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Translation abstract Minimal Mineral – Transforming Ceiling Systems: Shaping Tomorrow's Sustainable ConstructionCeiling systems, due to their volume and materiality – alongside the foundation – are central key components for sustainable construction. Innovations in this area can significantly reduce resource consumption and greenhouse gas emissions, while simultaneously strengthening regional diversity in the construction industry. The presented research approach not only aims at material savings but also strives for comprehensive optimization using digital technologies. Historical construction systems with proven circular characteristics serve as the foundation for development. As part of the “Minimal Mineral” project, digital manufacturing methods are being researched to develop a catalog of innovative, multimodal ceiling systems. The consistent application of computer‐aided design and analysis tools, as well as digital manufacturing processes such as 3D printing and robotics, enable new resource‐efficient construction methods and the use of more sustainable materials. The resulting component catalog is based on tested historical construction methods, thus ensuring a rapid practical application. The focus of the report is on preliminary investigations for a prototype application for a current construction project in northern France, which is currently in the planning phase. The planned novel ceiling system consists of prefabricated mineral formwork elements with integrated sound absorption functions. [ABSTRACT FROM AUTHOR]

Bolted connections are a highly efficient joining method, especially for constructions with mixed materials or final coated parts as well as maintenance‐friendly constructions, and significantly influence the design. The VDI 2230–1 forms the basis for the dimensioning of such joints in mechanical engineering. To meet tolerance requirements in the assembly of components and subassemblies and to enable a efficient production process, the holes for the connections are often designed as oversized round or slotted holes. However, the increased nominal hole clearance is not taken into account in the calculation steps R0 to R13 for the calculation of highly stressed bolted joints with one cylindrical bolt according to VDI Guideline 2230–1, which leads to overdimensioning or auxiliary constructions. The practical verification often can only be supported by cost‐intensive individual case studies based on laboratory tests. The investigations shown in this paper aim on the determination of the pressure distribution in the interface, the bolt resilience as well as the influence of the hole geometry on the plate resilience to create a well founded data basis for the development of an analytical calculation model according to VDI 2230–1 for bolted connections with increased nominal hole clearance. [ABSTRACT FROM AUTHOR]

Material‐minimized rib and honeycomb slabs made of extruded carbon‐reinforced concrete webs In order to reduce the resource consumption and the Carbon footprint of the construction industry, new construction principles are required that minimize the use of materials. Walls, ceilings and foundations, which account for more than 60 % of the total volume of concrete used worldwide, offer great potential for saving material and CO2 emissions. One promising approach is the use of carbon reinforcement, as it only requires a small concrete cover due to its corrosion resistance. In terms of the topology of the structural member, material‐efficient ribbed or waffle plates have been used for decades. However, they are not often used in Europe due to their labor‐intensive manufacturing, which requires manual installation of the formwork. A recently developed extrusion production process enables the fast, formwork‐free production of semi‐finished precast components for the fabrication of uniaxially and biaxially supported carbon‐reinforced concrete ceiling systems. Parts of the work on the extrusion process have already been presented in [1] and are used in this article to realize novel material‐minimized ribbed and honeycomb floor slabs from prefabricated extruded carbon‐reinforced concrete webs or honeycombs. In addition, an outlook is given on the large‐scale production of uniaxial and biaxial supported panel systems such as ribbed, waffle, and sandwich panels with honeycomb filling. [ABSTRACT FROM AUTHOR]

An outlook on the interaction between the folding process and the drapability of the textile reinforcement The production of textile‐reinforced concrete (TRC) components, particularly by preforming, has traditionally relied heavily on iterative processes and decisions. While this approach is effective for certain established TRC applications, it leads to a significant planning effort and carries the risk of overlooking technically or economically more favorable alternatives. This paper proposes to utilize the principles of folded load‐bearing structures as the basis for the production line of TRC components. This new methodology has both material and process requirements and focuses on the use of folded formwork and its effects on the drapability of reinforcement textiles. Based on initial findings from the field of folded formwork and the analysis of the drapability of textile mesh reinforcements, the relationships and dependencies between the material "textile", the process "folded formwork" and the product "folded load‐bearing TRC structures" are shown and the challenges of these subfields are revealed. In this way, the study aims to rationalize production planning, reduce dependence on traditional methods and open up ways of incorporating innovative materials and processes into TRC production. The approach harbors significant potential for the economic viability of folded load‐bearing TRC structures. [ABSTRACT FROM AUTHOR]

Material‐saving concrete ceiling made from 3D‐printed interlocking blocks A new modular design principle has the potential to revolutionize concrete construction: the concept of topological interlocking of building blocks. The innovative arrangement of these interlocking blocks effectively prevents kinematic loading of individual blocks by the entire assembly by immobilising each other. This study investigates the synergy between topological interlocking and 3D concrete printing and conducts a comprehensive analysis of the manufacturing processes and structural performance. The interlocking blocks, which interlock without binders, offer outstanding prospects for sustainable construction. The study presents a method for optimising block geometries for 3D printing to ensure interlocking integrity. Three specific block geometries are developed and tested for 3D concrete printing. Different methods are used to produce interlocking blocks in 3D concrete printing. A geometry is selected and tested on both a small and large scale in the form of a plate system. This is followed by experimental tests, including precise 3D photogrammetry measurements, to evaluate the structural behaviour of these plate systems. The results impressively demonstrate the feasibility and enormous potential of integrating topological interlocking and 3D concrete printing for sustainable construction applications. [ABSTRACT FROM AUTHOR]

Copyright of Elektronik Industrie is the property of Hüthig GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Glass constructions at the turn of the century The period of high modernism (ca. 1880–1970) goes hand in hand with technical developments of the industrial revolution, which leads from handicraft production to the industrial mass production of glass. The further development of manufacturing processes and the dimensions and qualities of the glass panes now available had a considerable influence on the development of glass constructions and profiles. Using selected examples, this article traces the development of flat glass applications from 1880 to 1920 in order to demonstrate changes in glass construction. [ABSTRACT FROM AUTHOR]

Erection of modularised shell structures with prestressed dry joints The exponential growth of concrete production in recent decades has led to a high raw material consumption and a large amount of CO2 emissions. To minimise the use of resources, material‐efficient structures such as shell structures, which are adapted to the distribution of forces, can be used as a basis. However, due to their curved geometry, these structures involve a complex construction process. Modular construction with industrially prefabricated concrete components can contribute to more efficient production and construction processes, combining the advantages of prefabrication with the benefits of material‐efficient load‐bearing structures. This article presents a concept for the modularisation of simply curved shell structures and demonstrates a method for the rapid erection of curved structures with prefabricated individual precast elements and prestressed dry joints. The feasibility is demonstrated by experimental investigations. [ABSTRACT FROM AUTHOR]

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Copyright of Kieferorthopädie: die Zeitschrift für die Praxis is the property of Quintessenz Verlags GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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The article presents Plastics Metal Stir Welding (PMSW) as a groundbreaking technique from Royos Joining Solutions GmbH that enables the durable connection of various thermoplastics with metals, significantly enhancing production efficiency and material versatility in industries like automotive and aerospace. It states that this innovation allows for reliable welding without the need for pre-treatment, streamlining the manufacturing process.

Spent coffee grounds (SCG) contain coffee oil with a significant amount of unsaturated fatty acids. In a publicly funded research project, SCG from the industrial production of instant coffee was investigated regarding their applications in the material processing industry. The isolation, functionalization, and application of the unsaturated fatty acids was a central objective. Fatty acids enclosed in the SCG were released in the form of fatty acid methyl esters by means of an in situ process of esterification and transesterification. [ABSTRACT FROM AUTHOR]

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Copyright of Quintessenz der Zahntechnik is the property of Quintessenz Verlags GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Quintessenz der Zahntechnik is the property of Quintessenz Verlags GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Quintessenz der Zahntechnik is the property of Quintessenz Verlags GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal for Religion in Education / Religionspädagogische Beiträge is the property of Arbeitsgemeinschaft Katholische Religionspadagogik & Katechetik (AKRK) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article "A Title Divergence in the Tomb Robber Papyri: Possible Evidence for Removal from Office as a Punishment" examines the title divergence of the tomb robber Amenemheb in the tomb robber papyri. The author analyzes the Amherst 6 + Léopold II papyrus and concludes that Amenemheb lost his titles due to removal from office and was subsequently sentenced to death. The investigation provides insights into the judiciary and punishments in ancient Egypt. Various individuals and their functions are listed, including the High Priest of Amunrasonther. The papyrus also contains information about thieves who were captured in a pyramid. It is suspected that it is the same person, although different titles are used. It is also discussed why the fourth column of the papyrus is dated earlier than the previous ones. The text deals with the title of an employee of the Temple of Amenope. It is argued that the various evidence refers to the same person. The name Amenemheb is mentioned several times in the tomb robber papyri, with indications that it is the same person. The order of the columns in the papyrus is also mentioned, indicating that the dates are correct. It is argued that it is unlikely that the ancient scribe made mistakes. The text is about the interrogation of thieves who broke into a pyramid. The thieves were presented to the overseer of Thebes and vizier Chaemwaset, the royal attendant Nesamun, and the pharaoh's scribe. They showed the officials the pyramid they had broken into. The interrogation and conviction of the thieves were written down and sent to the pharaoh. The different titles of the individuals involved are also discussed, with an "rwḏ. w" having a higher status than an "ꜥ ḥ. wtj". The text deals with the meaning of the title "rwḏw" in ancient Egyptian texts. It is stated that the title refers to officials who worked for an administration and managed or controlled remote goods on behalf of the owner. It is also noted that the title had a higher social rank than the title "ꜥ ḥ. wtj". Various interpretations are discussed as to why Amenemheb's title is given differently in the tomb robber papyri. It is suspected that this is due to the production process of the papyrus and that the title was changed afterwards to conceal Amenemheb's true office. The exact timing of Amenemheb's removal from office cannot be determined precisely, but it is between the 19th day after the interrogation and verification by the on-site inspection and the writing down of the text on the 22nd day. In the text, Amenemheb is addressed as a former rwḏ. w to clearly identify him. It is suspected that Amenemheb was already demoted before the interrogation, as he may have been an ꜥ ḥ. wtj for some time. Removal from office as a punishment was known in ancient Egypt but is rarely discussed in literature. It is suspected that the perpetrators were executed and that the loss of office was an additional punishment. The Handbook of Oriental Studies only mentions the punishment method of removal from office briefly. [Extracted from the article]

Development of a wrapping process for building components made of glassfiber and textile‐reinforced concrete In the research project WiFaPu (wrapping process for highly fiber‐reinforced concrete using the example of a pump sump), a wrapping process was developed that combines the advantages of glassfiber‐reinforced concrete and textile‐reinforced concrete in terms of manufacturing processes and composite load‐bearing behavior. In the developed process, the fine‐grained concrete together with blown in short fibers is sprayed on a carrier sheet as well as on the textile reinforcement to produce a thin glassfiber and textile‐reinforced concrete layer of defined thickness, which is wrapped up in a quasi‐continuous process to form a component of any cross‐sectional thickness. The article reports on the challenges in the development of the wrapping process and the associated coordination of the material components in order to produce durable components with simple geometries, acceptable surfaces and a reduced CO2 footprint. Pump sumps are produced as demonstrator components of the process and their load‐bearing capacity and suitability for use are analyzed. According to the experimental load tests of critical component areas, components with a high load‐bearing capacity are produced. Filling tests show that serviceable pump sumps can be produced using the wrapping process. The overall high water impermeability of the thin‐walled components is made possible by fine‐grained concrete with low water penetration depth and very small crack widths with high self‐healing potential. [ABSTRACT FROM AUTHOR]

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The article focuses on the complex construction and fabrication process of "light eyes" for the Stuttgart 21 underground train station, aiming to provide ample daylight using a combination of structurally demanding concrete support columns. Topics include the challenging welding process, the selection of optimal preheating techniques, and the implementation of deep induction heating for efficient and reliable welding, ensuring the success of the ambitious construction project.