Additive manufacturing technology and its implementation in construction as an eco-innovative solution

Ghaffar, Seyed Hamidreza; Corker, Jorge; Fan, Mizi

doi:10.1016/j.autcon.2018.05.005

Cited by 237 publications

(139 citation statements)

References 65 publications

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“…Similarly, the printing direction would affect the overall concrete properties [56]. As for the concrete mixes that would be compatible with 3D printing, Ghaffar et al [26] state that printable Printed house in Dubai [14] materials are usually a mix of bulk materials, such as soil or crushed stone, mixed with Portland cement or fly ash, and workability additives. Additionally, Lim et al [16] state that a high-performance cement-based mortar has been developed.…”

Section: Methodsmentioning

confidence: 99%

“…First, the chosen powder material is layered to the desired thickness and then the binder is deposited to the areas to be solidified. Later on, the 3D-printed material is taken out of the powder or sand bed [16,26,45].…”

Section: D Printingmentioning

confidence: 99%

“…Paul et al [25] offered a review of 3D concrete printing with a focus on the printing systems and materials properties including the use of reinforcement bars or fibers. Additionally, Ghaffar et al [26] reviewed the systems and materials for 3D printing and discussed the sustainability-related benefits. Lim et al [16] reviewed recent developments in 3D printing with a focus on concrete as a printing material.…”

Section: Introductionmentioning

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

173

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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: Methodsmentioning

confidence: 99%

Section: D Printingmentioning

confidence: 99%

Section: Introductionmentioning

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

173

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show abstract

“…One advantage of 3D-printed construction over conventional construction is the elimination of the need for formwork, which in turn reduces material consumption, construction time, labor demand, environmental impact of materials, and cost [13]. The lack of dependence on formwork facilitates the design and construction of more complex structures, such as the square pyramid base and hollow rectangular core found in the dragon's teeth [14]. The ability to easily print a hollow core or center also introduces opportunities for hybrid 3D-printed/conventional construction methods: for example, the ACES team reduced total print time and material cost by printing a hollow core in each dragon's tooth and subsequently filling the core with sand.…”

Section: Structural Designmentioning

confidence: 99%

“…Another benefit of 3D-printed construction over conventional construction is the opportunity to simplify construction logistics and management by shortening the supply chain [14]. 3D-printed construction replaces countless tools and pieces of heavy equipment with a single printer and pump capable of being transported anywhere in the world in a standard-size shipping container.…”

Section: Logistical Considerationsmentioning

confidence: 99%

The Viability and Simplicity of 3D-Printed Construction: A Military Case Study

et al. 2020

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In November 2019, U.S. Marines, Air Force, and Army Corps of Engineers personnel demonstrated the viability and simplicity of three-dimensionally (3D)-printed construction in a controlled environment at the U.S. Army Engineer Research and Development Center—Construction Engineering Research Laboratory in Champaign, Illinois. The tri-service exercise spanned three days and culminated in the construction of three 1 m × 1 m × 1 m (3 ft × 3 ft × 3 ft) concrete dragon’s teeth (square pyramid military fortifications used to defend against tanks and armored vehicles) and several custom-designed objects. The structural components were printed using a custom-built, gantry-style printer called ACES Lite 2 and a commercially available, proprietary mortar mix. This paper examines the viability of using 3D-printed construction in remote, isolated, and expeditionary environments by considering the benefits and challenges associated with the printing materials, structural design, process efficiency, labor demands, logistical considerations, environmental impact, and project cost. Based on the results of this exercise, 3D-printed construction was found to be faster, safer, less labor-intensive, and more structurally efficient than conventional construction methods: the dragon’s teeth were printed in an average of 57 min each and required only two laborers. However, the use of commercially procured, pre-mixed materials introduced additional cost, logistical burden, and adverse environmental impact as compared to traditional, on-site concrete mixing and production. Finally, this paper suggests future applications and areas of further research for 3D-printed construction.

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