Design of Eco-Efficient ¿Concrete¿ for Digital Fabrication

• Type: Chapter or Part of a Book
• Date: 2026

Authors

Ana Mafalda Matos (Author) FEUP; Mariana Fonseca (Author) FEUP; Paula Milheiro de Oliveira (Author) FEUP; Mário Jorge Pimentel (Author) FEUP

Book

Title: Proceedings of the RILEM Spring Convention and Conference 2025

Pages: 136-144

ISBN: 978-3-032-14165-1

Electronic ISBN: 978-3-032-14166-8

Indexing

Scopus

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering > Concrete engineering

FOS: Engineering and technology > Civil engineering

Associated Projects

DigiCrete - NEXT GENERATION OF DIGITAL "CONCRETE": performance mix design and assessment of sustainable and circular cementitious composites

Other information

Authenticus ID: P-01A-Y2S

DOI: 10.1007/978-3-032-14166-8_13

Abstract (EN): The development of cementitious materials for 3D printing (3DPC) still presents many material and structural challenges, as well as ecological fragilities. 3DPC formulations require a high amount of cement and SCM to achieve rheological properties that meet printing requirements. Therefore, it is imperative to study alternative materials and (partial) substitutes for Portland cement to reduce the carbon footprint of 3DPC, particularly in the long-term vision. The use of locally available SCM reduces the costs and carbon dioxide (CO2) emissions associated with the production of 3DPC, while at the same time adding value to local and abundant industrial waste or by-products. As part of the DigiCrete Project, this study aimed to study potential ternary mixtures for 3D printing using national materials, including waste glass powder. At the first stage, paste, fresh state, hardening, mechanical properties, and carbon efficiency were studied. Using a centered factorial plan, the influence of the main variables of the mixture on the properties of 3DPC was evaluated, and the main effects of the mixture factors on the responses and possible interactions were identified. This knowledge can facilitate protocols for optimizing 3DPC compositions. The potential and optimized mixtures at the paste level went on to be studied at the mortar level. The results showed that it is possible to correlate results from traditional tests (spreading, slumping) in the study of mortars and parameters from the study of pastes and establish a printable mortar. Finally, it was possible to conclude that using local materials, including the industrial waste studied, is viable for the 3D printing of cementitious materials.The development of cementitious materials for 3D printing (3DPC) still presents many material and structural challenges, as well as ecological fragilities. 3DPC formulations require a high amount of cement and SCM to achieve rheological properties that meet printing requirements. Therefore, it is imperative to study alternative materials and (partial) substitutes for Portland cement to reduce the carbon footprint of 3DPC, particularly in the long-term vision. The use of locally available SCM reduces the costs and carbon dioxide (CO2) emissions associated with the production of 3DPC, while at the same time adding value to local and abundant industrial waste or by-products. As part of the DigiCrete Project, this study aimed to study potential ternary mixtures for 3D printing using national materials, including waste glass powder. At the first stage, paste, fresh state, hardening, mechanical properties, and carbon efficiency were studied. Using a centered factorial plan, the influence of the main variables of the mixture on the properties of 3DPC was evaluated, and the main effects of the mixture factors on the responses and possible interactions were identified. This knowledge can facilitate protocols for optimizing 3DPC compositions. The potential and optimized mixtures at the paste level went on to be studied at the mortar level. The results showed that it is possible to correlate results from traditional tests (spreading, slumping) in the study of mortars and parameters from the study of pastes and establish a printable mortar. Finally, it was possible to conclude that using local materials, including the industrial waste studied, is viable for the 3D printing of cementitious materials.

Language: English

Type (Professor's evaluation): Scientific