Investigation of Concrete Mixtures for Additive Construction

Rushing, Todd S.; Stynoski, Peter B.; Barna, Lynette A.; Al-Chaar, Ghassan; Burroughs, Jedadiah F.; Shannon, Jameson D.; Kreiger, Megan A.; Case, Michael P.

doi:10.1016/b978-0-12-815481-6.00007-5

Cited by 31 publications

(14 citation statements)

References 10 publications

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“…Rushing et al (Rushing et al, 2019) tested various compositions of mixtures for printing and also performed tests, the results of which they processed in more detail.…”

Section: Influence Of Various Additives and Admixturesmentioning

confidence: 99%

“…The reason was a high dose of the coarse aggregate with a large grain diameter that clogged the print head. Therefore, no further testing was performed on these mixtures (Rushing et al, 2019).…”

Section: Extruder Testingmentioning

confidence: 99%

“…Tab. 2 below shows changes in the composition that are specified (Rushing et al, 2019) The mortar mixtures were also subjected to the same printability test as the concrete. Due to the reduction of the amount of coarse aggregate, all the mixtures were successfully forced through the nozzle.…”

Section: Extruder Testingmentioning

confidence: 99%

“…Surprisingly, even after the addition of water, the bentonite did not help to improve the printability compared to the B0. However, the bentonite increased the dimensional stability of the extruded layer, which is also an important factor (Rushing et al, 2019).…”

Section: Extruder Testingmentioning

confidence: 99%

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Specification of the Properties and Effects of Additives and Admixtures on a Mixture Suitable for 3D Printing of Buildings

Fiľarská

Unčík

Cabanová

2020

Slovak Journal of Civil Engineering

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This article focuses on 3D printing of buildings using cement mortar-based material. Specific requirements are necessary for such a material; it therefore must have different properties compared to conventional cement mortar. These properties of a fresh mixture and the possibilities for their testing are described in more detail in the first part of the article. Specifically, these are pumpability, printability, buildability, and workability. In order to achieve these properties, it is necessary to add various additives and admixtures to the mixtures, in addition to the basic components such as water, sand, and cement. Scientists around the world are working to create an optimal mix. The second part of this article presents an overview of the most commonly used ingredients and their effect on the properties of the mixture.

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“…Rushing et al (Rushing et al, 2019) tested various compositions of mixtures for printing and also performed tests, the results of which they processed in more detail.…”

Section: Influence Of Various Additives and Admixturesmentioning

confidence: 99%

Section: Extruder Testingmentioning

confidence: 99%

Section: Extruder Testingmentioning

confidence: 99%

Section: Extruder Testingmentioning

confidence: 99%

See 2 more Smart Citations

Specification of the Properties and Effects of Additives and Admixtures on a Mixture Suitable for 3D Printing of Buildings

Fiľarská

Unčík

Cabanová

2020

Slovak Journal of Civil Engineering

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“…This limitation is associated with the size of the nozzle and the capability of the machine to continuously extrude. The maximum size of sand particles that have been used in the majority of studies is not more than 2 mm [3,8] but in some cases, aggregates up to the size of 10mm are used [9].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Rheological Properties of 3D Printable Cement Composites

Qasimi¹,

Zulayqa²,

Seifan³

2020

RPM

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Additive manufacturing is a recent revolution in the construction field since cementitious materials became printable. This extrusion technique has enabled the construction of very complex geometry with a reduction in costs, time and labour interventions. This study aims to evaluate the possibility of reinforcing 3D printable cementitious composites with the use of nano and micro materials, particularly nano silica, micro silica and microfibrillated cellulose (MFC) which are known for their ability to enhance the fresh and hardened properties of cement-based composites. Rheology property test, flowability and mechanical properties are the types of tests performed to evaluate the fresh and hardened properties of mortar modified with the rested additives. The results show the addition of MFC of 0.4% (of total solid matter) can significantly enhance the mechanical property. In addition, the presence of MFC (at 0.4% of total solid matter) can reduce the pressure required to extrude the mortar, enabling a steady state extrusion. It was also found that 1% nano silica addition significantly improves the mechanical properties and minimizes segregation in the failure surface.

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Temperature dependance of 3D printed concrete produced with copper tailings

Eugenin,

Cuevas,

Navarrete

2023

ce papers

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Abstract3D printed concrete is being applied in an increasing amount worldwide. While in theory, there are environmental and economic benefits associated with using this technology, in practice, the amount of cement in printable concrete is much higher than in a conventional one, leading to increased environmental and economic costs. Furthermore, cement's performance relies heavily on climate variables, specifically temperature. One way to solve this issue is to include local alternative low‐CO2 materials, such as processed mine tailings, as cement replacement. This paper presents an experimental approach to assess the use of copper tailings as cement replacement in printable concrete under different ambient temperatures. Three levels of cement volume replacement have been researched. The copper tailings' rheological effect has been measured using standard printability tests and a rheometer. Four mixtures have been printed in a controlled‐climate chamber to evaluate print‐ability, buildability and extrudability. The mechanical effect has been assessed with compressive and flexural strength tests of samples collected from the printed specimens. The results show that copper tailings are a promising alternative to cement in printable concrete in countries where this by‐product is abundant.

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Investigation of Concrete Mixtures for Additive Construction

Cited by 31 publications

References 10 publications

Specification of the Properties and Effects of Additives and Admixtures on a Mixture Suitable for 3D Printing of Buildings

Specification of the Properties and Effects of Additives and Admixtures on a Mixture Suitable for 3D Printing of Buildings

Mechanical and Rheological Properties of 3D Printable Cement Composites

Temperature dependance of 3D printed concrete produced with copper tailings

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