[NK #008] 3DCP link roundup (once more into the fray!)

Dear All, please find below the latest update concerning our beloved Industry 😉

A more “digestible”/reader-friendly (focus on avoidance-of-TLDR mode on 😀) was followed in this circular. Furthermore, all links are grouped (as much as possible) thematically-related 😉

I. Related/selected news clippings collection:

  1. 2 Companies Announce Plans to 3D Print Entire Texas Neighborhood” (link) –> “…if the project succeeds, it could eventually help alleviate chronic shortages of affordable housing in cities across the U.S.
  2. The future of home building? 3D-printed homes coming to the USA” (link) –> “…can withstand extreme weather conditions and be produced leaving much less waste than traditional builds..
  3. A pact towards 3D printing hemp based affordable housing” (link) –> “The companies will form a green box solution–a perfect trifecta of hemp processing, construction ink development and printing–that begins at the farm level creating jobs, training opportunities and innovation with the potential to change the world.
  4. Black Buffalo 3D Announces Pact to 3D Print Plant-Based Affordable Housing” (link) –> “The group’s mission is to introduce a greener alternative to traditional building materials — used for infrastructure, housing, and commercial applications.
  5. The First Park to be Built Using 3D Printing is in China” (link) –> “…is said to be composed of 50% sand that can be obtained locally, thus reducing the environmental footprint and transportation costs
  6. This is the first public park printed in 3D” (link) –> “…the 2,000 pieces that they created to decorate this public park of more than 5,500 square meters, were printed in two and a half months, a fraction of the time that would have been necessary with bricklayers and conventional cement.
  7. Purdue researchers test 3D concrete printing system as part of NSF-funded project” (link) –> “…conducting research into RCAM Technologies’ 3D-printed suction anchors to replace traditional anchors for offshore wind plants.
  8. Offices completed in just 45 hours using 3-D printing technology” (link) –> “Laying down two parallel printing paths creates a hollow wall that is then backfilled with cast-in-place concrete as a load-bearing system. To create the outer wall, a second cavity is formed by printing another mortar path further outside the previous wall and filling this with thermal insulation material. The printed walls can be regarded as a kind of lost formwork system.”

II. Current scientific literature review (published papers):

  1. A review of printing strategies, sustainable cementitious materials and characterization methods in the context of extrusion-based 3D concrete printing” (link), Authors: Yu Chen, Shan He, Yidong Gan, Oğuzhan Çopuroğlu, Fred Veer, Erik Schlangen
    • Excerpt of notice/interest: “Compared to the very high/sufficiently stiff material, the material for set-on-demand printing exhibits exceptionally high fluidity during mixing, pumping, and extrusion processes, which may be more suitable for large-scale construction projects. However, the study of set-on-demand printing is still limited and requires further investigation.”
  2. The influence of interface on the structural stability in 3D concrete printing processes” (link), Authors: Xuanting Liu, Bohua Sun
    • Excerpt of notice/interest: “The numerical model presented in this paper can accuratelypredict the stability failure height of the printed structure, whichindicates that the layer interface is an important index that shouldbe used to evaluate the stability of a printed structure.
  3. Effect of processing parameters on the printing quality of 3D printed composite cement-based materials” (link), Authors: Hongping Zhang, Jianhong Wang, Yaling Liu, Xiaoshuang Zhang, Zhiyi Zhao
    • Excerpt of notice/interest: “The printing speed determines the accuracy of the printing compo-nent size, and the printing line width has a great influence on the printing component size. In the case of certain fluidity, viscosity and nozzle diameter, the printing width decreases with increasing printing speed, and the optimal printing speed is 50 mm/s; The concrete requires advanced leveling at the initial stage of printing. The printing thickness of each layer is different in the leveling stage. After the leveling stage, the thickness of each layer remains at a certain value, which is basically the same as the height of the printing nozzle from the printing layer platform. Intermittent printing with a joint can improve the printing quality, but it easily causes stress concentration at the joint, and special treatment is required to improve the overall strength.
  4. Investigation of the material mixtures and fiber addition for 3D concrete printing” (link), Authors: A Antoni, A Agraputra, D Teopilus, A H Sunaryo, M M Mulyadi, P Pudjisuryadi, J Chandra, D Hardjito
    • Excerpt of notice/interest: “There is an effect in the load direction on the compressive strength of the extruded concrete. The 3D printed concrete loaded parallel or perpendicular to its printing direction could have different compressive strengths. The bond between each layer, extrusion pressure from the subsequent layer, and the setting time of the mixture would play a significant role in controlling the compressive strength.
  5. Creative Compensation (CC): Future of Jobs with Creative Works in 3D Printing” (link), Authors: Chen Liang, Nahyun Kwon, Jeeeun Kim
    • Excerpt of notice/interest: “Although there is a diverse gap between ideal compensation and the current status, it still shows a wide variety of socio-economic opportunities for designers.
  6. Multi-material additive manufacturing in architecture and construction: A review” (link), Authors: Adam Pajonk, Alejandro Prieto, Ulrich Blum, Ulrich Knaack
    • Excerpt of notice/interest: “…initial projects and proof-of-concept models aim to mitigate the general challenges of the industry, such as high material consumption, limited adaptability of components to environmental changes and structural requirements, and an overload of complexity of the prevailing assembly and construction processes. From these projects, the potentials of creating functionally graded transitions, adjusting the material properties across the volume of an object, eliminating interfaces and enabling part-count reduction across different materials, and 4D Printing – programming material behaviour were identified and discussed using the respective examples. These potentials highlight opportunities for MMAM in the architecture and construction industry that can be further 954 developed and transferred to other use cases.
  7. Interlayer Strength of 3D‐Printed Mortar Reinforced by Post-installed Reinforcement” (link), Authors: Jihun Park, Quang‐The Bui, Jungwoo Lee, Changbin Joh, In‐Hwan Yang
    • Excerpt of notice/interest: “The interlayer bonding strengths of 3D‐printed mortar with different curing conditions and reinforcement methods were investigated in this study.”
  8. Modeling and analysis of 3D-printed reinforced and prestressed concrete beams” (link), Authors: J Chandra, H Wibowo, D Wijaya, F O Purnomo, P Pudjisuryadi, A Antoni
    • Excerpt of notice/interest: “The constitutive law for conventional concrete can adequately be used to model 3D-printed RC and PC beams failing in flexure.
  9. Thermal and Environmental Benefits of 3D Printing on Building Construction” (link), Authors: Luiz Rocha, Antonio Ferreira Miguel, Andreas Öchsner
    • Excerpt of notice/interest: “This work presents the most important advances in 3D printing in civil engineering, specifically, a critical review of the thermal and environmental benefits of 3D printing on building construction.
  10. Classification of Robotic 3D Printers in the AEC Industry” (link), Authors: Ala Saif Eldin Sati, Bharadwaj R. K. Mantha, Saleh Abu Dabous, Borja García de Soto
    • Excerpt of notice/interest: “The developed classifications showed that the most used material in 3D printing in the AEC industry is cementitious. Although polymers are the most common material used in 3D printing in different industries, it is limited in AEC industry. The right parameters should be selected in order to determine the appropriate 3D printing robotic systems.
    • Excerpt of notice/interest: “The results of parameter model and finite element simulation were compared with the existing experiments, which verify that the proposed model can better predict the failure length and failure form of 3DCP cylinders, and provide a theoretical guidance for finding the optimal printing parameters set.
  12. The Limitation and Application of geometric Buildings and Civil Structures” (link), Authors: Majid M. Kharnoob, Al hasan J. Hasan, Lana M. Sabti
    • Excerpt of notice/interest: “This invoice concerning trade opinions appears over associated according to the geometric QA concerning constructions then non-military constructions the usage about non-contact sensing technologies.
  13. Is Your Construction Site Secure? A View From the Cybersecurity Perspective” (link), Authors: M. S. Sonkoram B. García de Soto
    • Excerpt of notice/interest: “…an implementation of a generic cybersecurity framework (i.e., the FICIC by NIST) that assesses the employed countermeasures against the construction-specific cyber threats was presented in this paper.
  14. Residential Construction with a Focus on Evaluation of the Life Cycle of Buildings” (link), Authors: Eduard Hromada, Stanislav Vitasek, Jakub Holcman, Renata Schneiderova Heralova, Tomas Krulicky
    • Excerpt of notice/interest: “The paper investigated the potential role of LCC calculations in planning, construction, and operation phases of residential development projects. The paper tested the impact of five variants of heating and hot water preparation on life cycle costs (LCC). The LCC tool developed by the co-authors of this article was used for testing.
  15. Exploring the potential of 3D Printing Construction to address housing issues for South Sudanese Refugees“, MSc Thesis (link), Author: Kyle O’Brien Quinn
    • Excerpt of notice/interest: “If the development of 3D printing reaches the point to where it can become accessible to these hard-to-reach areas and provides enough benefits to supplement the traditional forms of vernacular construction, it has the potential to affect positive change in these areas much like the smartphone has.

Kind regards; everybody remain calm & 3D print 🙂

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