Reinforcement method for 3D concrete printing using paste-coated bar penetrations
作者： Jay Sanjayan , Taylor Marchment
DOI: 10.1016/J.AUTCON.2021.103694
关键词:
摘要: Abstract Reinforcement integration is the largest technological challenge in 3D Concrete Printing. Recent studies of in-process ‘bar penetrations’ into fresh printed layers shows promise as an interlayer reinforcement. The formation induced voids around penetrated bars reduces bond, hindering reinforcing potential. In this study, cement paste-coating during penetration investigated to increase bar bond by void filling. A paste developed with red pigment added allowing visual analysis coverage and embedment. Printed wall sections reinforced without paste-coated are tested 3-point bending compared casted variants. Results show that performed significantly better than non-paste coated bars. Strength ductility comparable variants thereby concluding method effective. hypothesis filling validated through embedment which occurred top 50% penetration. Whereas compaction surrounding concrete bottom region.
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