Influence of the printing direction and age on the mechanical properties of 3D printed concrete

Autor: Cláudia Gonçalves, Behzad Zahabizadeh, Eduardo Pereira, Vitor M. C. F. Cunha, João Pereira
Rok vydání: 2021
Předmět:
Zdroj: Materials and Structures. 54
ISSN: 1871-6873
1359-5997
DOI: 10.1617/s11527-021-01660-7
Popis: 3D concrete printing (3DCP) technology through wet extrusion was developed as one of the digitized approaches with the aim of enhancing the conventional construction methods. Investigation of mechanical/structural behaviour of printed elements is one of the critical aspects regarding the use of 3DCP. A comprehensive experimental programme was performed to evaluate the behaviour under compressive and flexural loading, at distinct ages and under different loading orientations regarding the printing direction, as well as the quality of printed specimens in addition to the degree of their anisotropic/orthotropic. During the compressive tests, a digital image correlation analysis was also performed to assess the crack initiation and propagation within concrete printed specimens. The results unveiled an adequate quality of the printed specimens based on the mechanical tests performed, which was also corroborated by some physical properties, namely through the specific weight and porosity, in which the differences between the printed and mould cast series were marginal.
Databáze: OpenAIRE
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