Indexed In Scopus
  Scopus ID: 21100926589

Potential Application of Flax Fibers in 3D Printed Cementitious Materials

Mengya Li, Said Rahal, Abdelhak Kaci, Abdel-Okash Seibou and Yunyun Tong

Abstract

Due to their low environmental impact and capacity to reduce carbon gas emissions, the incorporation of vegetal fibers in cementitious materials has been increasing. Besides, the building industry shows an upward trend in 3D printing technology due to their fast implementation, affordability, and ability to realize more sophisticated shapes at low cost. The stability of rheological criteria in relation to machine extrusion parameters is important when these composites manufactured by new construction techniques like 3D printing. This call to the understanding of the interaction in term of absorption capacity between the cement and vegetal fibers. In this work, two mixture preparation processes were used. Firstly, the mixture was prepared with dry flax fibers and extra pre-wetting water. However, increased yield stress over time was observed due to the high absorption capacity of dry flax fibers. Secondly, flax fibers were prewetted with a water amount close to their saturation point, 24 h before experiment, to prevent absorption from cement hydration. The morphology of composite was analysed by SEM (Scaning Electron Microscpe). In addition, the mechanical properties were assessed in the hardened state by compressive test and three-point bending test at different curing time. The results found that when the workability of the mixture remained within the desired range, the printing time had no effect the compressive and flexural strengths. The proportion of flax fibers added was insufficient to improve the ductility behaviour of the material.

Published on: September 28, 2023
doi: 10.17756/nwj.2023-s2-059
Citation: Li M, Rahal S, Kaci A, Seibou A, Tong Y. 2023. Potential Application of Flax Fibers in 3D Printed Cementitious Materials. NanoWorld J 9(S2): S350-S355.

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