Development of a 3D printable mortar with flash-calcined sediment

Jana Daher; Joelle Kleib; Mahfoud Benzerzour; Georges Aouad; Nor-Edine Abriak

doi:10.26168/ajce.40.1.46

Jana Daher Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France
Joelle Kleib Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France
Mahfoud Benzerzour Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France
Georges Aouad Faculty of Engineering, University of Balamand, UOB, Al Koura, Lebanon
Nor-Edine Abriak Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France

DOI: https://doi.org/10.26168/ajce.40.1.46

Keywords: 3D printing, flash-calcined sediment, extrudability, buildability, compressive strength

Abstract

This study investigates the feasibility of using dredged sediment, which is now classified as waste, to partially replace Ordinary Portland Cement (OPC) in concrete 3D printing. The sediment used in this study was thermally treated using the flash calcination method. Mortars with varying flash-calcined sediment percentages (ranging from 0 to 20%) are studied and characterized in both fresh and hardened states. A manual gun device was used to test their printability (extrudability and buildability). The flow table test and the fall cone test were used to assess their workability and structural build-up, respectively. Furthermore, the compressive strength of the mortars was determined after 1, 7, and 28 days. The results show that it is possible to 3D print mortars containing up to 10% flash-calcined sediment while maintaining acceptable extrudability and buildability. Furthermore, no significant decrease in compressive strength was observed when flash-calcined sediment was added to the control mixture.