DEGRADATION OF A NEW CLINKER-FREE SULFOCALCIC BINDER 3C DUE TO FREEZING AND THAWING

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00381220" target="_blank" >RIV/68407700:21110/24:00381220 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

DEGRADATION OF A NEW CLINKER-FREE SULFOCALCIC BINDER 3C DUE TO FREEZING AND THAWING

Popis výsledku v původním jazyce

Due to today's global need to reduce CO2 emissions, there have been attempts to create new hydraulic binders with the potential to replace Portland cement in the future. Clays calcined in the range of 500-900 °C area promising low-emission source of pozzolans, which can significantly contribute to further reducing the impact on the environment. The combination of calcined clays with calcium sulfate and lime creates a new stable calcium sulfate hydraulic binder called 3C with suitable cement-like mechanical properties. However, for a new binder, it is necessary to observe its behavior in corrosion conditions, which are one of the most important properties for the construction industry. The aim of this project was to describe the behavior of the 3C binder under conditions of alternating freezing and thawing (FT) in the presence of water or chemical de-icing agents according to the ČSN EN 73 1326, Z1 standard. First, a set of slurries and mortars of the 3C binder with different ratios of components was prepared. A constant water to binder ratio as well as plasticizer addition were used. Cylindrical samples with a minimum height of 50 mm were prepared using polypropylene pipes with a diameter of 100 mm. After a month of curing, water or a 3% NaCl solution was poured onto the sample surface. Subsequently, the samples were cycled at alternating temperatures according to ČSN EN 73 1326, Z1. After every 25 FT cycles, the amount of surface waste was weighed. The selected samples were analyzed from the point of view of phase changes by the XRD method. The results were compared with reference cement samples prepared with the same water to binder ratio.

Název v anglickém jazyce

DEGRADATION OF A NEW CLINKER-FREE SULFOCALCIC BINDER 3C DUE TO FREEZING AND THAWING

Popis výsledku anglicky

Due to today's global need to reduce CO2 emissions, there have been attempts to create new hydraulic binders with the potential to replace Portland cement in the future. Clays calcined in the range of 500-900 °C area promising low-emission source of pozzolans, which can significantly contribute to further reducing the impact on the environment. The combination of calcined clays with calcium sulfate and lime creates a new stable calcium sulfate hydraulic binder called 3C with suitable cement-like mechanical properties. However, for a new binder, it is necessary to observe its behavior in corrosion conditions, which are one of the most important properties for the construction industry. The aim of this project was to describe the behavior of the 3C binder under conditions of alternating freezing and thawing (FT) in the presence of water or chemical de-icing agents according to the ČSN EN 73 1326, Z1 standard. First, a set of slurries and mortars of the 3C binder with different ratios of components was prepared. A constant water to binder ratio as well as plasticizer addition were used. Cylindrical samples with a minimum height of 50 mm were prepared using polypropylene pipes with a diameter of 100 mm. After a month of curing, water or a 3% NaCl solution was poured onto the sample surface. Subsequently, the samples were cycled at alternating temperatures according to ČSN EN 73 1326, Z1. After every 25 FT cycles, the amount of surface waste was weighed. The selected samples were analyzed from the point of view of phase changes by the XRD method. The results were compared with reference cement samples prepared with the same water to binder ratio.

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

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Book of abstracts of the 11th International Conference on Chemical Technology

ISBN

978-80-88214-48-9

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

125-129

Název nakladatele

AMCA spol. s r.o.

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

15. 4. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—