Additive Manufacturing using mobile robots: Opportunities and challenges for building construction

Dörfler, Kathrin; Dielemans, Gido; Lachmayer, Lukas; Recker, Tobias; Raatz, Annika; Lowke, Dirk; Gerke, Markus

doi:10.1016/j.cemconres.2022.106772

Cited by 69 publications

(32 citation statements)

References 35 publications

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“…Proper coordination between suppliers and buyers can lead to the smooth functioning of supply chains with minimum chances of faults. This finding was also suggested in Viriyasitavat et al (2022) andD€ orfler et al (2022). The indicators ranked lower are "On-time delivery" (ECO3) (0.090008), "Quality" (ECO2) (0.087204), "Prompt response" (ECO6) (0.084721), "Financial strength" (ECO7) (0.084237), "Technological competency" (ECO5) (0.073329) and "Risk" (ECO9) (0.062948).…”

Section: Data Analysis and Resultssupporting

confidence: 81%

Can suppliers be sustainable in construction supply chains? Evidence from a construction company using best worst approach

Singh

Kumar

Verma

et al. 2022

MEQ

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PurposeWith increasing pressure from the government and private sectors to be more environmentally and socially responsible, sustainable supplier selection has gained enormous currency in recent times. Particularly, in the case of the construction industry, owing to a large amount of industrial wastage generated and extreme workplace conditions, it is even more important to devise strategies to mitigate the harmful consequences. The most crucial step in this regard is the selection of sustainable suppliers that acquire a pivotal position in the supply chain ecosystem. This study aims to identify indicators for three criteria such as economic, environmental and social, and prioritize them according to their level of significance for sustainable supplier selection in the Indian construction industry.Design/methodology/approachIn this study, the best-worst method (BWM) is presented for sustainable supplier selection in Indian construction organizations. Total of 27 indicators was identified for the three criteria of the triple bottom line (TBL) approach namely economic, environmental and social. Using BWM, the most important criterion was found and subsequently, all the indicators under each criterion were ranked in order of importance.FindingsThe analysis revealed that the environmental criterion was the most important criteria in the sustainable supplier selection followed by the economic criteria. The indicators that were the most influential in the effective selection process were “Usage of recyclable raw materials for production”, “Adoption of clean and green technologies”, “Waste management” and “Periodical environmental audits” under the environmental criteria; “Efficiency”, “Cost” and “Flexibility and Scalability” from the economic criteria; and “Safety programs” and “Information disclosure” in the social criteria.Research limitations/implicationsThe study provides a reference framework for the selection of sustainable suppliers in construction organizations. The findings can also be used for the assessment of suppliers' performance in the supply chains.Originality/valueThe novelty of this work lies in its attempt to model the performance of suppliers in the Indian construction supply chains.

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Section: Data Analysis and Resultssupporting

confidence: 81%

Can suppliers be sustainable in construction supply chains? Evidence from a construction company using best worst approach

Singh

Kumar

Verma

et al. 2022

MEQ

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“…Rapid advancements have been made in the use of digital tools for AM in building construction, with prototypes moving from the laboratory to real-world applications in both private and public building projects. Using in-situ AM technologies in this industry has shown a capacity to greatly increase efficiency and material effectiveness relative to conventional manual production methods [121]. These days, gantry systems are the most common type of large-scale fixed system used for in-situ AM because of their enormous payload capacities and great precision when performing end-effector activities [122].…”

Section: Technological Methods Of Concrete 3d Printing (Pb3dp) 101 Ro...mentioning

confidence: 99%

“…While innovations such as multi-nozzle 3D printing have helped these systems function more effectively, the field as a whole would profit enormously from the introduction of in-situ solutions that allow for the wider use of AM techniques in the building sector. Specifically, the incorporation of independent portable robotics into the building construction process creates new possibilities for in situ AM; Mobile AM (MAM) processes for on-site development could offer an unrestrained work area via improved mobility, opening up new possibilities for infrastructure in terms of manufacturing building elements larger than the system's stationary range [121,123,124]. Communication between several robots in a network, or with human workers and on-site workers, might make this possible, allowing for scalability.…”

Section: Technological Methods Of Concrete 3d Printing (Pb3dp) 101 Ro...mentioning

confidence: 99%

Sustainable Non-Conventional Concrete 3D Printing—A Review

2023

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In this review article, system materials for concrete 2D printing have been discussed, along with the various other aspects that are connected to sustainable construction. The article consists of an introduction giving the background of manufacturing that started almost two decades ago, including the non-conventional methods of building structures. It has been seen that there are various stainable materials in the field of 3D printing in construction, as the conversion of construction to 3D printing reduces waste generation. Further in this article, the cost comparison between conventional and non-conventional construction methods has been discussed, including the effectiveness of 3D printing; 3D printing is very effective in the sense that it requires the precise use of machinery and construction material. Full-scale 3D printing has also been seen in the building sector, but only to some extent. Some of the components of bridges, and even some of small bridges, have been constructed using 3D printing and ultra-high-performance concrete. Since there are various advantages to 3D building, there are also various disadvantages to 3D printing, such as how much it costs and finding the materials that are suitable for 3D printing, which might increase the cost. Polymers have also been used in 3D printing construction since polymers have a very long lifespan, and polymers may increase the strength of the final product by reinforcing the aggregate. Additionally, this technology gives us the opportunity to use various materials together for construction, such as recycled aggregates and geopolymers, along with concrete and cement, which might pose some challenges but are being used nowadays. A major concern with this technology is its impact on the labor market. Since in traditional construction huge amounts of man hours are required, concerns have been raised about the inclusion of this technology, as this might affect employment. Since most of the work will be done by machines, the need for labor will reduce. These are some of the issues that need attention. Finally, this article discusses the novelty and future scope of 3D printing in the construction sector, and concludes by outlining the scope of potential developments for 3D printing concrete by taking into account sustainability.

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“…2, "A"). The majority of mobile platforms are currently in use in a decoupled manner in discrete fabrication mode [13,14], where the base is fixed in position and stabilized for the 3D printing of a concrete building element [15], as demonstrated in the work of current construction robotics start-ups such as CyBe 2 or Apis Cor 3 (Fig. 2, "B").…”

Section: Relevant Workmentioning

confidence: 99%