MINERAL ADMIXTURES REACTIVITY DETERMINATION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925783" target="_blank" >RIV/60461373:22310/22:43925783 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/22:00364134

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

MINERAL ADMIXTURES REACTIVITY DETERMINATION

Popis výsledku v původním jazyce

Sustainability and new greening measures bring new challenges to the construction industry within the EuropeanUnion. Reducing CO2 emissions is forcing the market to find new ways and use new materials as admixturesin cement or concrete. Lower quality clays could undoubtedly be such materials. Fly ashes from co-combustionof biomass are also beginning to appear on the market. They have different composition and propertiescompared to conventional fly ashes. In addition, it cannot be forgotten that there is the potential use of powerplant bottom ashes. In this work, the pozzolanic activity and reactivity of various types of mineral admixtures,both traditional and new ones, were compared. The reactivity of the admixtures was determined using theFrattini test and the electrical conductivity test. The 8-day Frattini test proved the pozzolanic activity of all rawmaterials except for one sample of fly ash from biomass. The shortened 1-day Frattini test showed a differentreactivity of the materials after one day of hydration in comparison to 8-day Frattini test. Nevertheless, thequantitative agreement between the results of the 1-day Frattini test and the electrical conductivity test was notclearly demonstrated. It was further confirmed that the pozzolanic activity of the supplied substances isdetermined by their grain size as well.

Název v anglickém jazyce

MINERAL ADMIXTURES REACTIVITY DETERMINATION

Popis výsledku anglicky

Sustainability and new greening measures bring new challenges to the construction industry within the EuropeanUnion. Reducing CO2 emissions is forcing the market to find new ways and use new materials as admixturesin cement or concrete. Lower quality clays could undoubtedly be such materials. Fly ashes from co-combustionof biomass are also beginning to appear on the market. They have different composition and propertiescompared to conventional fly ashes. In addition, it cannot be forgotten that there is the potential use of powerplant bottom ashes. In this work, the pozzolanic activity and reactivity of various types of mineral admixtures,both traditional and new ones, were compared. The reactivity of the admixtures was determined using theFrattini test and the electrical conductivity test. The 8-day Frattini test proved the pozzolanic activity of all rawmaterials except for one sample of fly ash from biomass. The shortened 1-day Frattini test showed a differentreactivity of the materials after one day of hydration in comparison to 8-day Frattini test. Nevertheless, thequantitative agreement between the results of the 1-day Frattini test and the electrical conductivity test was notclearly demonstrated. It was further confirmed that the pozzolanic activity of the supplied substances isdetermined by their grain size as well.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil 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

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 9th International Conference on Chemical Technology

ISBN

978-80-88307-11-2

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

84-89

Název nakladatele

Czech Society of Industrial Chemistry

Místo vydání

Prague

Místo konání akce

Mikulov

Datum konání akce

25. 4. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—