Conference Agenda

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Session Overview
Session
MAT2
Time:
Monday, 04/July/2022:
2:00pm - 3:30pm

Session Chair: Rolf André BOHNE
Location: Hall C


New materials and components for sustainable buildings

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Presentations
2:00pm - 2:15pm

Structural Optimisation of a Façade Fastening System with the Target Function of Minimising Thermal Conductivity

Matthias ROIK

LEVIAT GmbH, Germany

Affecting a building’s energy efficiency, façade constructions play a decisive role. Among the influencing factors are the following parameters: structural design, layer thickness and thermal conductivity of the used materials.

In the design process described here, only the boundary conditions of the topology within a finite element model were determined, with focus on the environmental aspects. The most important aspect of structural optimisation is the correct formulation of the target function. In this case, the thermal conductivity was set as the first target function, and all other parameters, such as the material input and the production effort, were set as the following ones in order to minimise the production costs. It was shown that the minimisation of the steel cross-section corresponds directly to the reduction of the thermal bridge.

The projected aim was to achieve a significant reduction in thermal conductivity compared to the existing, already improved brackets. While the thermal bridge is minimized, the load-bearing capacity has not been reduced, but could even be increased. This not only improves the environmental balance by saving resources, but also by reducing heat losses over many years to come.

This paper gives an overview of the calculation methods and test methods using the example of a façade fastening with the aim of structural optimisation with regard to previously defined target functions. Results are provided to show the bearing behaviour interacting to the heat transfer during the optimization process. The design rules are explained and the results are illustrated.



2:15pm - 2:30pm

Advanced Modeling Of Concrete Structures For Improved Sustainability

Jiří RYMEŠ, Jan ČERVENKA, Radomír PUKL

Červenka Consulting s.r.o., Czech Republic

The combination of nonlinear finite element analysis with structural monitoring can considerably improve prognosis of structural behavior, deterioration, damage and sustainability. Recently, a digital twin concept is often utilized: a digital replica of the real structure is developed, and simulation of the model behavior under service conditions is performed. Based on the comparison with data from measurements on the real structure the most significant model properties are identified using an advanced probabilistic approach. These appropriate model properties are consequently used for assessments of safety, reliability, durability and sustainability of the investigated structure under service as well as limit conditions. In this concept, the advanced numerical modeling must be supported by advanced monitoring methods. Application of such a methodology allows reliable and accurate recognition of the structural damage and prediction of the remaining lifespan and structural sustainability, based on the deeply identified system, parameter sensitivity simulation, and advanced probabilistic methods. The theoretical background for the utilized particular methods will be presented, and the utilization of the complex methodology for concrete engineering structures will be documented on a practical application example.



2:30pm - 2:45pm

Experiencing Circular Design: Stories of Agri-food Waste Transformed into New Materials for Architecture

Silvia TEDESCO1, Elena MONTACCHINI1, Jacopo ANDREOTTI2

1Politecnico di Torino, Department of Architecture and Design (DAD), Italy; 2Roma Tre University, Department of Architecture, Italy

The application of the Circular Economy model, supported by the European Commission, can be the driver of an industrial and architectural conversion and, also, an opportunity to innovate production processes through the elimination of waste’s concept. Furthermore, the attention of public and private actors as well as policies and rules are now focused on accelerating the ongoing transition from linear to circular economy.

In line with this multisectoral shift, the paper intends to illustrate the results of the research activities carried out at the Politecnico di Torino in cooperation with Small and Medium Enterprises (SMEs) of the Piedmont region (Italy).

In particular, the article illustrates a double experience developed with two different paths: the CIBUS’ research project (Circular economy in the Building Sector from agri-food waste) and the innovative master’s degree course "Design and development the transition to the circular economy".

Both experiences exploit circular economy approaches applied to grape, hazelnut and wheat wastes to understand if whether they could be new “ingredients” for architecture and design.

The results of these activities show how cross-sectoral research between architecture and agriculture can be useful to design new sustainable scenarios in terms of products and processes. The article concludes with some considerations about the new challenges that architects and designers will have to face in the future and the new roles that they will have to play, acting as "conductors" among different stakeholders and encouraging interdisciplinary approaches to design.



2:45pm - 3:00pm

Closing the Loop of Textile: Circular Building Renovation with Novel Recycled Insulations from Wasted Clothes

Andrea AUGELLO, Olga Beatrice CARCASSI, Francesco PITTAU, Laura Elisabetta MALIGHETTI, Enrico DE ANGELIS

Politecnico di Milano, Department of Architecture Built environment and Construction engineering (ABC), Via Ponzio 31, 20133 Milano, Italy

The implementation of new energy policies and standards for NZEB is expected to lead to a significant reduction of GHG emissions from building use in Europe in the next decades. On the other side, the growing pressure on insulation materials risks to significantly contribute to the exhaustion of the remaining carbon budget due to the high carbon intensity of conventional insulation for material processing. Consequently, storing carbon in construction products and promoting circular economies able to generate up-cycling processes from industrial or post-consumption waste are the key strategies to promote an effective transition toward a carbon-neutral society. Fashion & clothing is one of the manufacturing sectors which mostly contributes to waste generation and fossil GHG emission. This paper presents the main outcomes achieved from RECYdress project, which focuses on the valorisation of wasted textile collected by municipal districts to develop novel thermal insulations for building applications. Three alternative conceptual manufacturing processes were defined at lab scale based on different treatment of textile fibres, with produced specimens tested for thermal characterization. Finally, the LCA results of an ETICS application for façade renovation were compared considering as functional unit 1 m2 of façade with similar thermal resistance.



3:00pm - 3:15pm

Prvok - Issue On 3d Printing Concrete Building

Kateřina NOVÁKOVÁ1, Jiří VELE1, Jiří LITOŠ2, Vladimír ŠÁNA2

1CTU Prague, faculty of architecture, Czech Republic; 2CTU Prague, Faculty of civil engineering, Czech Republic

Prvok is the first 3D printed concrete floating house in the Czech Republic. Additive manufacturing - 3D printing became a synonym of sustainable building of the 21st century. Its experimental manner and lack of world's standardisation ISO approvals hold the 3D printing concrete method on the edge of usability and applicability and stop a broader spread of application in practice. Furthermore, the used material was newly developed MBS cement composite [1] prefabricated mixture with polypropylene plastic microfibres, which was not previously tested in large structures. What we achieved, was a practical realisation of a 3D printed fully equipped and functioning concrete house as an inhabitable statue for a public event. In order to fulfil the request on insulation and avoiding heat bridges together with investing least material possible, we parametrically designed and implemented a wall system of construction. In order to be able to open the structure to the public, we tested it on the universal loading machines at Faculty of Civil Engineering CTU in Prague in scale 1:1. Testing fragments of the walls were also part of the research goals, which led us to the final design. In this paper, we present the results of the experiment together with the experimentally obtained data.



 
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