3D printing of Portland cement-containing bodies. Issue 2 (25th August 2021)

• Record Type: Journal Article
• Authors: Ur Rehman, Asif; Sglavo, Vincenzo M.
• Is Part Of: Rapid prototyping journal. Volume 28:Issue 2(2022)
• Page Start: 197
• Page End: 203
• Publication Date: 2021-08-25
• Subjects: 3D printing -- Layer thickness -- Mechanical strength -- Dimensional accuracy -- Density -- Binder saturation; Engineering design -- Periodicals; 620.004205
• DOI: 10.1108/RPJ-08-2020-0195
• Languages: English
• ISSNs: 1355-2546

Abstract

Abstract : Purpose: Recent advances in 3D printing construction elements have focused on ordinary Portland cement (OPC) concrete using polymeric binders; herein, this study aims to produce the same using pure water. Design/methodology/approach: A binder jet printer prototype was used to fabricate specimens that are used to assess geometric and mechanical properties. Two distinct water-based binder formulations, compatible with OPC chemistry and piezoelectric jetting device, were used: pure water and water-polyvinyl alcohol (98:2 w/w) solution. Findings: This study examines the effect of binder flow rate on dimensional accuracy. Furthermore, the changes in the mechanical properties over time with hydration have been investigated. Practical implications: Results indicate that the increase in mechanical strength of Portland cement concrete with pure water was consistent; however, it was delayed by the water: PVA (98:2 w/w) solution. Post-curing by water vapor hardened the structure with the removal of layering native to 3DP and decreased infilling porosity by diffusion mechanism. Originality/value: This paper has used pure water jetting for BJT of Portland cement-containing bodies.