Open AccessFRESH PROPERTIES AND MIX DESIGN FOR 3D-PRINTABLE DECORATIVE CONCRETE
Author(s) -
Galina Slavcheva,
E. A. Britvina,
M. A. Shvedova
Publication year - 2021
Publication title -
russian journal of building construction and architecture
Language(s) - English
Resource type - Journals
ISSN - 2542-0526
DOI - 10.36622/vstu.2021.52.4.007
Subject(s) - materials science , rheology , casting , composite material , cement , plasticity , viscosity , 3d printing , yield (engineering) , deformation (meteorology)
Statement of the problem. This paper present the rheological properties of 3D-printable decorative concrete. The effects of mix proportion on its plasticity and shape stability are presented together. It has been established that kind of cement changes plasticity of fresh mixtures and its resistance to load during the printing. Results. The fresh mixtures of 3D-printable decorative concrete with effective mix design had plastic yield value Ki 1.0 - 2.2 kPa, structural strength σ0 = 1.5 - 4.5 kPa, value of plastic deformations Δpl = 0.03 - 0.07 mm/mm. That is defined the ability of these mixtures to plastically deform without structure destruction and hold its shape, resist the deformation under compressions load during multi-layer casting.Conclusions. Shape stability of 3D-printable mixture can be changed by 2--3 times by using cement with efficient ranging of a particle size. The plasticity and shape stability of fresh mixtures can be regulated with usage of viscosity modifiers, the type of which depends on the type of cement.