3D Printing Concrete on temporary surfaces: The design and fabrication of a concrete shell structure

Costanzi, Christopher Borg; Ahmed, Zeeshan Y.; Schipper, H.R.; Bos, Freek; Knaack, Ulrich; Wolfs, Rob

doi:10.1016/j.autcon.2018.06.013

Cited by 81 publications

(38 citation statements)

References 4 publications

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“…Hence, the concrete has to support itself as it cures [85]. Because the material is extruded in a wet state, the build-up of layers must be in a manner such that they are self-supporting in order to avoid collapse, imposing somewhat of a restriction on possibilities for realizing some geometries [86].…”

Section: Buildabilitymentioning

confidence: 99%

“…The required concrete might cost more than traditional concrete and this would add additional costs. The lack of buildability arises because material is extruded in a wet state, and hence, the build-up of layers must be such that they are self-supporting in order to avoid collapse [86]. Any unexpected delay between depositions of successive layers could lead to formation of structurally undesirable cold joints [13].…”

Section: D Printing Materials Risksmentioning

confidence: 99%

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A critical review of 3D printing in construction: benefits, challenges, and risks

El-Sayegh

Romdhane

Manjikian

2020

Archiv.Civ.Mech.Eng

190

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This paper provides a critical review of the related literature on 3D printing in construction. The paper discusses and evaluates the different 3D printing techniques in construction. The paper also discusses and categorizes the benefits, challenges, and risks of 3D printing in construction. The use of 3D printing technology offers several advantages over traditional methods. However, it comes with its own additional challenges and risks. The main benefits of 3D printing in construction include constructability and sustainability benefits. The challenges are categorized into seven groups. The main challenges, found through the literature, are material related. The most cited challenges are material printability, buildability, and open time. Additionally, scalability, structural integrity, and lack of codes and regulations are frequently cited as major challenges. The additional risks are categorized into seven groups: 3D printing material, 3D printing equipment, construction site, and environment, management, stakeholders, regulatory and economic, and cybersecurity risks. The paper fills a gap in the literature as it addresses a new aspect of 3D printing, which is risk. The paper also provides some insights, recommendations, and future research ideas.

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Section: Buildabilitymentioning

confidence: 99%

Section: D Printing Materials Risksmentioning

confidence: 99%

A critical review of 3D printing in construction: benefits, challenges, and risks

El-Sayegh

Romdhane

Manjikian

2020

Archiv.Civ.Mech.Eng

190

View full text Add to dashboard Cite

show abstract

“…The step motor (4) rotates the body (5), the position of which is determined by a limit switch (6). The gripper body (7) accommodates DC motors (8), which operate the gripper jaws (9). Presence sensor (10) are attached to the gripper jaws.…”

Section: Gripper Designmentioning

confidence: 99%

“…1.35 (8) Figure 9 presents the relationship between the minimum end bearing length and the time obtained from Equation (8) (red line). It was assumed that the lintel would be installed in the 35th minute, after water was added to the mix.…”

Section: Design Of the Printed Wall Structurementioning

confidence: 99%

“…The printing head moves in 3D space over a programmed path, building up the designed structure layer by layer [2]. Various types of 3D printers are in use, including Cartesian robots [7][8][9], robotic manipulators [10][11][12] and Delta robots [13,14]. Several objects have already been produced with this technology, both for the purposes of demonstration as well as for practical uses [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Automation in the Construction of a 3D-Printed Concrete Wall with the Use of a Lintel Gripper

et al. 2020

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Developments in the automation of construction processes, observable in recent years, is focused on speeding up the construction of buildings and structures. Additive manufacturing using concrete mixes are among the most promising technologies in this respect. 3D concrete printing allows the building up of structure by extruding a mix layer by layer. However, the mix initially has low capacity to transfer loads, which can be particularly troublesome in cases of external components that need to be placed on top such as precast lintels or floor beams. This article describes the application of additive manufacturing technology in the fabrication of a building wall model, in which the door opening was finished with automatic lintel installation. The research adjusts the wall design and printing process, accounting for the rheological and mechanical properties of the fresh concrete, as well as design requirements of Eurocode. The article demonstrates that the process can be planned precisely and how the growth of stress in fresh concrete can be simulated, against the strength level developed. The conclusions drawn from this research will be of use in designing larger civil structures. Furthermore, the adverse effects of concrete shrinkage on structures is also presented, together with appropriate methods of control.

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Fließfertigung von variablen gekrümmten Modulen für dünnwandige Schalenkonstruktionen aus Beton

Ivaniuk,

Tošić,

Lordick

et al. 2024

Beton und Stahlbetonbau

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Dünne Betonschalen ermöglichen eine erhebliche Materialeinsparung. Die herkömmlichen Herstellungsmethoden von Betonschalen, die auf der Betonage in einer Schalung basieren, sind jedoch aus heutiger Sicht unwirtschaftlich. Der modulare Ansatz kann den Schalenbau deutlich kosteneffizienter machen, insbesondere, wenn Module mit einem hohen Automatisierungsgrad gefertigt werden. Das laufende Projekt „Schalungsfreie Fließfertigung adaptiver Tragstrukturen aus variablen Rahmenelementen – ACDC and beyond“ zielt darauf ab, einen Ansatz für die vollautomatische Herstellung von Betonschalenmodulen mit variabler Geometrie zu entwickeln. Besonderes Augenmerk gilt dabei der Bewehrung der Module, die mittels automatisierter Verlegung von Carbongarnen erfolgt. Die Konturen der Module werden mit hochduktilem Beton (engl.: Strain‐Hardening Cementitious Composite, SHCC) 3D‐gedruckt. Dieser Aufsatz stellt die im Rahmen des Projekts erzielten Ergebnisse vor und gibt einen Überblick über die laufenden Arbeiten, zu denen die Herstellung nicht planarer Module, die Einführung von Nachbearbeitungstechniken und die Verbesserung der Nachhaltigkeit der Technologie gehören.

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3D Printing Concrete on temporary surfaces: The design and fabrication of a concrete shell structure

Cited by 81 publications

References 4 publications

A critical review of 3D printing in construction: benefits, challenges, and risks

A critical review of 3D printing in construction: benefits, challenges, and risks

Automation in the Construction of a 3D-Printed Concrete Wall with the Use of a Lintel Gripper

Fließfertigung von variablen gekrümmten Modulen für dünnwandige Schalenkonstruktionen aus Beton

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