the movement of the movable balance weight in the horizontal direction.

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.

The disclosure relates to an apparatus (1) for applying a hardening building material against a formwork (2) for manufacturing a solid, load-bearing construction (3), for example a wall of a building, having at least one spray nozzle (4) for spraying the building material in a spraying direction (5), a manipulator (6) which guides the at least one spray nozzle (4) and provides the spraying direction (5), wherein the manipulator (6) is mounted on a movable carriage (7), wherein the formwork (2) is formed by a formwork panel (8) which can be moved together with the carriage (7) and is positioned relative to the spray nozzle (4) in the spraying direction (5) and is oriented substantially transversely to the spraying direction (5). The disclosure also relates to a recess formwork system (25), a reinforcement mat (46), a fastening element (51) and a method for manufacturing a solid, load-bearing construction (3), for example a wall of a building, from a hardening building material.

Embodiments of a constructions system for constructing a structure atop a foundation are disclosed. In an embodiment, the construction system includes a rail assembly. The rail assembly is configured to be mounted to the foundation. In addition, the construction system includes a gantry movably disposed on the rail assembly. The gantry is configured to translate along a first axis relative to the rail assembly. Further, the construction system includes a printing assembly movably disposed on the gantry. The printing assembly is configured to translate along a second axis relative to the gantry. The second axis is orthogonal to the first axis. The printing assembly is configured to deposit vertically stacked layers of an extrudable building material onto a top surface of the foundation to construct a structure.

The invention relates to a method of weathervaning a work machine in out-of-operation mode, in particular of weathervaning a revolving crane/revolving tower crane or a concrete spreader mast, wherein the work machine comprises at least one slewing part that is rotatable about a substantially vertical axis by means of a slewing gear, and wherein in a first step one or more wind data are measured by means of a measurement system arranged at the work machine; an optimum position of the slewing part is determined for an optimum weathervaning in dependence on the detected wind data; and the slewing gear drive is subsequently correspondingly actuated to bring the slewing part into the determined position

A large-scale additive manufacturing system for printing a structure includes an extrusion system and a knitting system. The extrusion system includes a nozzle configured to receive a supply of structural material and to selectively dispense the structural material in flowable form, and a first gantry configured to move the nozzle along toolpaths defined according to a structure to be printed such that structural material may be dispensed along the toolpaths to print a series of structural layers, wherein the series of structural layers bond together to form all or a portion of the structure. The knitting system includes a tow feeder configured to feed a supply of tow material to a location proximate a current course of loops extending above an upper surface of a current structural layer or extending above a base surface in regions where no structural layer has been printed, and a hooking device configured to engage the tow material and bring it through the current course of loops to form a subsequent course of loops interwoven with the current course of loops. A controller is configured to operate the knitting system to form additional subsequent courses of loops each interwoven with a current course of loops after each of the series of structural layers are printed, wherein the interwoven courses of loops create a reinforcement network of knitted loops embedded in the structure, and wherein the series of structural layers are tied together.

A method of constructing a tower is provided, the method including the steps of providing an elevation mechanism including a dynamic engaging mechanism realized to engage with a tower surface, arranging a 3D printing device on the elevation means, actuating the dynamic engaging mechanism to effect a vertical elevation of the elevation mechanism, actuating the 3D printing device to deposit an essentially horizontal material layer including at least a tower body region, and repeating the steps to obtain a tower structure. A tower constructed using such a method, and a 3D tower printing apparatus, is also provided.