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Pumpability of wet mixsprayed concrete with reduced clinker content

  • 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 .

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Metadaten
Author:Wolfgang KusterleORCiDGND, Maria ThumannGND
URL / DOI:https://betong.net/wp-content/uploads/8th-Sprayed-Concrete_Web-Proceedings.pdf
ISBN:978-82-8208-060-6
Parent Title (English):8th International Symposium on Sprayed Concrete : Modern Use of Wet Mix Sprayed Concrete for Underground Support, 11.- 14.06.2018, Trondheim, Norwegen
Editor:Thomas Beck, Synnøve A. Myren, Siri Engen
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2018
Release Date:2022/06/22
Institutes:Fakultät Bauingenieurwesen
Fakultät Bauingenieurwesen / Labor für Baustoffe
Begutachtungsstatus:peer-reviewed
research focus:Gebäude und Infrastruktur
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG