TY - GEN A1 - Schneider, M. A1 - Meng, Birgit T1 - Ressourcenschonung bei der Zementherstellung am Beispiel des Einsatzes von Hüttensand PY - 2002 SN - 3-7640-0426-6 SP - 10 EP - 14 PB - Verlag Bau + Technik CY - Düsseldorf AN - OPUS4-2069 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Schießl, P. A1 - Meng, Birgit A1 - Adam, G. A1 - Rößler, G. A1 - Schröder, P. A1 - Schwamborn, B. A1 - Wallner, B. A1 - Wiegrink, K. ED - Zilch, K. ED - Diederichs, C. J. T1 - Baustoffe PY - 2002 SN - 3-540-65760-6 IS - Kap. 3.1 SP - 3-3-3-60 PB - Springer CY - Berlin AN - OPUS4-2070 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kühne, Hans-Carsten A1 - Maultzsch, Matthias A1 - Wolff, L. A1 - Meng, Birgit A1 - Raupach, M. ED - Maultzsch, M. T1 - Long-term performance of surface protection systems for concrete T2 - 11th International Congress on Polymers in Concrete (ICPIC `04) CY - Berlin, Germany DA - 2004-06-02 KW - Surface protection system KW - Concrete KW - Weathering KW - Water uptake KW - Freezethaw resistance KW - Chloride ingress KW - Carbonation KW - Hydrophobic treatment PY - 2004 SN - 3-00-013706-8 SP - 417 EP - 428 PB - BAM CY - Berlin AN - OPUS4-3602 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kühne, Hans-Carsten A1 - Maier, Bärbel A1 - Maultzsch, Matthias A1 - Meng, Birgit A1 - Meinhold, Uwe T1 - Verification of the suitability of shotcrete on low strength concrete surfaces T2 - 10th International Conference on Durability of Building Materials and Components (DBMC) CY - Lyon, France DA - 2005-04-17 KW - Hydraulic engineering structures KW - Low strength concrete KW - Repair systems KW - Performance tests PY - 2005 SP - 8 pages CY - Lyon AN - OPUS4-7413 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Urs A1 - Fontana, Patrick A1 - Meng, Birgit T1 - BAM-Division VII.1 Building Materials: Main Expertise/NANOCEM Partner Project T2 - Nanocem Open meeting CY - Morges, Switzerland DA - 2005-04-29 PY - 2005 AN - OPUS4-7420 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Urs A1 - Pliett, H. A1 - Wenzel, F. A1 - Meng, Birgit T1 - A sustainable approach for the conservation of the Timur Shah Mausoleum in Kabul, Afghanistan T2 - 10th International Conference on Durability of Building Materials and Components (DBMC) CY - Lyon, France DA - 2005-04-17 PY - 2005 SP - 1 EP - 8(?) CY - Lyon AN - OPUS4-7411 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Fontana, Patrick A1 - Meng, Birgit A1 - Hillemeier, B. T1 - Frühe autogene Verformungen von HPC - Beurteilung des plastischen Schwindens und spannungsinduzierender Verformungen durch Korrelation mit der Hydratationskinetik N2 - Der Einfluß der Mischungszusammensetzungen auf das frühe autogene Schwinden der Bindemittelmatrix von Hochleistungsbetonen wurde durch Korrelation mit der Hydratationskinetik untersucht. Durch die Analyse der Verformungsgeschwindigkeiten konnte eine Unterscheidung zwischen plastischen und spannungsinduzierenden Verformungen vorgenommen werden. T2 - 45. Forschungskolloquium des DAfStb CY - Wien, Österreich DA - 06.10.2005 KW - Hochleistungsbeton KW - Autogenes Schwinden KW - Hydratation KW - Porenstruktur PY - 2005 SN - 0005-9900 SN - 1437-1006 VL - 100 SP - 57 EP - 60 PB - Ernst CY - Berlin AN - OPUS4-11177 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fontana, Patrick A1 - Meng, Birgit A1 - Habel, Wolfgang A1 - Wagenknecht, E. A1 - Hillemeier, B. T1 - Measurement of viscoelastic properties of cement pastes with oscillation rheometry T2 - 24th conference on Cement and Concrete Science CY - Warwick, England, UK DA - 2004-09-16 KW - Cement paste KW - Oscillation rheometry KW - Viscoelastic properties PY - 2004 SP - 1(?) EP - 4(?) AN - OPUS4-11178 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller, Urs A1 - Meng, Birgit A1 - Österle, Werner A1 - Gardei, André ED - Stark, J. T1 - Characterization of granulated blast furnace slag by means of the combined application of the FIB/TEM technique T2 - 16. Ibausil - Internationale Baustofftagung CY - Weimar, Germany DA - 2006-09-20 PY - 2006 SN - 3-00-018263-2 VL - 1 SP - 1-0189 - 1-0195 PB - Bauhaus-Univ. CY - Weimar AN - OPUS4-13717 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Meng, Birgit A1 - Weise, Frank A1 - Onel, Yener T1 - Feuchtemessung in kapillarporösen Baustoffen T2 - DAfStb Fachtagung "Betonbauten als Dichtkonstruktionen" CY - Berlin, Germany DA - 2004-03-12 PY - 2004 AN - OPUS4-5382 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Herbst, Tristan A1 - Meng, Birgit T1 - Ganzheitliche Eignungsbewertung potenzieller Recyclingwege für Mauerwerksrestmassen PY - 2013 SN - 978-3-433-03017-2 SN - 978-3-433-60296-6 SN - 0170-4958 VL - 38 IS - Kap. 2.2.6 SP - 637 EP - 641 PB - Ernst & Sohn AN - OPUS4-28564 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Huismann, Sven A1 - Weise, Frank A1 - Meng, Birgit A1 - Schneider, U. T1 - Transient strain of high strength concrete at elevated temperatures and the impact of polypropylene fibers N2 - This paper presents the results of an experimental study on the transient strain of high strength concrete (HSC) under heating up to 750 °C and the impact of polypropylene (PP) fibers. Concerning this topic only few results are available in the literature and systematic investigations are missing. However, basic knowledge is necessary for the understanding of the internal damage processes in the material as well as for heated structures. The transient strain during heating can be separated in two basic components: the free thermal strain and the mechanical strain. They were experimentally determined exemplarily for one HSC. For the determination of the mechanisms of transient strain and particularly the influence of PP fibers different techniques were applied. In this context the monitoring of the microcracking was done for the first time with acoustic emission analysis in combination with ultrasonic measurements. This new approach helps fundamentally to explain the impact of PP fibers on free thermal strain and mechanical strain during heating up. Furthermore weight loss measurements were carried out to characterize the moisture transport. It was shown that the PP fibers cause an acceleration of the moisture transport in the temperature range from 200 to 250 °C which leads to drying shrinkage in opposite direction to the free thermal strain. Hence this paper is a contribution to the general understanding of the impact of PP fibers in HSC at high temperatures and emphasizes the important influence of PP fibers on the thermal and mechanical induced strain of HSC. KW - High strength concrete KW - Polypropylene fibers KW - Elevated temperatures KW - Transient strain KW - Acoustic emission KW - Ultrasound PY - 2012 DO - https://doi.org/10.1617/s11527-011-9798-6 SN - 1359-5997 SN - 1871-6873 VL - 45 IS - 5 SP - 793 EP - 801 PB - Springer CY - Dordrecht AN - OPUS4-26029 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pistol, Klaus A1 - Weise, Frank A1 - Meng, Birgit T1 - Polypropylen-Fasern in Hochleistungsbetonen - Wirkungsmechanismen im Brandfall N2 - Bauteile bzw. Tragwerke aus Hochleistungsbetonen müssen in der Regel gegen brandinduzierte Abplatzungen mit geeigneten Maßnahmen geschützt werden, um einen ausreichenden Feuerwiderstand im Brandfall zu gewährleisten. Die bisher wirtschaftlich und technologisch sinnvollste Methode zur Verhinderung von explosionsartigen Betonabplatzungen im Brandfall ist die Zugabe von Polypropylen-Fasern. Die Wirksamkeit der Fasern konnte zwar empirisch gezeigt werden, es stellt sich allerdings die Frage, welche Mechanismen zur Verhinderung der Abplatzungen führen. Der vorliegende Beitrag fasst bisherige Theorien zur Wirkungsweise von Polypropylen-Fasern in brandbeanspruchten Hochleistungsbetonen zusammen und stellt eine innovative Methodologie zur Erforschung der mikrostrukturellen Prozesse vor. Die Ergebnisse zeigen, dass die nach dem Schmelzen und Zersetzen der Polypropylen-Fasern frei werdenden Mikrokanäle durch eine gleichzeitig einsetzende Mikrorissbildung netzartig verbunden werden. Die Mikrorissbildung ermöglicht somit den Abbau von Eigen- und Zwangsspannungen im Beton (mechanischer Effekt) und die Entstehung eines Transportwegesystems für den ausströmenden Wasserdampf (Permeationseffekt).--------------------------------------------------------------------------- Structural members and bearing structures of high performance concrete generally have to be protected against explosive spalling due to fire exposure to guarantee a sufficient fire resistance. Up to now, the economically and technologically most worthwhile method to prevent explosive spalling is the addition of polypropylene fibres. Though the effectiveness of the fibres could be shown empirically, the mechanisms preventing explosive spalling are still debatable. The present article summarizes the existing theories concerning the mode of action of polypropylene fibres in fire exposed high performance concretes and presents an innovative methodology for analysing the micro structural processes. The results show that due to the thermal decomposition of the polypropylene fibres micro channels are created and simultaneously connected due to a netlike micro crack formation. This enables the relief of internal stresses (mechanical effect) and the formation of a permeable transport system for the escaping water vapour (permeation effect). KW - Polypropylen-Fasern KW - Brandschutz KW - Structural fire protection KW - Computertomographie KW - Computed tomography KW - Hochleistungsbeton KW - High performance concrete KW - Messtechnik KW - Mikrorisse KW - Micro cracks KW - Polypropylen-Fasern KW - Polypropylene fibres KW - PP-Fasern KW - Prüfmethoden KW - Rasterelektronenmikroskopie KW - Scanning electron microscopy KW - Risse KW - Schallemissionsanalyse KW - Acoustic emission KW - UHPC KW - Baustoffe KW - Brandschutz KW - Versuche PY - 2012 DO - https://doi.org/10.1002/best.201200024 SN - 0005-9900 SN - 1437-1006 VL - 107 IS - 7 SP - 476 EP - 483 PB - Ernst CY - Berlin AN - OPUS4-26174 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Herbst, Tristan A1 - Rübner, Katrin A1 - Meng, Birgit A1 - Hauer, B. ED - Bager, D. H. ED - Silfwerbrand, J. T1 - Sustainable evaluation - concept to assess the applicability of secondary aggregates in concrete T2 - fib Symposium Stockholm 2012 'Concrete structures for a sustainable community' CY - Stockholm, Sweden DA - 2012-06-11 KW - Sustainability KW - Sustainable evaluation KW - Secondary aggregates KW - Concrete PY - 2012 SN - 978-91-980098-1-1 SP - 441 EP - 444 PB - Royal Institute of Technology CY - Stockholm AN - OPUS4-26316 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Herbst, Tristan A1 - Meng, Birgit A1 - Rübner, Katrin T1 - Ganzheitliche Eignungsbewertung von Sekundärrohstoffen für den Einsatz in Beton N2 - Der Einsatz von Sekundärrohstoffen im Betonbau kann einen wesentlichen Beitrag zu einer nachhaltigen Ressourcenwirtschaft im Bauwesen leisten. Sekundärrohstoffe (Recycling-Baustoffe, RC-Baustoffe) finden bereits Anwendung als Roh- bzw. Brennstoffe in der Portlandzementklinkerherstellung, als Zementbestandteile, als Betonzusatzstoffe sowie als sekundäre Gesteinskörnungen in Beton. In einem Teilprojekt des DAfStb/BMBF-Verbundforschungsvorhabens 'Nachhaltig Bauen mit Beton' wurde das Einsatzpotenzial von Sekundärrohstoffen in Beton untersucht. Hierbei spielen sowohl technische als auch ökologische und ökonomische Fragestellungen eine wichtige Rolle. Vor diesem Hintergrund wurde eine Bewertungsgrundlage mit ganzheitlicher Betrachtung von Nachhaltigkeitsaspekten (Technik, Ökologie, Ökonomie) ausgearbeitet. Dieses Bewertungskonzept umfasst die vier Bewertungsschritte: I. Grundsätzliche Überlegungen, II. Vorteile für das nachhaltige Bauen, III. Alternative Bewertungswege und IV. Sensitivitätsanalysen. Das Bewertungskonzept wurde am Beispiel der bereits im Betonbau eingesetzten rezyklierten Gesteinskörnungen entwickelt.---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Nowadays there are several applications of secondary mineral materials and residues. In the framework of the German research project 'Sustainable Building with Concrete', a concept to assess the applicability of already used and new secondary materials in concrete has been developed. It considers sustainability aspects and includes the following four assessment steps: I. Basic considerations, II. Advantages for sustainable construction, III. Alternative paths of application, and IV. Sensitivity analysis. Depending on changing technical, ecological and economic aspects, the assessment has to be performed for changed technical, ecological and economic conditions as necessity arises. KW - Nachhaltigkeit KW - Baustoffe KW - Betontechnologie KW - Sustainability KW - Sustainable evaluation KW - Holistic concept KW - Secondary materials KW - Secondary aggregates KW - Concrete KW - Allgemeines PY - 2012 DO - https://doi.org/10.1002/best.201200025 SN - 0005-9900 SN - 1437-1006 VL - 107 IS - 8 SP - 533 EP - 539 PB - Ernst CY - Berlin AN - OPUS4-26337 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Meng, Birgit A1 - Müller, Urs A1 - Garcia, O. A1 - Malaga, Katarina T1 - Performance of a new anti-graffiti agent used for immovable cultural heritage objects N2 - Cultural Heritage objects are in many cases invaluable and irrecoverable, therefore their protection is a prior goal. One threat arises by intentionally defacing such objects with graffiti. One possibility to face the imminent threat is the application of a surface protection in form of anti-graffiti systems (AGS). However, the knowledge about the performance and durability of AGS on substrates used for historical buildings is still fragmented. The goal of the presented study was to investigate the performance of a newly developed agent in comparison to a selection of commercial anti-graffiti agents on different substrates, which were used for historical buildings. Four commercial anti-graffiti agents with different chemical formulations were selected and tested with the new agent on different stone and brick substrates. The results showed clearly that AGS based on dense, water vapour impermeable coatings are not suitable to porous substrates such as sandstone, brick or porous limestone due to their impair of the hygric properties and the visual appearance of a substrate. The new agent could not completely reach the cleaning efficacy of the dense coatings but exhibited a much lower impact on the properties of the substrate and was therefore better compatible to historical surfaces. KW - Graffiti KW - Cultural Heritage KW - Anti-graffiti agent KW - Performance KW - Stone KW - Brick KW - Cleaning efficacy KW - Compatibility PY - 2014 DO - https://doi.org/10.1080/15583058.2012.747116 SN - 1558-3058 SN - 1558-3066 VL - 8 IS - 6 SP - 820 EP - 834 PB - Taylor & Francis CY - Philadelphia, Pa., USA AN - OPUS4-28605 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ramge, Peter A1 - Kühne, Hans-Carsten A1 - Meng, Birgit T1 - Repair mortars for the restoration and reprofiling of natural stone elements in cultural heritage N2 - For the protection of the world's cultural heritage the restoration of listed buildings and monuments is an important task. In many cases the need to repair and reprofile natural stone elements occurs. Repair mortars for such applications have to match historicocultural interests as well as durability related and constructive interests. Currently a research project dealing with the development and optimisation of such mortars is set up at the BAM. Special focus is laid on the possibility of a modular adaption to match a vast variety of stone properties. Besides the development and lab scale testing of the mortar system, an in-situ application will be planned and executed. T2 - EWCHP-2011 - European workshop on cultural heritage preservation CY - Berlin, Germany DA - 26.09.2011 KW - Repair mortar KW - Natural stone KW - Stone restoration KW - Stone reprofiling KW - Modular system KW - Listed buildings and monuments PY - 2011 SN - 978-3-8167-8560-6 SP - 281 EP - 288 AN - OPUS4-24561 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Herbst, Tristan A1 - Rübner, Katrin A1 - Meng, Birgit A1 - Hauer, B. T1 - Assessment concept for the sustainable use of secondary aggregates in concrete N2 - Nowadays there are several applications of mineral recycling materials and residues. At present an assessment method for the use of secondary raw materials, which considers sustainability aspects, does not exist. In the framework of the German DAfStb/BMBF research project 'Sustainable Building with Concrete' an assessment concept was developed. It includes the following four assessment steps: I. Basic considerations, II. Advantages for sustainable construction, III. Alternative paths for application, and IV. Sensitivity analysis. The concept was developed on the basis of recycled concrete aggregates, which are already used according to German standards. Afterwards, it was applied and verified by the evaluation of the utilisation of municipal solid waste incinerator bottom ashes. T2 - International RILEM conference on advances in construction materials through science and engineering CY - Hong Kong, China DA - 05.09.2011 KW - Sustainability KW - Assessment KW - Secondary aggregates KW - Concrete PY - 2011 SN - 978-2-35158-116-2 VL - PRO 79 IS - Chapter 10 / Study of sustainable use... SP - 1 EP - 8 PB - RILEM Publications AN - OPUS4-24564 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ramge, Peter A1 - Kühne, Hans-Carsten A1 - Meng, Birgit ED - Grantham, M. ED - Mechtcherine, V. ED - Schneck, U. T1 - Influence of selected aspects of the mixture proportioning on the performance of repair mortars T2 - Concrete solutions 2011 - 4th International conference on concrete repair CY - Dresden, Germany DA - 2011-09-26 KW - Repair mortar KW - Concrete rehabilitation KW - Repair systems KW - Polymer cement concrete (PCC) KW - Sprayed polymer cement concrete (SPCC) PY - 2012 SN - 978-0-415-61-622-5 SP - 451 EP - 459 PB - Taylor & Francis CY - London AN - OPUS4-24567 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fontana, Patrick A1 - Müller, Urs A1 - Meng, Birgit ED - Rogge, A. ED - Meng, B. T1 - Schädigungsmechanismen in Beton T2 - 52. DAfStb-Forschungskolloquium CY - Berlin, Deutschland DA - 2011-11-07 KW - Frost-Tausalz-Beanspruchung KW - Schrumpfrisse KW - Autogenes Schwinden KW - Plastisches Schwinden KW - Brand KW - Sulfatangriff KW - AKR PY - 2011 SN - 978-3-9814281-0-0 IS - D1 SP - 105 EP - 110 PB - BAM Bundesanstalt für Materialforschung und -prüfung CY - Berlin AN - OPUS4-25141 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -