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Enhanced durability of shotcrete – Reduced potential for precipitations

  • The contact of underground water with shotcrete leads to leaching of calcium hydroxide and can increase the precipitation of calcite in the secondary drainage system of tunnels under certain conditions. Indeed precipitations in the drainage pipes lead to high maintenance costs. Within a research project the leaching behavior of new and innovative binder compositions was tested in lab tests. One possible change in mix-design is the reduction in clinker content by using a lower amount of Ordinary Portland Cement together with cementitious materials. Successful combinations were further investigated in sprayed mortar and shotcrete tests to examine the influences of the spraying process and the addition of accelerator. The results indicate how shotcrete mix-design can be improved regarding its potential for precipitations and subsequently enhanced durability of shotcrete.

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Metadaten
Author:Maria ThumannGND, Wolfgang KusterleORCiDGND
ISBN:978-4-9909148-0-6
Parent Title (English):Proceedings of the 11th fib International PhD Symposium in Civil Engineering. - 29.-31.08.2016, Tokyo, Japan
Publisher:Technical University of Tokyo
Editor:Koichi Maekawa, Akio Kasuga, Jun Yamazaki
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2016
Release Date:2022/12/08
First Page:221
Last Page:228
Institutes:Fakultät Bauingenieurwesen
Fakultät Bauingenieurwesen / Labor für Baustoffe
research focus:Gebäude und Infrastruktur
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG