Journal
JOURNAL OF CLEANER PRODUCTION
Volume 300, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2021.126919
Keywords
Construction 3D printing; Concrete 3D printing; Recycled glass cullets; Fine aggregates; Concrete rheology; Concrete strength
Categories
Funding
- National Research Foundation, Prime Minister's Office, Singapore under its MediumSized Centre funding scheme
- National Additive Manufacturing Innovation Cluster
- Singapore Centre for 3D Printing
- Enviro Sand Pty Ltd
- Chip Eng Seng Corporation Ltd.
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This study investigates the effects of recycled glass cullets as fine aggregates for construction 3D printing materials. The results show that as the content of recycled glass cullets increases, the rheological properties and mechanical properties of the material change accordingly.
This paper studies the effects of recycled glass cullets as fine aggregates for the material in construction 3D printing. A reference material with natural river sand as fine aggregate was used as the control and recycled glass cullet of similar grading was used to replace the natural river sand at 25, 50,75 and 100% by mass. The effects of incorporating the recycled glass on the rheological properties such as the static yield stress, dynamic yield stress and plastic viscosity were studied. 3D printing investigation was also con-ducted on the mixtures to evaluate the materials printability (pumpability and buildability). Mechanical properties such as compressive strength and interlayer bond strength by splitting tensile were also examined. Results show that the static yield stress decreases while the dynamic yield stress and plastic viscosity increases as the recycled glass cullets content increases. The change in rheological properties also affected the printability of the mixtures. In the mechanical properties test, the increase in recycled glass cullets content also reduces the compressive strength and interlayer bond strength of the specimens. (c) 2021 Elsevier Ltd. All rights reserved.
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