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

Guowei Ma, Zhijian Li, Li Wang, Gang Bai

Research output: Contribution to journalArticle

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)144-147
Number of pages4
JournalMaterials Letters
Volume235
DOIs
Publication statusPublished - 15 Jan 2019

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