Effects of deposition velocity in the presence/absence of E6-glass fibre on extrusion-based 3D printed mortar

Shakor, Pshtiwan; Nejadi, Shami; Sutjipto, Sheila; Paul, Gavin; Gowripalan, Nadarajah

doi:10.1016/j.addma.2020.101069

Cited by 29 publications

(31 citation statements)

References 33 publications

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“…Reinforcing fiber, as a useful reinforcement method for 3D-printable cementitious materials, has an adverse impact on material flow behavior [74][75][76]. According to Zareiyan and Khoshnevis [60] and Shakor et al [77], the inclusion of fiber decreases the flowability of 3D-printed concrete. Conversely, Rushing et al [57] reported that adding 0.46 vol.…”

Section: Effective Factorsmentioning

confidence: 99%

“…One approach is to find out the difference between printed and mold-cast specimens from the same batch of materials. The printed specimens for testing are prepared in three different ways: extracted from printed components by sawing or coring [8,26,33,42,46,54,58,61,98,106,107,[116][117][118][119][120][121]; obtained by printing directly [47,77,85,[122][123][124]; or cast in special molds with a specific procedure to simulate the layering process of the extrusion method [125][126][127][128][129]. The other approach is to characterize the hardened properties of the printing mixtures merely by mold-cast samples [32,56,59,106,130].…”

Section: Hardened Propertiesmentioning

confidence: 99%

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Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Hojati

et al. 2020

Sustainability

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3D-printing of cementitious materials is an innovative construction approach with which building elements can be constructed without the use of formwork. Despite potential benefits in the construction industry, it introduces various engineering challenges from the material point of view. This paper reviews the properties of extrusion-based 3D-printed cementitious materials in both fresh and hardened states. Four main properties of fresh-state printing materials are addressed: flowability, extrudability, buildability, and open time, along with hardened properties, including density, compressive strength, flexural strength, tensile bond strength, shrinkage, and cracking. Experimental testing and effective factors of each property are covered, and a mix design procedure is proposed. The main objective of this paper is to provide an overview of the recent development in 3D-printing of cementitious materials and to identify the research gaps that need further investigation.

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Section: Effective Factorsmentioning

confidence: 99%

Section: Hardened Propertiesmentioning

confidence: 99%

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Hojati

et al. 2020

Sustainability

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“…In some cases, the shape of the printed path may also be significantly affected by surface tension [22]. In addition, a crucial role is played for the shape of the printed path, size and shape of the nozzle, deposit velocity, type of pumping device, and pump output [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…The above described way of determining the mixture parameters was widely used by other researchers [4,30,34,41]. However, there are a number of factors that can affect the printing process such as nozzle type, deposit speed, printer type, or pump model [23][24][25]42].…”

Section: Introductionmentioning

confidence: 99%

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3D Concrete Printing for Sustainable Construction

2020

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Despite the rapid development of 3D printing technology for cement composites, there are still a number of unsolved issues related to extrusion printing. One of them is proper mix design that allows for meeting criteria related to the printing of cementitious materials, such as pumpability, buildability, consistency on the materials, flowability and workability, simultaneously incorporating sustainable development ideas. In the case of mixes for 3D printing, the modification of the composition which increases the overall performance does not always go hand in hand with the reduction of negative environmental impact. The article presents the results of tests of eight mixtures modified with reactive and inert mineral additives designed for 3D printing. The mixes were evaluated in terms of their rheological and mechanical properties as well as environmental impact. Initial test results were verified by printing hollow columns up until collapse. Later, the differences between the compressive strength of standard samples and printed columns were determined. In order to summarize the results, a multi-faceted analysis of the properties of the mixes was carried out, introducing assessment indicators for its individual parameters. The article proves that appropriate material modification of mixes for 3D printing can significantly reduce the negative impact on the environment without hindering required 3D printing properties.

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Sub-zero additive manufacturing: a review of peculiarities and applications of additive manufacturing at temperatures below 0 °C

et al. 2022

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Effects of deposition velocity in the presence/absence of E6-glass fibre on extrusion-based 3D printed mortar

Cited by 29 publications

References 33 publications

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

3D Concrete Printing for Sustainable Construction

Sub-zero additive manufacturing: a review of peculiarities and applications of additive manufacturing at temperatures below 0 °C

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