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THE ROLE OF VARIOUS AGGREGATES ON RHEOLOGY OF FRESH 3D PRINTING CONCRETE



Author(s): Martin Boháč (1), Bohdan Nešpor (1), Theodor Staněk (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 843-848
Total Pages: 6
Language : English


Abstract: The improvement of rheological properties of fresh 3D printing concrete by partial replacement of fine aggregate by fine recycled concrete was studied. The fineness and shape of the aggregate and sand content affects the rheological parameters of fresh mixture. Testing on rotational rheometer was carried out using coaxial cylinders. Testing was carried out in flow regime to evaluate shear and time-dependent rheological properties of fresh printing concrete. The role of packing density of various printing concrete mix designs on rheological parameters were discussed. Small addition of recycled concrete can improve rheological parameters of fresh printing concrete. The proper combination of recycled concrete and sand is the key in optimization of flow properties of 3D concrete.


Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00


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