Title:
Investigating Mechanical Properties of 3D-Printed Engineered Cementitious Composites with Ultra-High Tensile Strain Capacity
Author(s):
Amir Bakhshi
Publication:
Web Session
Volume:
ws_S23_AmirBakshi.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
4/2/2023
Abstract:
Engineered cementitious composite (ECC) with high ductility capacity is a promising material for 3D concrete printing (3DCP) applications. The area of significance is how to make this material 3D-printable with acceptable quality. This presentation is part of research on the 3D printing of ECC and investigated the mechanical performance of four novel 3D-printable ECC designed and checked for all printability tests in the previous phases of the project. The effect of different variables on the mechanical properties of ECC, including content and types of fibers (Polyvinyl alcohol (PVA) and Polyethylene (PE), and type of mineral admixtures (slag, fly ash, silica fume, and metakaolin) were studied in detail. The results of flexural tests of 3D-printed beams and direct tension tests of dogbone specimens indicated that ECC samples containing PE fibers could achieve ultra-high ductility with a strain capacity of over 10% with an optimized mixing procedure and viscosity modifier addition.