Shotcrete using ternary binder made from coal combustion products: from lab tests to an application

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922568" target="_blank" >RIV/60461373:22310/21:43922568 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1757-899X/1205/1/012004" target="_blank" >http://dx.doi.org/10.1088/1757-899X/1205/1/012004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/1205/1/012004" target="_blank" >10.1088/1757-899X/1205/1/012004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Shotcrete using ternary binder made from coal combustion products: from lab tests to an application

Popis výsledku v původním jazyce

The paper presents a ternary binder development and its utilization in shotcrete. The binder is made from fuidized bed combustion (FBC) fy ash, siliceous fy ash, and Ca(OH)2 addition, now available under the name Sorfx. XRD and TGA identifed ettringite and C-S-H as two main hydration products. In addition, thermodynamic modeling verifed robustness in terms of space-flling capabilities when varying input oxide composition. Since alkali-free accelerators produce mostly ettringite in Portland-based systems, a fraction of Portland cement was advantageously replaced with the ternary binder, forming early ettringite as well. Extensive testing led to 45% replacement of Portland cement, following J2 curve for early strength gain used commonly in shotcrete tunnel linings. The shotcrete was successfully tested in a mock-up experiment in a 2 m3 batch. Primary lining of a newly built metro D in Prague served for the full-scale application, utilizing over 1000 tons of Sorfx and saving over 700 tons of CO2.

Název v anglickém jazyce

Shotcrete using ternary binder made from coal combustion products: from lab tests to an application

Popis výsledku anglicky

The paper presents a ternary binder development and its utilization in shotcrete. The binder is made from fuidized bed combustion (FBC) fy ash, siliceous fy ash, and Ca(OH)2 addition, now available under the name Sorfx. XRD and TGA identifed ettringite and C-S-H as two main hydration products. In addition, thermodynamic modeling verifed robustness in terms of space-flling capabilities when varying input oxide composition. Since alkali-free accelerators produce mostly ettringite in Portland-based systems, a fraction of Portland cement was advantageously replaced with the ternary binder, forming early ettringite as well. Extensive testing led to 45% replacement of Portland cement, following J2 curve for early strength gain used commonly in shotcrete tunnel linings. The shotcrete was successfully tested in a mock-up experiment in a 2 m3 batch. Primary lining of a newly built metro D in Prague served for the full-scale application, utilizing over 1000 tons of Sorfx and saving over 700 tons of CO2.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FW01010195" target="_blank" >FW01010195: Pokročilé výrobní technologie pro strategické využití a skladování vedlejších energetických produktů (VEP)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

IOP Conference Series: Materials Science and Engineering

ISBN

—

ISSN

1757-8981

e-ISSN

1757-899X

Počet stran výsledku

6

Strana od-do

012004

Název nakladatele

IOP Publishing

Místo vydání

Bristol

Místo konání akce

Telč

Datum konání akce

29. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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