Title:
Application of Natural and Synthetic Nano-/Micro-Fibers in 3D Printed Cementitious Composites
Author(s):
Al Fahim
Publication:
Web Session
Volume:
ws_F23_Al Fahim.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
With the rapid development of concrete 3D printing for construction projects, it is crucial to produce 3D-printed cementitious composites that meet the required fresh and hardened properties. This study investigates the application of different fibers (Cellulose nanocrystals, Cellulose nanofibers, Glass fiber, and Polyacrylic fibers) that can improve the performance of 3D-printed cementitious composites of ordinary portland cement (OPC), alkali-activated materials (AAMs) and white cement (WC). This work will also determine the optimum dosage required for formulation of sustainable high-performance 3D-printed elements. A suite of experimental techniques will be applied to study the impact of different dosages of these fibers on the hardened properties, mass transport properties, and microstructure of these 3D-printed samples. In addition, a simple experimental method was developed to study the extrusion rheology of these mixtures in order to characterize the fresh properties required for extrusion-based 3D printing of cementitious materials.