Çağatay Takva

A large share of the existing residential stock, particularly in countries that adopted mandatory thermal insulation codes relatively late, exhibits simultaneously poor thermal and acoustic performance. Although 3D Concrete Printing (3DCP) technology has been independently studied for thermal and acoustic applications, the potential to combine these two applications in a facade system constitutes a research gap. This study presents a case-study application of prefabricated 3DCP cladding panels, featuring a ribbed, geometrically complex surface texture, to the facade of a 50 m² precast Reinforced Concrete (RC) residential unit in Ankara, Türkiye, without major structural intervention. The facade panels are manufactured from geopolymer material based on Construction and Demolition Waste (CDW). A parametric workflow integrating Autodesk Revit with Dynamo-based Sabine acoustic analysis and an ISO 6946 DesignBuilder thermal simulation pipeline is employed to quantify pre- and post-retrofit performance. The 3DCP cladding reduces the composite wall U-value from 0.714 to 0.346 W/m²K (−51.5%) and lowers the mid-frequency reverberation time (RT60) from 1.54 s to 0.88 s (−42.9%), while the existing single-glazed windows are retained as a fixed boundary condition. A diagnostic sub-analysis isolates the acoustic contribution of the unchanged glazing, confirming that the 3DCP surface texture is the dominant driver of absorption improvement. The results demonstrate that 3DCP facade panels constitute a viable, multi-functional retrofit layer that simultaneously enhances thermal performance, interior acoustics, and architectural expression through a single intervention, offering a replicable methodology for performance-driven envelope renewal in the existing building stock.

Space, buildings and cities are continuously shaped by social change, technological innovation, environmental challenges, and cultural values. Theory, Design, Planning and Praxis Perspectives in the Context of Space, Building and City brings together diverse scholarly contributions that explore these dynamic relationships from interdisciplinary perspectives. Covering topics ranging from post-truth architecture, artificial intelligence, virtual and augmented reality in design, spatial justice, public space, and urban identity to architectural conservation, climate-responsive vernacular architecture, heritage preservation, and traditional spatial practices, this book offers a comprehensive examination of contemporary issues in the built environment. The chapters demonstrate how theoretical inquiry, design thinking, planning strategies, and practical applications intersect to shape human experiences across different spatial scales. By addressing the challenges of sustainability, heritage conservation, technological transformation, and social inclusion, the book provides valuable insights for researchers, practitioners, students, and decision-makers. This book contributes to ongoing debates on the future of architecture, urbanism, and spatial production in an increasingly complex and rapidly changing world.

The integration of 3D-printed Construction and Demolition Waste (CDW)-based geopolymer panels into building facades presents a technologically significant frontier that bridges digital fabrication, sustainable material science, and constructive detailing. While 3D printing has gained considerable research attention for structural and freeform applications, studies that document the complete process chain - from mix design and laboratory production to full facade system integration - remain limited. This paper presents a design-based experimental study in which CDW-based geopolymer facade panels were produced via 3D Concrete Printing (3DCP) under laboratory conditions. The study systematically documents the production process, the geometric and technical properties of the panels, and the constructive details required for their application to a real facade system. Key topics addressed include substructure selection, connection typology, joint design, and corner and opening solutions. The findings demonstrate that panel design decisions made during the production phase directly condition the feasibility of facade assembly, and that applicability depends not only on material performance but on the coherence of the panel within a broader system of substructure, connection, and joint resolution. The total material and labor cost of the retrofit application was $329.659 for the 13.5 m2 facade, equivalent to approximately $25/m2 - a figure competitive with conventional prefabricated cladding systems applied at comparable scale. Labor accounted for $167.25 (50.73% of total cost) across two installation days with three workers, while materials (aluminum L-profiles and polyurethane adhesive) accounted for $162.409 (50.27% of total cost).

Urban identity is the multifaceted reflection of a nation’s social, cultural, and historical phenomena. In this study, the memory-space relationship was investigated in Erzurum city center in Türkiye. The aim of the study is to observe the relationship between the concepts of collective, social, popular, and cultural memory, and Yakutiye Madrasa and its surroundings, one of the symbolic and historical buildings. City dwellers were asked statistical questions that evoke city-memory, and psychological and physical feelings were also included in the evaluation process. As a result, it was seen that the concepts of memory made associations in the building and its surroundings and took place in the memories of the participants. Based on the survey study, it was observed that there was not enough association regarding collective memory. According to the responses, social and popular memory was highlighted by 56%, and cultural memory by 39%.

In this study, a thermal analysis of the building envelope of Atatürk University Faculty of Architecture and Design, located in Erzurum in the cold climate zone, was conducted. It is aimed to analyze the thermal efficiency of the educational building on the façade. Firstly, situation analyses were conducted using infrared thermography in the interior spaces and on the exterior. Secondly, a thermal analysis simulation was performed on façade designs used in the faculty. The configurations of indoor and outdoor spaces were obtained with the instantaneous field of view (IFOV) calculator using the Testo 872 thermal camera. Convection thermal loads were applied with the SolidWorks 2022 to simulate the designs. According to the analysis, optimum values were shown in classroom D-306 on glass surfaces, studio D-202 on external walls, studio E-301 on interior walls, studio E-201 on floors, and classroom E-301 on ceilings. According to the surface temperatures on façade sections, the D-202 studio has a 4.1% advantage over the closest performing D-305 and a 33.4% advantage over the farthest performing D-101. According to the simulation results, the glass surfaces used in the autoclaved aerated concrete (AAC) wall had a 39.6% advantage in terms of U-value compared to the glass surfaces in the curtain wall.

There are many parameters that affect the design, construction and performance of the 3D concrete printing (3DCP) construction process. The aim of this study is to identify and categorize those parameters that are effective in this process, to explain the prominent parameters because of the analysis, and to detail the 3DCP process and how it can be optimized. Therefore, this study optimizes the 3DCP process, which is an important sustainable construction technique. The information obtained from existing research identifies the effective parameters in 3DCP. These parameters were evaluated using the fuzzy AHP method by taking expert opinions. The prominent parameters are explained, and their importance is emphasized. As a result of the analysis, it is determined that material properties are the most important input in the process according to their importance/weight and their criterion level.

Otonom robotlar, Endüstri 4.0 sektöründe gelişen teknolojilerden biridir ve bina üretim sektöründe de otonom robotik sistemler kullanılmaktadır. Bu çalışma, bina üretim sektöründe kullanılan otonom robotların uluslararası literatürden tarama yapılarak bulgular ışığında güncel üretimlerin araştırılmasını kapsamaktadır. Otonom robotların hangi teknolojilerle entegre çalıştığı, inşaat sektöründe hangi robotların kullanıldığı konularıyla birlikte avantaj ve dezavantajlarına değinilmiştir. Bu robotların mevcut konumu hakkında durum analizi ile sınıflandırmalar oluşturulmuştur. Çalışmanın amacı, gelişmiş ülkelerde inşaat sektöründe kullanılan otonom robotların sayı ve çeşit bakımından artmakta olduğu görülerek farkındalık oluşturmaktır. Sonuç olarak, ülkemizde henüz çok tanınmayan ve kullanılmayan ancak gelecekte inşaat endüstrisinin ana aktörleri olacak otonom robotları tanıtılarak mevcut kullanımları ve gelecekteki dönüşümleri hakkında incelemeler yapılmıştır.