Mechanical Behavior of Printed Strain Hardening Cementitious Composites

Stefan Chaves Figueiredo (Corresponding author), Claudia Romero Rodríguez, Zeeshan Y. Ahmed, Derk H. Bos, Yading Xu, Theo A.M. Salet, Oguzhan Çopuroglu, Erik Schlangen, Freek P. Bos

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Extrusion based additive manufacturing of cementitious materials has demonstrated strong potential to become widely used in the construction industry. However, the use of this technique in practice is conditioned by a feasible solution to implement reinforcement in such automated process.
One of the most successful ductile materials in civil engineering, strain hardening cementitious composites (SHCC) have a high potential to be employed for three-dimensional printing. The match between the tailored brittle matrix and ductility of the fibres enables these composites to develop multiple cracks when loaded under tension. Using previously developed mixtures, this study
investigates the physical and mechanical performance of printed SHCC. The anisotropic behavior of the materials is explored by means of mechanical tests in several directions and micro computed tomography tests. The results demonstrated a composite showing strain hardening behavior in two
directions explained by the fibre orientation found in the printed elements. Moreover, the printing technique used also has guaranteed an enhanced bond in between the printed layers.
Original languageEnglish
Article number2253
Number of pages23
JournalMaterials
Volume13
Issue number10
DOIs
Publication statusPublished - 14 May 2020

Keywords

  • 3D printing
  • Engineered cementitious composites (ECC)
  • Fibre reinforcement
  • Strain hardening cementitious composites (SHCC)

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