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A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar

Recently, 3D printing has become one of the most popular additive manufacturing technologies. This technology has been utilised to prototype trial and produced components for various applications, such as fashion, food, automotive, medical, and construction. In recent years, automation also has beco...

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Autores principales: Shakor, Pshtiwan, Nejadi, Shami, Paul, Gavin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567183/
https://www.ncbi.nlm.nih.gov/pubmed/31130708
http://dx.doi.org/10.3390/ma12101708
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author Shakor, Pshtiwan
Nejadi, Shami
Paul, Gavin
author_facet Shakor, Pshtiwan
Nejadi, Shami
Paul, Gavin
author_sort Shakor, Pshtiwan
collection PubMed
description Recently, 3D printing has become one of the most popular additive manufacturing technologies. This technology has been utilised to prototype trial and produced components for various applications, such as fashion, food, automotive, medical, and construction. In recent years, automation also has become increasingly prevalent in the construction field. Extrusion printing is the most successful method to print cementitious materials, but it still faces significant challenges, such as pumpability of materials, buildability, consistency in the materials, flowability, and workability. This paper investigates the properties of 3D printed fibre-reinforced cementitious mortar prisms and members in conjunction with automation to achieve the optimum mechanical strength of printed mortar and to obtain suitable flowability and consistent workability for the mixed cementitious mortar during the printing process. This study also considered the necessary trial tests, which are required to check the mechanical properties and behaviour of the proportions of the cementitious mix. Mechanical strength was measured and shown to increase when the samples were printed using fibre-reinforced mortar by means of a caulking gun, compared with the samples that were printed using the same mix delivered by a progressive cavity pump to a 6 degree-of-freedom robot. The flexural strength of the four-printed layer fibre-reinforced mortar was found to be 3.44 ± 0.11 MPa and 5.78 ± 0.02 MPa for the one-layer. Moreover, the mortar with different types of nozzles by means of caulking is printed and compared. Several experimental tests for the fresh state of the mortar were conducted and are discussed.
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spelling pubmed-65671832019-06-17 A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar Shakor, Pshtiwan Nejadi, Shami Paul, Gavin Materials (Basel) Article Recently, 3D printing has become one of the most popular additive manufacturing technologies. This technology has been utilised to prototype trial and produced components for various applications, such as fashion, food, automotive, medical, and construction. In recent years, automation also has become increasingly prevalent in the construction field. Extrusion printing is the most successful method to print cementitious materials, but it still faces significant challenges, such as pumpability of materials, buildability, consistency in the materials, flowability, and workability. This paper investigates the properties of 3D printed fibre-reinforced cementitious mortar prisms and members in conjunction with automation to achieve the optimum mechanical strength of printed mortar and to obtain suitable flowability and consistent workability for the mixed cementitious mortar during the printing process. This study also considered the necessary trial tests, which are required to check the mechanical properties and behaviour of the proportions of the cementitious mix. Mechanical strength was measured and shown to increase when the samples were printed using fibre-reinforced mortar by means of a caulking gun, compared with the samples that were printed using the same mix delivered by a progressive cavity pump to a 6 degree-of-freedom robot. The flexural strength of the four-printed layer fibre-reinforced mortar was found to be 3.44 ± 0.11 MPa and 5.78 ± 0.02 MPa for the one-layer. Moreover, the mortar with different types of nozzles by means of caulking is printed and compared. Several experimental tests for the fresh state of the mortar were conducted and are discussed. MDPI 2019-05-26 /pmc/articles/PMC6567183/ /pubmed/31130708 http://dx.doi.org/10.3390/ma12101708 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shakor, Pshtiwan
Nejadi, Shami
Paul, Gavin
A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title_full A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title_fullStr A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title_full_unstemmed A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title_short A Study into the Effect of Different Nozzles Shapes and Fibre-Reinforcement in 3D Printed Mortar
title_sort study into the effect of different nozzles shapes and fibre-reinforcement in 3d printed mortar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567183/
https://www.ncbi.nlm.nih.gov/pubmed/31130708
http://dx.doi.org/10.3390/ma12101708
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