Large Particle 3D Concrete Printing—A Green and Viable Solution

Autor: Dirk Lowke, Niklas Freund, Inka Mai, Stefan Gantner, Harald Kloft, Leon Brohmann, Norman Hack
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Technology
Materials science
Recycled Aggregates
3D printing
Low Carbon
recycled aggregates
3D concrete printing
Article
ddc:69
low carbon
Complex geometry
particle bed 3D printing
particle bed binding
ddc:691
ddc:6
Veröffentlichung der TU Braunschweig
General Materials Science
Composite material
Particle Bed Binding
Cement
Microscopy
QC120-168.85
Ecology
Large Particles
business.industry
Particle Bed 3d Printing
QH201-278.5
large particles
Additive Manufacturing In Construction
3D Concrete Printing
Engineering (General). Civil engineering (General)
Shotcrete
TK1-9971
Compressive strength
Descriptive and experimental mechanics
Volume fraction
Particle
additive manufacturing in construction
Electrical engineering. Electronics. Nuclear engineering
Publikationsfonds der TU Braunschweig
Mortar
TA1-2040
ecology
business
Zdroj: Materials
Volume 14
Issue 20
Materials, Vol 14, Iss 6125, p 6125 (2021)
Materials 14 (2021) 20, 6125. https://doi.org/10.3390/ ma14206125--Materials (Basel)--http://www.bibliothek.uni-regensburg.de/ezeit/?2487261--http://www.mdpi.com/journal/materials--https://www.ncbi.nlm.nih.gov/pmc/journals/3169/--1996-1944--1996-1944
ISSN: 1996-1944
DOI: 10.3390/ma14206125
Popis: The Large Particle 3D Concrete Printing (LP3DCP) process presented in this paper is based on the particle bed 3D printing method
here, the integration of significantly larger particles (up to 36 mm) for selective binding using the shotcrete technique is presented. In the LP3DCP process, the integration of large particles, i.e., naturally coarse, crushed or recycled aggregates, reduces the cement volume fraction by more than 50% compared to structures conventionally printed with mortar. Hence, with LP3DCP, the global warming potential, the acidification potential and the total non-renewable primary energy of 3D printed structures can be reduced by approximately 30%. Additionally, the increased proportion of aggregates enables higher compressive strengths than without the coarse aggregates, ranging up to 65 MPa. This article presents fundamental material investigations on particle packing and matrix penetration as well as compressive strength tests and geometry studies. The results of this systematic investigation are presented, and the best set is applied to produce a large-scale demonstrator of one cubic meter of size and complex geometry. Moreover, the demonstrator features reinforcement and subtractive surface processing strategies. Further improvements of the LP3DCP technology as well as construction applications and architectural design potentials are discussed thereafter.
Databáze: OpenAIRE
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