Abstract
In the era of automation and artificial intelligence, the world is changing rapidly under the broad vision of Industry 4.0. In this framework, the building and construction industry is getting significant attention from both academia and industries with the advent of additive manufacturing technology. Additive manufacturing or 3D printing of concrete provides a complete digital solution to conventional construction practice and fosters sustainable, smart, and green building concepts. In this paper, some recent experimental research conducted at the Indian Institute of Technology Guwahati (IITG) on 3D concrete printing is presented. A custom-developed 3D printable cementitious mix was processed, and its rheological properties were measured using flow table and vane shear apparatus. The influence of process parameters such as print speed and extrusion speed on filament quality (shape retention surface finish) was studied using a lab-scale gantry 3D concrete printer. Finally, the letters of IITG were printed to demonstrate the proposed process parameters and mix design are suitable in practice.
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