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Copyright of Standort: Zeitschrift für Angewandte Geographie is the property of Springer Nature 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 Standort: Zeitschrift für Angewandte Geographie is the property of Springer Nature 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 Standort: Zeitschrift für Angewandte Geographie is the property of Springer Nature 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 Standort: Zeitschrift für Angewandte Geographie is the property of Springer Nature 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.)

Evaluation of new concrete regarding the load‐bearing behavior and the greenhouse gas reduction in the manufacturing process The production of concrete components has to become more sustainable to protect the climate. One approach is the fundamental change in the concrete recipes in terms of their materials and mass proportions. Change has to be done so that the use of primary raw materials is significantly reduced without adversely changing or improving the physical properties of the concrete. This essay deals with current international research results on sustainable, circulation‐optimized concrete mix formulations and their achieved 28‐day compressive strength values. The results were evaluated with an analysis model using the empirical compressive strength values of the formulations and their possible CO2 savings in the manufacturing process. The difference in the greenhouse potential is based on a reduced life cycle inventory study of the material flows. The evaluation of the available data shows that a sustainable result can be achieved using industrial waste and by‐products in concrete, such as copper slag, ceramic or foundry waste and stone sludge powder. By using these products, carbon dioxide emissions are reduced and an increase in the 28‐day compressive strength compared to the reference sample could be achieved. The examined studies with recycled aggregates from mixed and broken concrete waste mostly led to a negative analysis value due to reduced strength values. [ABSTRACT FROM AUTHOR]

Copyright of BHM Berg- und Hüttenmännische Monatshefte is the property of Springer Nature 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.)

CERN (Conseil Européen pour la Recherche Nucléaire) is the world's largest research centre for high‐energy and particle physics. The research infrastructure contributed to the greatest successes in the field of experimental physics. A new, approximatively 91 km long subsurface infrastructure connected to the existing particle accelerator complex is being conceived in the frame of the Future Circular Collider. It would serve a global community of researchers with two subsequently operated particle colliders until the end of the 21st century. Even at an early stage of such a project, comprehensive investigations have to be carried out into the nature of the subsoil in order to find an optimal utilisation strategy for the excavated material in accordance with the national and international regulations in order to promote the recycling of excavated tunnel material in terms of resource conservation and the improvement of the sustainability of underground construction projects. [ABSTRACT FROM AUTHOR]

Sustainability is a guiding principle for political, economic and ecological action, which in companies, societies and countries all over the world, is based on the following three pillars: ecology, economy and social aspects. With the associated worldwide efforts to reduce emissions, this topic has also arrived in the construction industry in general and thus in tunnel construction in particular. In addition to the actual planning, construction, use and maintenance of mined structures, tunnel builders certainly have a special role to play, since the creation of underground structures relieves overground structures and can also change living space for the better. However, the influences and impact must always be considered in the overall context of all three pillars of sustainability – and in our fast‐paced times, this requires a considerable change in mindset as well as a clear change and expansion of the assessment standards. The following article draws a current picture of "sustainable tunnelling" on the basis of four sub‐sections that describe selected tasks and approaches from the perspective of operators, planners, the construction industry and science as a basis for discussion. [ABSTRACT FROM AUTHOR]

The Iron Age shipwrecks of Agde K (Brescou Island, France) and Cabrera B (Balearic Islands), discovered in the 1960s, together yielded seven lead ingots cast in the large shells of Pinna nobilis molluscs. Lead isotope analysis later traced the ingots to lead sources in south-eastern Iberia. These ingots are reassessed here as evidence for the integration of coastal production strategies in Iron Age south-eastern Iberia, revealing material connections between metallurgy and coastal industries linked to the exploitation of Pinna nobilis, such as sea silk manufacture. This compelling example of reuse of materials from one industry in another attests to a circular economic activity that is likely to have had practical and environmental motivations. The author aims to promote the recognition of Pinna nobilis shell casting and similar reuse phenomena elsewhere in the Mediterranean basin. [ABSTRACT FROM AUTHOR]

Roadmap for a greenhouse gas neutral autoclaved aerated concrete industry in Europe The building and construction sectors account for a significant share of Europe's greenhouse gas emissions that contribute to climate change. This roadmap sets out a pathway for Autoclaved Aerated Concrete (AAC) products to reach net‐zero emissions by 2050 with the potential to become carbon negative, thereby removing more carbon from the atmosphere than was released during production, transport, use and after‐use. A scenario for the year 2050 was drawn from technical measures for efficiency optimizations, the switch from fossil to renewable energy sources and a current life‐cycle analysis of a representative AAC product. As the majority of emissions of CO2‐equivalents come not from the manufacture of AAC itself, but from the manufacture of two key raw materials – cement and lime – the roadmap draws on the decarbonisation pathways published by global and European cement and lime industry associations. Through this roadmap, the EAACA and its members are committed to achieving net‐zero emissions in AAC products by 2050 and supporting the development of a climateneutral Europe. [ABSTRACT FROM AUTHOR]

Copyright of Socijalna Ekologija is the property of Croatian Sociological Association 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.)

"Keeping it up" is out of the question – steel construction production must become climate‐neutral Owners of Medium‐sized steel construction companies and employers also have a personal responsibility to position their companies and their industry in a sustainable manner in the interests of future generations. A personal contribution explains how the entrepreneur Bernhard Hahner acts within the six areas of action worked out for his company in order to continuously come closer to the goal of "climate‐neutral steel construction". The article examines the possibilities of influencing suppliers and service providers, presents the development of own sustainable steel construction products and, in the area of "steel construction production", explains changes and improvements to buildings and systems that have already been implemented and are planned. Another topic is the cooperation with customers who both demand sustainable production and who can optimize projects before the start of production through intensive cooperation in the planning phase. Trends such as urban mining or building information modeling are also discussed. Conclusion of the current situation: far‐reaching changes are unavoidable, but they are also realistically feasible. [ABSTRACT FROM AUTHOR]

The destructive impact of the construction industry on the planet and its inhabitants is no longer in question. Global warming, waste management, depletion of natural resources, air and soil pollution are all issues that must be urgently addressed. They are also challenging the current economy, whose growth is directly correlated to the extraction of raw materials, the manufacture of new products and, ultimately, to their increased consumption. Besides, the constant transformation of the built environment and infrastructure of a territory is a necessary lever for sustainable development and for guaranteeing the well‐being of all. Faced with this situation, an emerging circular strategy could be salutary: component reuse, which makes it possible to build new assemblies without manufacturing new materials. Steel, if assembled with reversible means, is a particularly well‐suited material for reuse. But are the stakeholders ready to adopt new business models? [ABSTRACT FROM AUTHOR]

Circular economy in steel and lightweight metal construction The implementation of the principles of the circular economy in the construction sector has a major impact on global climate policy goals and has great potential to reduce the environmental impact of the manufacture of building products and the dependence on non‐renewable natural resources. This paper provides an overview of different strategies for implementing sustainability and the circular economy in general and in relation to construction. In addition, various examples and initiatives are described that deal with the implementation of these strategies in steel and lightweight metal construction. In particular, these are resource efficiency, reuse and refurbishment. [ABSTRACT FROM AUTHOR]

Resource and emission efficiency in bridge construction using the example of the Leverkusen campus bridge The construction industry is a major contributor to the global emissions of climate‐affecting CO2. Solutions on the track to carbon‐neutral construction and operation can only be achieved through a holistic approach that includes the use of resources. The approach spans from questions about the necessity and size of a building (build less), through a planned re‐use of components and the reduction of material in the design process (build clever), to the selection of materials based on their specific grey emissions (build efficiently) in a tight circulation system (minimise waste). A uniform assessment of the efficiency of resources and emissions for bridge structures is currently not possible due to the lack of internationally coordinated regulations. Using the example of the Campusbrücke in Opladen, Leverkusen, a footbridge built in 2013, the paper explores the different practical approaches that have contributed to a reduction of emissions and used resources. Using a Life Cycle Analysis method (LCA), the selected structure is compared to an alternative design. [ABSTRACT FROM AUTHOR]

Circular waste management is the answer to the daily waste of all types. Wind power plants installed in the 1990s are ending their service life of turbine blades, hence the need to properly manage this waste. The aim of the article is to investigate the mechanical properties of mining and industrial waste The article presents the results of research on geopolymers based on coal shale of the Staszic mine and waste from wind turbine blades in three types of compositions: 50/50, 72/25, 25/75. The results of the research show that these materials can be used as fillers for products that do not require high strength values. [ABSTRACT FROM AUTHOR]

Copyright of BHM Berg- und Hüttenmännische Monatshefte is the property of Springer Nature 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 Österreichische Wasser- und Abfallwirtschaft is the property of Springer Nature 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.)

Sustainable construction – pathways and implementation strategies in structures Climate change is one of the biggest challenges we will have to face in the coming decades. With a share of almost 40 %, the construction industry accounts for a significant share of anthropogenic greenhouse gas emissions. The increasingly intensive use of our habitats and the consumption of natural resources are further social tasks for the future preservation of our planet. The decarbonisation of the construction industry is a key factor. But even with sound concepts, architects and specialist planners can make important contributions to a sustainable construction sector. The reduction of energy‐intensive building materials, the simplification of buildings in the direction of low‐tech architecture and the appreciation of existing buildings as material banks are essential basic principles of a new and absolutely necessary planning culture. The transfer from the linear to the circular economy will also have to prevail in the construction industry, the pure downcycle of materials will not be sufficient to eliminate resource consumption and greenhouse gas emissions. Architects, structural engineers, and specialists can set decisive impulses in a pioneering role with creativity and attitude and convince builders in their courage and willingness to implement sustainable planning through their profession. Politicians are called upon to reward sustainable planning through economic incentives and funding programs. Standards and building codes must be simplified in order to pave the way for more sustainability and not to block the implementation of convincing solutions. The major climate policy goals and achievements are just as important as the identification of successes at project level. To this end, we need an altruistic exchange of knowledge and a cultural debate between all those involved in construction in order to set new standards in the construction sector and to make successes and failures transparent. [ABSTRACT FROM AUTHOR]

Summary In the last decades, plastics have succeeded on the market to a degree that produced volumes have grown tremendously. Since appropriate end of life management has not kept up globally, the waste problem has escalated. In a circular economy, on the other hand, plastics are not deposited in the environment as waste or burnt yielding CO2, but avoided in single‐use applications and reused as a material or raw material. Since there are many dependencies, the sustainability of every step of a circular economy must be systematically considered in relation to the entire cycle, including energy demand and emissions. The further development of dedicated – potentially complementary – recycling processes, along with further innovations in sorting and design of materials and products, will be key to closing the cycles for plastics in a sustainable manner. [ABSTRACT FROM AUTHOR]

A pilot market of the future The pilot concept REWE Green Farming, developed by the architects from acme and engineers from knippershelbig, describes a supermarket of the future – an architecture that restores our human connection to locally produced food and at the same time it makes the dimensions of sustainable construction visible by using timber as a main construction material. The production processes of food are made visible and celebrated for the user. An aquaponics farm is integrated into the market functions, with a fish farm located on a mezzanine floor and the cultivation of basil in a greenhouse on the roof of the market. The market is considered to be a prototype, with its flexible and modular construction principle being able to transfer to other site typologies. Simple and honest, this is how the structural design for the timber building presents itself. A spatial timber structure made of stacked glulam beams serves to carry the loads and at the same time becomes a defining element of the interior design and market identity. The form of the column heads and the internal flow of forces from the beam layers into the column construction were influenced by the controlled use of material properties and joining techniques, with the aim of taking the demands of use into account, architecture, feasibility and economy and focusing on the expressiveness of a resource‐saving construction method. [ABSTRACT FROM AUTHOR]

Without the intensive use of metals, the implementation of current strategies such as the realisation of renewable energy production or electromobility in Germany would be unthinkable. A secure supply of all primary metals to industry cannot be considered guaranteed due to de facto monopoly structures and the trend towards decreasing ore contents. Improved recycling can increase resource efficiency and reduce dependence on imports. The challenges associated with this and possible solutions are discussed. [ABSTRACT FROM AUTHOR]

Wir leben in beispiellosen Zeiten. Die Menschheit sieht sich mit Herausforderungen konfrontiert, deren Lösung keinen Lebensbereich unberührt lassen. Als Planer und Ingenieure müssen wir täglich Entscheidungen von gesellschaftlicher Relevanz treffen. Die Energieeffizienz eines Bauwerks steht in direkter Abhängigkeit zur Effizienz einer sorgfältig geplanten Gebäudehülle. Der Fokus auf die Betriebsenergiebilanzierung steht außer Frage. Wichtige Themen wie Materialknappheit, Energieverbrauch und CO2‐Emission während der Herstellung sowie Wasserverbrauch, Lebenszyklus und Kreislaufdenken stehen noch im Hintergrund. Dieser Beitrag möchte die Möglichkeiten als auch Grenzen diskutieren, welche uns als Planer der menschgemachten Umwelt zur Verfügung stehen. The building envelope in the circular economy and the United Nations Sustainable Development Goals. We are living in unprecedented times. As humanity we face monumental challenges and going forward the decisions we take for every aspect of our life will be pivotal for generations to come. As designers and engineers we take informed decisions every day. When designing a building, its energy performance is linked to the performance of a diligent envelope design. Throughout a design‐process, nowadays nobody questions the focus on operational energy consumption. Important questions such as scarcity of materials, energy consumption during production, carbon emission, embodied carbon, water consumption, material lifecycle and circularity to name only a few, are only slowly entering center stage. The following paper will discuss the possibilities, as well as limitations we face as designers and creators of the built environment. [ABSTRACT FROM AUTHOR]

In the last decades, the circular bioeconomy concept has gained research and political interest, in line with the goals of the 2030 Agenda for Sustainable Development. In this context, the forest-based sector plays a key role ensuring the sustainable and balanced environmental, economic, and social development using bio-based resources. The present study is aimed at implementing the Italian National Sustainable Development Strategy 2017/2030 (NSDS) in the forest-based sector. Specifically, our study aims to define a set of practical, simple, and easy to apply indicators to assess the performance of the forest-wood chain following the principles of circular bioeconomy. Adopting a bottom-up approach the study was structured in three steps: (1) literature review on circular bioeconomy related to forest-based science by applying social network analysis to bibliometric science; (2) identification of a set of indicators suitable to assess the forest-based sector; (3) decision makers’ involvement at regional level (Tuscany, Central Italy) through a questionnaire survey and evaluation of the indicators’ suitability to assess the performance of the forest-wood chain. The results of literature review show some clusters in the circular bioeconomy literature related to key topics such as climate change mitigation, environmental impacts, biotechnology, and sustainability. Through the literature review, a set of 14 indicators was developed and classified considering the three pillars of sustainability (environmental, economic, and social) and the 4R (Reduce, Reuse, Recycle, Recover) of circular economy. 30 decision makers evaluated and prioritized the indicators evidencing the most important to assess circular bioeconomy. Our study of the monitoring of the performance of the forest-based sector provide insights for researchers, managers, and policy makers to network together for advancing the sustainability transition to a circular bioeconomy in accordance with the principles of a low-carbon society. [ABSTRACT FROM AUTHOR]

Copyright of BHM Berg- und Hüttenmännische Monatshefte is the property of Springer Nature 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 Österreichische Wasser- und Abfallwirtschaft is the property of Springer Nature 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 Österreichische Wasser- und Abfallwirtschaft is the property of Springer Nature 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.)

Angesichts des steigenden ökologischen Bewusstseins zielt die Materialentwicklung in erster Linie auf die Verbesserung der Leistung und Effizienz innovativer und komplexerer Materialien ab. Eine Leistungsbewertung von Werkstoffen sollte jedoch wesentliche Aspekte von Materialien einbeziehen: Umweltauswirkungen, wirtschaftliche Zwänge, technische Machbarkeit usw. Daher wollen wir die Einbeziehung von Nachhaltigkeitskriterien bereits während des Materialdesignprozesses anstoßen. Mit einem solchen ganzheitlichen Designansatz ist es wahrscheinlicher, dass neue Produkte die Anforderungen der Kreislaufwirtschaft erfüllen, als wenn traditionelle Entwicklungsstrategien verfolgt werden. Am Beispiel von Katalysatoren für die Wasserelektrolyse präsentieren wir eine auf experimentellen Daten basierende Modellierungsmethode zur ganzheitlichen Bewertung von Prozessen. [ABSTRACT FROM AUTHOR]

In this article, the results of the NaWuReT (Early Career Reaction Engineers) workshop on the topic "Are we doing relevant science?" are presented. The topics "(In)surmountable hurdles for Citizen Scientists in reaction engineering?" and "Circular Economy in reaction engineering with/for society?" were discussed. Therefrom, a variety of ideas and suggestions were extracted. [ABSTRACT FROM AUTHOR]

The transformation of the current linear carbon economy to a circular carbon economy with chemical recycling of plastic waste and recirculation of domestic carbon resources is investigated using the example of petroleum‐based olefin production. The scenario‐based sustainability assessment shows the potential of chemical recycling to cover olefin production in Germany. With perspective 2050, the entire olefin production could be realized by coupling green e‐hydrogen with previously incinerated non‐fossil waste. [ABSTRACT FROM AUTHOR]

Copyright of Österreichische Wasser- und Abfallwirtschaft is the property of Springer Nature 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 BHM Berg- und Hüttenmännische Monatshefte is the property of Springer Nature 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.)

Das Vergrößern des Recyclingstroms erfordert einen neuen Ansatz, der über das Schmelzen und Umformen hinausgeht. Es gibt einige Techniken des chemischen Recyclings mit dem Potential, bestehende Recyclingmöglichkeiten zu ergänzen. In diesem Aufsatz sind die Methoden des chemischen Recyclings dargestellt und anhand einer Ökobilanz bewertet, ergänzt durch eine Aufzählung von Prozessen und Firmen in diesem Bereich. Wir zeigen, dass bestimmte Techniken besonders für spezifische Müllströme geeignet sind und dass nur eine Kombination aus den vorhandenen Methoden geeignet ist, das Kunststoffmüllproblem zu lösen. Aktuelle Forschung sollte realistischeren und weniger reinen Mischströmen größere Aufmerksamkeit widmen, während Trenn‐ und Sortierprozesse z. B. durch effektivere Regularien verbessert werden müssen. Dieser Aufsatz soll zur Entwicklung von Verfahren inspirieren, mit denen hochwertige Produkte hergestellt werden können, die die Kreislaufwirtschaft antreiben, indem sie nötige Wirtschaftsanreize und Erleichterungen für die Umwelt bieten. [ABSTRACT FROM AUTHOR]

Dissolution of growth and resource consumption – circular added value in timber constructionOur social responsibility towards our environment requires a fundamental rethinking in the construction industry. The construction methods so far have played a large part in ecological damage, such as pollution, loss of biodiversity and climate change. Environmentally compatible construction can be achieved by consequently adhering to efficient, consistent and sufficient construction methods. Building efficiently means saving resources and energy. Building consistently means building with environmentally compatible building products from renewable resources and in a circular economy. The dismantling of components and parts is essential for reusability. To build sufficiently means to forego resources through the intelligent use of buildings. Environmentally friendly construction is essentially waste avoidance through circular added value and thus the unbundling of growth and resource consumption. The implementation in building practice can only be achieved through the consistent cooperation of all those involved in the construction. The general conditions for this are to be specified by politics. Scientific research and economic developments of standardized, catalogued connections, building elements and components are essential for the success of waste prevention. On the basis of structural timber construction, the circular added value in the building industry is presented. [ABSTRACT FROM AUTHOR]

Copyright of BHM Berg- und Hüttenmännische Monatshefte is the property of Springer Nature 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.)