@incollection{LlanoTorreCavalaroKusterleetal., author = {Llano-Torre, Aitor and Cavalaro, Sergio H. P. and Kusterle, Wolfgang and Moro, Sandro and Zerbino, Ra{\´u}l L. and Gettu, Ravindra and Pauwels, Hans and Nishiwaki, Tomoya and Parmentier, Beno{\^i}t and Buratti, Nicola and Toledo Filho, Romildo D. and Charron, Jean-Philippe and Larive, Catherine and Boshoff, William P. and Bernard, E. Stefan and Kompatscher, Michael}, title = {Equipment and Procedure Description}, series = {Round-Robin Test on Creep Behaviour in Cracked Sections of FRC: Experimental Program, Results and Database Analysis : State-of-the-Art Report of the RILEM TC 261-CCF}, booktitle = {Round-Robin Test on Creep Behaviour in Cracked Sections of FRC: Experimental Program, Results and Database Analysis : State-of-the-Art Report of the RILEM TC 261-CCF}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-72736-9}, issn = {2213-2031}, doi = {10.1007/978-3-030-72736-9_5}, pages = {47 -- 117}, abstract = {This chapter collects the description of the main creep testing procedures in fibre-reinforced concrete (FRC) as well as the equipment used by each participant laboratory in the round-robin test (RRT). The description of each procedure was directly provided by the participants and follows the same structure for each participant where institution identification and contact information was included. Each participant summarised the most significant data such as specimen's size, load configuration, parameters or environmental conditions in a quite useful table. Moreover, the participants included description and close-up pictures of the creep frames construction, the support boundary conditions, and the measurement devices used. Finally, the participants provided a complete description of the specific complete creep test procedure followed.}, language = {en} } @inproceedings{Kusterle, author = {Kusterle, Wolfgang}, title = {Spritzbetonforschung f{\"u}r dauerhaftere und nachhaltigere Tunnels}, series = {4. Grazer Betonkolloquium (Beton Graz '18), 20.-21.09.2018}, booktitle = {4. Grazer Betonkolloquium (Beton Graz '18), 20.-21.09.2018}, language = {de} } @article{GalanBaldermannKusterleetal., author = {Galan, Isabel and Baldermann, Andre and Kusterle, Wolfgang and Dietzel, Martin and Mittermayr, Florian}, title = {Durability of shotcrete for underground support}, series = {Construction and building materials}, volume = {202}, journal = {Construction and building materials}, number = {March}, publisher = {Elsevier}, doi = {10.1016/j.conbuildmat.2018.12.151}, pages = {465 -- 493}, abstract = {Shotcrete is often used for the construction and stabilization of tunnels and other underground structures, where it is susceptible to different forms of physical and chemical attacks affecting its durability. An advanced understanding of the factors that limit the durability of shotcrete is crucial to develop tailored strategies for enhancing its service life. The main focus of this contribution is to shed light on the durability of shotcrete by revising the literature, highlighting what is missing and needs to be addressed, assessing how the knowledge about concrete durability can be transferred to shotcrete, and providing recommendations for durable shotcrete structures. (C) 2018 Elsevier Ltd. All rights reserved.}, language = {en} } @article{TestorKusterle, author = {Testor, Markus and Kusterle, Wolfgang}, title = {Ermittlung der Spritzbetondruckfestigkeiten - Modifiziertes Setzbolzenverfahren und Abh{\"a}ngigkeit der Druckfestigkeit von der Probek{\"o}rpergeometrie.}, series = {Zement + Beton}, volume = {98}, journal = {Zement + Beton}, number = {3}, publisher = {Zement und Beton Handels- und Werbeges.}, address = {Wien}, issn = {0514-2946}, pages = {20 -- 23}, language = {de} } @inproceedings{ParićKusterle, author = {Parić, I. and Kusterle, Wolfgang}, title = {Investigation, assessment and realtime readjustment of the rheological properties of SCC}, series = {SynerCrete'18 : Interdisciplinary Approaches for Cement-based Materials and Structural Concrete : Synergizing Expertise and Bridging Scales of Space and Time 24.-26. Oktober 2018, Funchal, Madeira Island, Portugal}, booktitle = {SynerCrete'18 : Interdisciplinary Approaches for Cement-based Materials and Structural Concrete : Synergizing Expertise and Bridging Scales of Space and Time 24.-26. Oktober 2018, Funchal, Madeira Island, Portugal}, editor = {Azenha, Miguel and Schlicke, Dirk and Benboudjema, Farid and Jędrzejewska, Agnieszka}, isbn = {978-2-35158-202-2}, pages = {255 -- 260}, abstract = {This paper discusses a new fresh concrete control system with the following structure: a rheometer measures the fresh concrete directly after the mixing process, during a short break. The viscosity and the dynamic yield point are determined by a ball rheometer. The rheological parameters viscosity and dynamic yield point describe the consistency and thus the pouring ability and consequently the quality of Self Compacting Concrete (SCC). Data collected from the measurement are the basis for an expert system which will help to readjust mixes with deviating rheology. Firstly, investigations were carried out during the development of different SCC mixtures in the COST TU 1404 Action. Secondly, investigations were done in two precast plants. A ball rheometer was installed in the respective mixers. The SCC for premium precast products was tested then during ongoing production. In addition, several test series were carried out in the laboratory of the OTH with the respective constitutive materials. During the test series, the mix designs of the well working SCC's were modified by using a deviating water content. Subsequently, using the rheological data, water, superplasticizer or stabilizing agents were added to the mix, trying to reach proper workability again. The graphs for the changing rheological properties as a function of the respective amount of start water content and additional water dosage or admixture dosage were generated and analyzed for the mixes of the two precast plants. With this information and experience, an expert system for the mix readjustment is currently under development.}, language = {en} } @article{SteindlSakoparnigBriendletal., author = {Steindl, Florian Roman and Sakoparnig, Marlene and Briendl, Lukas G. and Thumann, Maria and Galan, Isabel and Juhart, Joachim and R{\"o}ck, Rudolf and Saxer, Andreas and Mittermayr, Florian and Kusterle, Wolfgang}, title = {ASSpC - Vier Jahre Forschung f{\"u}r dauerhaften Spritzbeton}, series = {Bautechnik}, journal = {Bautechnik}, publisher = {Wilhelm Ernst \& Sohn}, address = {Berlin}, language = {de} } @article{ThumannChristlmeierHartmeieretal., author = {Thumann, Maria and Christlmeier, Peter and Hartmeier, Michael and Kusterle, Wolfgang}, title = {Reduzierung von versinterungsbedingten Reinigungsarbeiten in Tunneldr{\"a}nagen durch Optimierung der Spritzbetonrezeptur}, series = {Beton}, volume = {68}, journal = {Beton}, number = {11}, publisher = {VERLAG BAU + TECHNIK}, pages = {416 -- 421}, abstract = {Die Drainageleitungen in nicht druckwasserhaltenden Tunnelbauwerken haben die Aufgabe, anfallendes Bergwasser zu sammeln und aus dem Bauwerk zu f{\"u}hren. In den Leitungen treten h{\"a}ufig Kalkablagerungen, so genannte Versinterungen auf, die zu einem Teil- oder Vollverschluss der Rohre f{\"u}hren k{\"o}nnen und die Ableitung des Bergwassers be- bzw. verhindern. Zur Vermeidung von Sch{\"a}den am Tunnelbauwerk sind regelm{\"a}ßige und aufwendige Unterhaltsarbeiten notwendig. Ein wichtiger Einflussfaktor bei der Entstehung von Versinterungen ist der Kontakt des Bergwassers mit zementgebundenen Baustoffen, wie z. B. mit Spritzbeton. Aus dem Spritzbeton kann Calciumhydroxid ausgelaugt werden, das f{\"u}r den Korrosionsschutz der Bewehrung erforderlich ist, aber die Entstehung von Versinterungen beg{\"u}nstigen kann. Im Rahmen eines Forschungsprojekts wurden zahlreiche Mischungszusammensetzungen auf ihr Auslaugverhalten untersucht und Spritzbetonzusammensetzungen mit einem m{\"o}glichst geringen Versinterungspotenzial entwickelt.}, language = {de} } @article{DingKusterle, author = {Ding, Yining and Kusterle, Wolfgang}, title = {Bemessungsmodell f{\"u}r Stahlfaserbeton}, series = {Beton- und Stahlbetonbau}, volume = {95}, journal = {Beton- und Stahlbetonbau}, number = {4}, publisher = {Ernst \& Sohn}, issn = {1437-1006}, doi = {10.1002/best.200000390}, pages = {225 -- 231}, abstract = {Die Bemessungsrichtlinien f{\"u}r Stahlfaserbeton folgen je nach Land unterschiedlichen Ans{\"a}tzen. Generell kann festgehalten werden, daß das Niveau dieser Bemessungsrichtlinien i. d. R. nicht mit den entsprechenden Normen f{\"u}r Stahlbeton vergleichbar ist. Die Richtlinien erreichen oft nur den Stand von Empfehlungen. Da die Bemessungstheorie des Stahlfaserbetons weit hinter der praktischen Anwendung zur{\"u}ckliegt, bedeutet dies in der Praxis, daß der Stahlfaserbeton oft nur f{\"u}r Bauteile, deren Tragf{\"a}higkeit als untergeordnet betrachtet wird, zum Einsatz kommt. Eine gute Bemessungsgrundlage f{\"u}r Faserbetone findet sich im DBV-Merkblatt "Bemessungsgrundlagen f{\"u}r Stahlfaserbeton im Tunnelbau". F{\"u}r die praktische Anwendung ist sie jedoch etwas zu kompliziert. Der Beitrag stellt ein neues Bemessungsmodell vor, das auf den Ergebnissen zahlreicher Biegezugversuche beruht, die f{\"u}r den verwendeten Stahlfasertyp statistisch ausgewertet wurden.}, language = {de} } @article{KellerGreimKusterle, author = {Keller, Helena and Greim, Markus and Kusterle, Wolfgang}, title = {27th Conference and Workshop on Rheology of Building Materials, Ostbayerische Technische Hochschule (OTH) Regensburg, Germany, March 7 - 8, 2018}, series = {Applied Rheology}, volume = {28}, journal = {Applied Rheology}, number = {2}, publisher = {De Gruyter}, doi = {10.1515/arh-2018-0005}, pages = {56 -- 58}, language = {en} } @article{GreimKusterle, author = {Greim, Markus and Kusterle, Wolfgang}, title = {23rd Conference and Workshop Rheology of Building Materials. Ostbayerische Technische Hochschule Regensburg, Germany March 12-13, 2014}, series = {Applied Rheology}, volume = {24}, journal = {Applied Rheology}, number = {3}, publisher = {Kerschensteiner}, doi = {10.3933/ApplRheol-24-3-61}, pages = {61 -- 62}, language = {en} } @inproceedings{KusterleThumann, author = {Kusterle, Wolfgang and Thumann, Maria}, title = {Pumpability of wet mixsprayed concrete with reduced clinker content}, series = {8th International Symposium on Sprayed Concrete : Modern Use of Wet Mix Sprayed Concrete for Underground Support, 11.- 14.06.2018, Trondheim, Norwegen}, booktitle = {8th International Symposium on Sprayed Concrete : Modern Use of Wet Mix Sprayed Concrete for Underground Support, 11.- 14.06.2018, Trondheim, Norwegen}, editor = {Beck, Thomas and Myren, Synn{\o}ve A. and Engen, Siri}, isbn = {978-82-8208-060-6}, abstract = {The research project „Advanced and Sustainable Shotcrete - ASSpC" aims at the improvement of sprayed concrete mix design regarding durability and sustainability. One possible improvement is to replace part of the clinker content in the binder with different supplementary cementitious materials. It is crucial that new mix designs fulfil the basic technical requirements on site concerning workability and early age development, too. One central issue of the project is to investigate which parameters influence the pumpability of sprayed concrete. Several test methods are used to determine the stability, tendency to segregation, bleeding and of course the consistency of concrete. An essential test method is a concrete sliding pipe rheometer (Sliper). This rheometer determines the pumping characteristics of concrete in the laboratory and on construction site. In comparison to other rheometers, the Sliper evaluates the rheological characteristics of the thin layer of paste which is lubricating the wall of the convey ing pipe. The paper presents the tests procedures in detail as well as first results from lab-tests and from site-tests with different advanced shotcrete mix-designs .}, language = {en} } @inproceedings{PetscharnigKusterle, author = {Petscharnig, Florian and Kusterle, Wolfgang}, title = {Die neue {\"o}bv-Richtlinie - Schutzschichten f{\"u}r den erh{\"o}hten Brandschutz f{\"u}r unterirdische Verkehrsbauwerke}, series = {Spritzbeton-Tagung, 11.-12.01.2018 Alpbach, Tirol}, booktitle = {Spritzbeton-Tagung, 11.-12.01.2018 Alpbach, Tirol}, pages = {1 -- 13}, language = {de} } @inproceedings{ParicGreimErhardtetal., author = {Paric, Ivan and Greim, Markus and Erhardt, Markus and Weißmann, Horst and Kusterle, Wolfgang}, title = {Untersuchung, Beurteilung und zeitnahe Aussteuerung der rheologischen Frischbetoneigenschaften von SVB}, series = {Rheologische Messungen an Baustoffen 2018. Tagungsband zum 27. Workshop und Kolloquium, 7. und 8. M{\"a}rz an der OTH Regensburg}, booktitle = {Rheologische Messungen an Baustoffen 2018. Tagungsband zum 27. Workshop und Kolloquium, 7. und 8. M{\"a}rz an der OTH Regensburg}, number = {1. Auflage}, editor = {Kusterle, Wolfgang and Teubert, Oliver and Greim, Markus}, publisher = {tredition}, address = {Hamburg}, isbn = {978-3-7469-1878-5}, pages = {154 -- 168}, language = {de} }