Structure of reinforced cementitious material and process of making the same structure by a three-dimensional printing process

A process of making a structure of reinforced cementitious material comprising the following steps:

• making, by a three-dimensional printing process, a plurality of modules of cementitious material, said three-dimensional printing process comprising a step of depositing a plurality of layers of cementitious material one on another according to a stratification direction, said plurality of modules comprising:
• at least one first module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of said outer lateral surface of the first module defining a reciprocal coupling surface, said first module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, and
• at least one second module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of the outer surface of the second module defining a reciprocal coupling surface countershaped to the reciprocal coupling surface of the outer surface of the first module, said second module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction;
• bringing in contact the first and second modules so that respective coupling reciprocal surfaces of the first and second modules abut on each other;
• following the step of contacting the first and second modules, engaging at least one connecting element, on one side, inside the cavity of the hooking portion of the first module and, on another side, inside the cavity of the hooking portion of the second module, said connecting element constraining the first and second modules and being configured for holding the first and second modules in contact with each other, wherein the connecting element comprises:
• at least one reinforcing bar extending along a longitudinal development direction between a first and second end portions,
• at the first end portion, a first engagement portion emerging from the reinforcing bar transversally to the longitudinal development direction of the reinforcing bar, and
• at the second end portion, a second engagement portion emerging from the reinforcing bar transversally to the longitudinal development direction of the reinforcing bar,
• wherein the first and second engagement portions of the connecting element are distinct and removably associable to the reinforcing bar,
• engaging the first and second engagement portions in the first and second modules respectively;
• and
• after engaging the first and second engagement portions in the first and second modules, constraining the reinforcing bar to said first and second engagement portions,
• wherein the step of engaging the connecting element to the first and second modules comprises the following sub-steps:
• engaging the first engagement portion inside the cavity of the hooking portion of the first module, and
• engaging the second engagement portion inside the cavity of the hooking portion of the second module.