Development of a calcium sulfoaluminate-Portland cement binary system for twin-pipe 3D concrete printing

Tao, Yaxin; Mohan, M.; Rahul, A.V.; Schutter, Geert De; Tittelboom, Kim Van

doi:10.1016/j.cemconcomp.2023.104960

Cited by 15 publications

(1 citation statement)

References 59 publications

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“…Because pure limestone powder cannot react with water, limestone-powder-based striations become weak zones that reduce the overall mechanical strength of the 3D-printed element. A new system using a binary binder was proposed with Portland cement and calcium sulfoaluminate (CSA) cement in the two constituent mixtures [23,34]. CSA cement, a hydraulic binder rich in ye'elimite, offers numerous advantages, including reduced carbon emissions and the potential for rapid hardening.…”

Section: Stiffening Control Of 3d Printable Concretementioning

confidence: 99%

3D concrete printing for tunnel linings: Opportunities and challenges

Tao,

Yuan

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The use of shotcrete for hard rock tunnel linings has drawbacks such as irregular surfaces and rebounds. By contrast, extrusion-based 3D concrete printing presents a promising solution with precise deposition and reduced rebound. This study discusses the potential of 3D printing for tunnel linings, focusing on mitigating shear failure and addressing interfacial detachment. Achieving high strength early for stable adhesion to rock surfaces is paramount for countering shear failure. A twin-pipe pumping system was introduced utilizing a helical static mixer to blend concrete involving chemical triggers, effectively managing the stiffness and fluidity during pumping. In addition, the adhesion to the substrate must be addressed. Based on the above discussion, this study offers insights into the fundamental challenges, paving the way for advancing extrusion-based 3D concrete printing for tunnel linings.

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Section: Stiffening Control Of 3d Printable Concretementioning

confidence: 99%