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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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • 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

  • 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