Implementation of the ternary binder in shotcrete during the construction of the metro tunnel in Prague, Czech Republic
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00343851" target="_blank" >RIV/68407700:21110/20:00343851 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.2495/HPSM200171" target="_blank" >https://doi.org/10.2495/HPSM200171</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2495/HPSM200171" target="_blank" >10.2495/HPSM200171</a>
Alternative languages
Result language
angličtina
Original language name
Implementation of the ternary binder in shotcrete during the construction of the metro tunnel in Prague, Czech Republic
Original language description
This paper summarizes recent achievements in shotcrete utilizing ternary binder. Ternary binder is composed mainly from fly ashes and, during hydration, produces large volumes of ettringite beneficial for early-strength gain in shotcrete. Savings in mineral resources, utilization of by-products and reduction in clinker consumption are seen as key benefits for the implemented solution. Design of ternary binder is discussed, including thermodynamical modelling and evolution of volume fractions in the binder. Ternary binder showed high stability with regards to input oxide variations, naturally occurring in heterogeneous fly ash production. Based on the results, a mock-up experiment was performed to verify the effectiveness of ternary binder in shotcrete with excellent results. Approximately 20 tons of the ternary binder is weekly consumed in the pilot project of metro D in Prague. Shotcrete serves as a temporary primary lining in the new Austrian tunnelling method. Substitute for cement in the form of ternary binder reached 50% for concrete strength class C25/30, following J2 curve strength gain.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/TH02010206" target="_blank" >TH02010206: Significant economic and material savings in the construction of underground line structures due to incorporating fly ash and secondary waste into the concrete tunnel lining</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
WIT Transactions on the Built Environment
ISBN
978-1-78466-389-6
ISSN
1746-4498
e-ISSN
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Number of pages
7
Pages from-to
161-167
Publisher name
WIT PRESS
Place of publication
Wessex
Event location
Prague
Event date
Sep 2, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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