论文信息 - Micro-cable reinforced geopolymer composite for extrusion-based 3D printing

Micro-cable reinforced geopolymer composite for extrusion-based 3D printing

Abstract Geopolymer has been applied to accommodate the rapid development of 3D printing in civil engineering practices and contributed this technique to reach its maximum eco-friendly potentials by eliminating the use of Portland cement. However, inherent problems with 3D printing concrete lie in the low tensile strength and poor ductility due to non-reinforcement, which greatly limit the application of 3D printing materials and structures. Hence, this study experimentally explores the feasibility of directly entraining a continuous micro steel cable (1.2 mm) during filaments (12 mm) deposition process, forming a reinforced geopolymer composite material. Three different printing path configurations are deigned to verify the applicability of micro-cable reinforced geopolymer composite for extrusion-based 3D printing. Flexural bending capacities of the proposed composite is measured and evaluated through four-point bending test. The results prove the well bonding and coordination of the micro-cable and geopolymer. Significant improvement of mechanical strength, toughness and post-cracking deformation of geopolymer composite are demonstrated.

[1] Guowei Ma,et al. Mechanical characterization of 3D printed anisotropic cementitious material by the electromechanical transducer , 2018, Smart Materials and Structures.

[2] G. Corder,et al. Costs and carbon emissions for geopolymer pastes in comparison to ordinary portland cement , 2011 .

[3] G. Ma,et al. Printable properties of cementitious material containing copper tailings for extrusion based 3D printing , 2018 .

[4] Jürgen Groll,et al. Fiber reinforcement during 3D printing , 2015 .

[5] Ming Jen Tan,et al. Anisotropic mechanical performance of 3D printed fiber reinforced sustainable construction material , 2017 .

[6] Viktor Mechtcherine,et al. 3D-printed steel reinforcement for digital concrete construction – Manufacture, mechanical properties and bond behaviour , 2018, Construction and Building Materials.

[7] Yang Ju,et al. State-of-the-art of 3D printing technology of cementitious material—An emerging technique for construction , 2017, Science China Technological Sciences.