The new high-strength SN anchors offer easy handling resulting from a 44 % weight saving compared to conventional SN anchors with the same structural properties. In addition to the advantages in handling and occupational safety, consequential economic advantages can of course be mentioned such as lower freight costs, the option of reducing the borehole diameter, the possibility of parallel execution of various work steps and, finally, optimization of speed in conventional tunnelling.
Die neuen hochfesten SN-Anker bieten dem Anwender vor allem eine leichte Handhabung resultierend aus 44 %-Gewichtseinsparung verglichen zu konventionellen SN-Ankern bei gleichen statischen Eigenschaften. Neben den Vorteilen im Handling und im Arbeitsschutz sind natürlich auch die wirtschaftlichen Vorteile wie geringere Frachtkosten, möglicherweise die Reduzierung des Bohrlochdurchmessers, die Möglichkeit zur parallelen Ausführung verschiedener Arbeitsschritte und schließlich die Optimierung der Vortriebsgeschwindigkeit zu erwähnen.

In-depth contractor engagement during the concept and detailed design phases of the Bank Station Capacity Upgrade project led to an optimised tunnel design with significant improvements in risk management. Regular, coordinated meetings between the design and construction teams led to innovative construction solutions utilised in eliminating risks where possible and where not possible, controlling them through best practice. This paper outlines the lessons learnt from other tunnelling projects in London and presents how the risks related with SCL works have been dealt with in the tunnels design for the Bank Station Capacity Upgrade project.

Dywi-Drill Hollow Bar System - Approval for 100 Year Service Life in Germany - Dywi-Drill Hohlstab-System - Zulassung für 100 Jahre Nutzungsdauer als Dauerpfahl

Sandvik launches DT1132i tunnelling jumbo - Sandvik präsentiert den DT1132i Tunnelbohrwagen
55 years of BeMo Tunnelling - Successful since 1964 through highly motivated employees - 55 Jahre BeMo Tunnelling - Seit 1964 Erfolg durch hochmotivierte Mitarbeiter

Keine Kurzfassung verfügbar.

The exceptional apartment building project from HPA+ Architektur in Bergisch Gladbach has altogether six varied residential units in a total usable floor area of about 600 m2. Clay masonry units were chosen for the facade material of the three buildings, with detailed planning being necessary to enable the maintenance of all crossing, bed and head joints in all parts of the facade. Other materials in addition to clay masonry are exposed concrete and galvanised steel, which should give the most “rough” possible appearance. Another special feature of the project is the projecting gables, which are provided with insulation to the underside, resulting in a continuous external envelope. Further details: www.hpa.de (Photo: Detlef Podehl)

Keine Kurzfassung verfügbar.

Keine Kurzfassung verfügbar.

Life cycle assessments quantify the environmental impact of goods and services. Increasingly, their results should be used for variant comparisons in construction planning and procurement.
For the ecological assessment of wall building materials, this should not be limited to the assessment of the blocks, but the influence of insulation, plaster and mortar have to be taken into account as well. The considered wall should also fulfil predetermined properties such as a certain U-value.
The LCA data available today still do not permit any comparison of variants. For this, product-specific life cycle assessments/environmental product declarations would have to exist on the basis of uniform background data. Because the latter are being constantly developed and there are hardly any product-specific calculations, comparisons today are very inaccurate and subject to great uncertainties.

Multipor WI is a mineral-based interior insulation system with excellent insulation properties. It is dimensionally stable, vapor permeable, and nonflammable. In this paper the investigation of the processability and functionality of Multipor WI WLF 042 as an exterior insulation system is reported. On the campus of Technische Universität Kaiserslautern, a building was constructed with a new exterior insulation system of Multipor WI WLF 042, of 14 cm thickness. This insulation, which has so far only been used in the building interior, has a heat conductivity of &lgr; = 0.042 W/(mK) and a density of &rgr; = 90 kg/m3. Its thermal expansion coefficient is &agr; = 10-5/K and its specific heat capacity is c = 0.85 kJ/(kgK). It has a lower density and compression strength than Multipor mineral insulation boards for exterior use do.
Temperature sensors were implemented in different layers of the building envelope, both in undisturbed areas and at thermal bridges. The building will be monitored for several years. First heat transfer simulations of two thermal bridges of the building demonstrate the excellent insulation properties of WI WLF 042. The investigation of the processability and functionality of Multipor WI WLF 042 as an exterior insulation system is presented. First simulations show the excellent insulation properties of the insulation. The building will be monitored for several years to provide data about the processability and functionality of Multipor WI WLF 042 as an exterior insulation system.

In cooperation of Bremen Institute for Materials Testing (MPA Bremen), a Department of Leibniz Institute for Materials Engineering IWT, Bremen University of Applied Sciences and the Research Association RWB Bremen building products for masonry structures were developed on the basis of AAC rubble from C&D wastes. Granulates from processed AAC rubble were introduced as aggregates in dry premixed masonry mortars, in masonry blocks and lightweight building blocks and elements to replace completely natural aggregates. These recycling products exhibit beneficial technical properties, at the same time large volumes of AAC wastes may be re-used.
On the basis of the achieved R&D-results from laboratory experiments, trial batches of dry premixed mortar and masonry blocks were produced in the building materials industry on their available industrial equipment, minor adjustments in the mix composition were necessary. After a sufficient amount of dry premixed mortar and masonry blocks were produced, the recycling products were used to erect indoor masonry walls in a building project in Bremen.

The paper presents results of a series of 6 in-plane shear tests on storey-height clay unit masonry panels [1] with thin-layer mortar, carried out in addition to previous test campaigns [2], [3], and [4]. The walls were constructed with unfilled thermally insulating clay units with a thermal conductivity of &lgr; quals; 0.09 W/(m · K).
The current design rules for clay unit masonry according to DIN EN 1996-1-1/NA [5] are conservative compared to the presented test results for thermally insulating clay unit masonry.

The paper describes the results of testing six autoclaved aerated concrete (AAC) walls on a natural scale. The walls were made of 18 cm wide blocks and thin layer joints. Reinforced and non-reinforced walls were tested. Basalt grids and typical steel reinforcement (truss type) were used as reinforcements. The load was applied by a reinforced concrete rim beam. In the first part of the tests, the impact of the opening (window) on stress distribution and the load capacity of the wall was analysed. In the second part of the tests, the unequally loaded connection zone of perpendicular walls was analysed. The results were used to draw practical conclusions on rules of additional reinforcement of zones surrounding openings and connection zones of perpendicular walls.

The bond behaviour of a textile reinforced mortar (TRM) applied to autoclaved aerated concrete (AAC) masonry has been evaluated experimentally. The TRM is composed of a glass-fibre mesh combined with a cementitious mortar and is intended to strengthen AAC masonry walls subjected to out-of-plane bending during an earthquake. The main components have been characterized with preliminary tests. Then, pull-off and shear bond tests have been performed to determine the bonding properties of the TRM applied to the AAC substrate. Three types of AAC blocks have been used, which differ in the bulk density and compressive strength, to evaluate possible variation in the bond strength. The results of the experimental campaign have shown a good performance of the strengthening system. In most cases, the bonding between TRM and masonry was maintained up to tensile failure of the dry textile. As expected, the masonry samples realized using AAC blocks with a higher bulk density showed better performances. The paper presents and discusses main test results, providing background data for future recommendations for the use of the analysed strengthening system in AAC masonry structures.

Flat lintels are an often used and effective method of bridging over wall openings. They consist of a composite system of tension chord and the overlying masonry, which is only considered in regulations in this combined construction. The special features of the construction and design are explained in the present article through the example of aerated concrete flat lintels, with the verification of loadbearing capacity being described and explained based on the latest regulations in technical approvals taking into account the relevant European structural design codes and their national annexes.

The Fraunhofer Projekt BauCycle: Recycling of fine-grained construction rubble / Das Fraunhofer-Projekt BauCycle: Recycling von feinkörnigem Bauschutt
Foundation stone of Schloss Neuschwanstein found / Grundstein von Schloss Neuschwanstein gefunden

Enter for the Fritz Höger Prize 2020 now! / Jetzt bewerben beim Fritz-Höger-Preis 2020!
The 1st Prize in the Calcium Silicate Competition for young Architects “Conceptual Living 2018.19” goes to Stuttgart / Der 1. Preis im Kalksandstein Architektur-Nachwuchswettbewerb “Conceptional Living 2018.19” geht nach Stuttgart

Keine Kurzfassung verfügbar.

City Blocks - first international Hagemeister Brick Seminar in Moscow / City Blocks - Erstes ausländisches Hagemeister-Klinkerseminar in Moskau

Zum Titelbild
Stellio ist der aktuell wohl kostengünstigste Heliostat bezogen auf den solaren Ertrag. Durch die Regenschirm-Struktur sind die Lastpfade bei minimiertem Materialeinsatz verkürzt und die Deformationen reduziert. Außerdem verringert die rundliche Form die optischen Verluste durch gegenseitiges Verschatten (s. Beitrag auf S. 529). © Sebastian Weitbrecht/Timelapse-Video-Photo

Keine Kurzfassung verfügbar.

Keine Kurzfassung verfügbar.

Ab dem Jahr 2020 soll die Versorgung von Neubauten möglichst weitgehend unabhängig von fossilen Energieträgern erfolgen. Bei der Konzeption und Realisierung zukünftiger Neubauten werden neben der Senkung des Heizwärmebedarfs auch die Anlagentechnik und Beleuchtung sowie die Nutzung erneuerbarer Energien miteinbezogen werden müssen. Außerdem wird eine ganzheitliche Betrachtung, Bewertung und Optimierung hinsichtlich Energiebedarf und Energiebereitstellung notwendig. Sogenannte Plusenergiegebäude erzeugen dabei mehr Energie, als sie für ihren eigenen Bedarf im Jahresmittel benötigen. Durch Energiemanagement und -speicherung im Gebäude wird dabei zusätzlich eine weitere Entlastung der Energieversorgungsinfrastruktur angestrebt (Plusenergie 2.0).
Im Rahmen eines Forschungsprojekts, in einer Kooperation aus dem Lehr- und Forschungsgebiet Nachhaltigkeit im Metallleichtbau der RWTH Aachen, des Lehrgebiets Gebäudetechnik der FH Aachen sowie des Lehr- und Forschungsgebiets Architektur und Metallbau der FH Dortmund, sollen Lösungen für Plusenergiegebäude in Stahlleichtbauweise wissenschaftlich untersucht, erprobt und optimiert sowie Handlungsempfehlungen für zukunftsfähige Gebäudekonzepte abgeleitet werden. Neben der Optimierung der Gebäudehülle wird der Einsatz von einzelnen Stahllösungen, wie gebäudeintegrierter PV bzw. Solarthermie, stahlpfahlbasierter Geothermie sowie neuartiger Flächenheiz- und Kühlelemente aus Stahl, anhand konkreter architektonischer Entwürfe betrachtet und in experimentellen Untersuchungen sowie anhand eines parametrisierten Mustergebäudes erprobt. Als Projektergebnis entstehen ganzheitliche Plusenergiekonzepte für energetisch optimierte Gebäude in Stahlleichtbauweise.

Plus energy buildings 2.0 in lightweight steel constructions
From the year 2020 onwards, the supply of new buildings should be widely independent form fossil fuels. In the planning and realization of new buildings, the technical installations and lightning as well as the use of renewable energies will be considered in addition to the reduction of the heating demand. Besides a holistic examination, evaluation and optimisation considering energy demand and energy supply will be necessary. So called plus energy buildings are producing in a yearly average more energy than they need. With energy management and storage in the building, an additional relief of the energy supply structure can be achieved (plus energy 2.0).
In the context of a research project, in cooperation of the chair for Sustainable Metal Building Envelopes of the RWTH Aachen University, the Subject Area Building Services of the FH Aachen University of applied sciences and the Department of Architecture and Metal Construction of the FH Dortmund University of applied sciences and arts, solutions for plus energy buildings in lightweight steel constructions will be scientifically researched, proved, optimized and recommended procedures for future building concepts evolved. Besides of the optimization of the building envelop the use of steel solutions like building integrated PV or solar thermal energy, steel pile based geothermal energy as well as new steel panel heating and cooling devices will be considered with the use of a detailed architectural draft. Furthermore, it will be proved in experimental analyses and based on a parametric sample building. As a result of the project holistic plus energy concepts for energy optimized buildings in lightweight steel constructions will be created.

Solarthermische Kraftwerke mit ihren großen thermischen Speichern stellen elektrische Energie planbar und kostengünstig bereit. Die quadratkilometergroßen Kollektorfelder dieser Anlagen bestehen aus beweglichen Leichtbau-Stahlstrukturen, die Spiegelflächen so dem Lauf der Sonne nachführen, dass das konzentrierte Sonnenlicht in Wärme umgewandelt und einem Dampfkraftprozess zugeführt werden kann. Die Anforderungen an die Kollektoren bezüglich Kosten, Steifigkeit und Präzision definieren gemeinsam eine spannende Herausforderung für Ingenieure. Im Bericht wird das Funktionsprinzip der Kraftwerke und ihrer Kollektoren kurz vorgestellt. Am Beispiel zweier moderner Kollektoren - Parabolrinnenkollektor und Heliostat - wird die jeweilige Bauweise und ihre Besonderheiten erläutert werden.

Efficient steel structures for solar thermal power plants
Solar thermal power plants with their large thermal storage system provide dispatchable electric energy at low cost. Their collector fields extend over square kilometers. Collectors consist of light-weight steel structures tracking the sun in a way allowing conversion of concentrated solar radiation into heat to drive a steam power process. Requirements placed on the collectors in terms of costs, rigidity and precision jointly define an exciting challenge for engineers. The report briefly introduces the functional principle of these power plants and their collectors. Using the example of two modern collectors - parabolic trough collector and heliostat - the respective design and their special features are explained.

Im November 2018 wurde der neu errichtete Bau- und Gartenmarkt Hellweg in Fürstenfeld, Österreich, für die Kundinnen und Kunden eröffnet. Dieser Eröffnung gingen Monate voller Planung und der tatsächlichen Errichtung voraus. Die Themen der Nachhaltigkeit und des sozialen Engagements sind für die Bauherren wichtige Unternehmenswerte, die bei der Errichtung des Baumarkts unbedingt Berücksichtigung finden mussten. Eine weitere Herausforderung, die sich aus dem Standort ergab, stellte die Reglementierung im Bundesland Steiermark dar, nach welcher bei der Mindestanzahl an Stellplätzen eine Doppelbenutzung vorliegen muss. Um die Unternehmenswerte in den Bau der KundInnenparkplätze einfließen zu lassen und zudem die Reglementierung der Steiermark zu berücksichtigen, wurde nach ausführlicher Planung eine halbtransparente Horizontalverglasung aus Verbundsicherheitsglas (VSG) mit Solarzellen realisiert. Um nachhaltig Strom erzeugen zu können, wäre eine aufgeständerte Photovoltaikkonstruktion auf einem konventionellen Leichtdach ebenfalls infrage gekommen, jedoch fiel die Entscheidung aufgrund unterschiedlicher Gründe auf die transluzente Photovoltaikvariante.

Photovoltaic parking roof
The newly built DIY superstore and gardencenter Hellweg in Fürstenfeld, Austria was opened for customers in November 2018. This opening was preceded by months of planning and actual construction. The themes of sustainability and social commitment are important corporate values for the building developers which had to be taken into account in the construction of the building. A further challenge was the regulation in the federal state of Styria, according to which the minimum number of parking spaces requires double occupancy. In order to incorporate the corporate values into the construction of the customer parking lots and also take into account the regulations of Styria, a semi-transparent overhead photovoltaic system was implemented after extensive planning. In order to be able to generate sustainable electricity, an elevated photovoltaic construction could have been built on a conventional lightweight roof. It was decided to build a translucent photovoltaic option for various reasons.