Printability of concrete mixtures filled by hollow microspheres for 3D-printing in construction

Research article

Александр Сергеевич Иноземцев

Тхань Куй Зыонг

DOI:

https://doi.org/10.18454/mca.2020.19.3

Issue: № 3 (19), 2020

Published:

29.07.2020

PDF

Александр Сергеевич Иноземцев

Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)

Тхань Куй Зыонг

Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)

Abstract

The features of the rheological properties of high-strength lightweight concrete filled by hollow microspheres with an average density of 1400 kg/m3 were investigated in the work. Based on both standardized methods for studying the mobility of concrete mixtures and additional criteria for buildability, it has been established that studied mixtures have high printability in construction. It is shown that the high-strength lightweight concrete mixtures, with varying the concentration of the plasticizer, can keep a volume after extrusion of more than 90 % and have the flow diameter of up to 135 mm. The content of the plasticizer is not more than 1.2 % by weight of the cement provides variability of the intensity of liquefaction.

Keywords:

3D-printing, high-strength lightweight concrete, rheology, thixotropy, extrusion.

Full text is available in pdf only

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