Title:
Additive Construction of Low Embodied Carbon Concrete: Geopolymer Concrete
Author(s):
Anthony Mackin
Publication:
Web Session
Volume:
ws_S25_AnthonyMackin.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/30/2025
Abstract:
Additive construction provides key benefits over traditional methods; however, conventional concrete production significantly impacts the environment due to carbon emissions from Portland cement. This study explores geopolymer concrete a cement-free alternative made from industrial by-products activated by alkali activators, for additive construction. The research focuses on: (1) developing geopolymer mixtures for additive construction, (2) establishing a reliable 3D printing process, and (3) demonstrating the printability of 3D printed geopolymer structures. Results show that the mixtures enabled successful printing of complex forms like circular paths, slopes, and varying cross-sections, proving their suitability. Additionally, findings indicate that increasing slag content enhances compressive strength, controlling the temperature of the alkaline activator optimizes setting time and printability, and allowing idle time before printing helps achieve a printable consistency.