Thermal-Humidity Parameters of 3D Printed Wall

Kaszynka, Maria; Olczyk, Norbert; Techman, Mateusz; Skibicki, Szymon; Zieliński, A.; Filipowicz, Krzysztof; Wróblewski, Tomasz; Hoffmann, Marko

doi:10.1088/1757-899x/471/8/082018

Cited by 20 publications

(15 citation statements)

References 20 publications

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“…Furthermore, another possible technique to reach efficient thermal performance is to integrate the thermal insulation. In previous investigations, insulation material has been included in the wall system, as is the case in the study of Kaszynka et al [34], which used mineral wool and polyurethane foam between the 3D printed wall layers. Moreover, other techniques included thermal material in the internal spaces of the printed element [35,36], similarly to the proposed solution.…”

Section: Discussion and Comparisonmentioning

confidence: 99%

Building Envelope Prefabricated with 3D Printing Technology

et al. 2021

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The Fourth Industrial Revolution represents the beginning of a profound change for the building sector. In the last decade, the perspective of shapes, materials, and construction techniques is evolving fast due to the additive manufacturing technology. On the other hand, even if the technology is growing fast and several 3D printed buildings are being developed worldwide, the potential of concrete 3D printing in building prefabrication remains unexplored. Consequently, the application of new digital fabrication technologies in the construction industry requires a redesign of the construction process and its components. This paper proposes a novel conception, design, and prototyping of a precast building envelope to be prefabricated with extrusion-based 3D concrete printing (3DCP). The new design and conception aim to fully exploit the potential of 3D printing for prefabricated components, especially in terms of dry assembly, speed of implementation, reusability, recyclability, modularity, versatility, adaptability, and sustainability. Beyond the novel conceptual design of precast elements, the research investigated the 3D printable cementitious material based on a magnesium potassium phosphate cement (MKPC), which was devised and tested to ensure good performances of the proposed component. Finally, a prototype has been realised in scale with additive manufacturing technology in order to verify the printability and to optimize the extruder path. This study leads us to believe that the combined use of prefabricated systems, construction automation, and innovative materials can decisively improve the construction industry’s sustainability in the future.

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Section: Discussion and Comparisonmentioning

confidence: 99%

Building Envelope Prefabricated with 3D Printing Technology

et al. 2021

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“…The results revealed extremely non-uniform temperature dispersal on the outer wall surface of the examined house, as well as inadequate thermal insulating performance. Moreover, Kaszynka et al [56] determined the thermal properties of a 3D-printed concrete wall that was constructed using High Performance Concrete (HPC) and insulated with mineral wool, and it was found to achieve the thermal and humidity conditions of traditional types of walls such as insulated brick, concrete, and stud walls. The study found that the lower thickness (8 cm) 3D-printed concrete wall reached the same thermal standards as traditional masonry or concrete walls (14 cm) with mineral wool insulation.…”

Section: Performance Of 3dcp Structures Under Elevated Temperaturementioning

confidence: 99%

Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

et al. 2022

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Large-scale additive manufacturing (AM), also known as 3D concrete printing, is becoming well-recognized and, therefore, has gained intensive research attention. However, this technology requires appropriate specifications and standard guidelines. Furthermore, the performance of printable concrete in elevated temperature circumstances has not yet been explored extensively. Hence, the authors believe that there is a demand for a set of standardized findings obtained with the support of experiments and numerical modelling of the fire performance of 3D-printed concrete structural elements. In general, fire experiments and simulations focus on ISO 834 standard fire. However, this may not simulate the real fire behaviour of 3D-printed concrete walls. With the aim of bridging this knowledge disparity, this article presents an analysis of the fire performance of 3D-printed concrete walls with biomimetic hollow cross sections exposed to realistic individual fire circumstances. The fire performance of the non-load-bearing 3D-printed concrete wall was identified by developing a suitable numerical heat transfer model. The legitimacy of the developed numerical model was proved by comparing the time–temperature changes with existing results derived from fire experiments on 3D-printed concrete walls. A parametric study of 96 numerical models was consequently performed and included different 3D-printed concrete wall configurations under four fire curves (standard, prolonged, rapid, and hydrocarbon fire). Moreover, 3D-printed concrete walls and mineral wool cavity infilled wall panels showed enhanced fire performance. Moreover, the cellular structures demonstrated superior insulation fire ratings compared to the other configurations.

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“…The energy savings for the 3D-printed and conventional concrete house were calculated based on the difference between the microclimate and the air temperature surrounding the structure as well as the thickness of the structural elements (external walls and roof). The ISO standard (EN ISO 6946:2008) reported the key factor to indicate the thermal properties of the building is heat transfer (U) in which lower U-value indicates higher energy savings [30]. The U-value [31] and the energy transfer or heat flow (Q) [32] were calculated using Equations ( 1) and (2) [33,34]:…”

Section: Energy Consumptionmentioning

confidence: 99%

Environmental Footprint and Economics of a Full-Scale 3D-Printed House

et al. 2021

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3D printing, is a newly adopted technique in the construction sector with the aim to improve the economics and alleviate environmental impacts. This study assesses the eco-efficiency of 3D printing compared to conventional construction methods in large-scale structural fabrication. A single-storey 3D-printed house was selected in the United Arab Emirates to conduct the comparative assessment against traditional concrete construction. The life cycle assessment (LCA) framework is utilized to quantify the environmental loads of raw materials extraction and manufacturing, as well as energy consumption during construction and operation phases. The economics of the selected structural systems were investigated through life cycle costing analysis (LCCA), that included mainly the construction costs and energy savings. An eco-efficiency analysis was employed to aggregate the results of the LCA and LCCA into a single framework to aid in decision making by selecting the optimum and most eco-efficient alternative. The findings revealed that houses built using additive manufacturing and 3D printed materials were more environmentally favourable. The conventional construction method had higher impacts when compared to the 3D printing method with global warming potential of 1154.20 and 608.55 kg CO2 eq, non-carcinogenic toxicity 675.10 and 11.9 kg 1,4-DCB, and water consumption 233.35 and 183.95 m3, respectively. The 3D printed house was also found to be an economically viable option, with 78% reduction in the overall capital costs when compared to conventional construction methods. The combined environmental and economic results revealed that the overall process of the 3D-printed house had higher eco efficiency compared to concrete-based construction. The main results of the sensitivity analysis revealed that up to 90% of the environmental impacts in 3D printing mortars can be mitigated with decreasing cement ratios.

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Thermal-Humidity Parameters of 3D Printed Wall

Cited by 20 publications

References 20 publications

Building Envelope Prefabricated with 3D Printing Technology

Building Envelope Prefabricated with 3D Printing Technology

Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

Environmental Footprint and Economics of a Full-Scale 3D-Printed House

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