Pore structure evaluation of cementing composites blended with coal by-products: Calcined coal gangue and coal fly ash

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27690%2F18%3A10241806" target="_blank" >RIV/61989100:27690/18:10241806 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0378382018313754?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378382018313754?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuproc.2018.09.013" target="_blank" >10.1016/j.fuproc.2018.09.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pore structure evaluation of cementing composites blended with coal by-products: Calcined coal gangue and coal fly ash

Popis výsledku v původním jazyce

Coal gangue (CG) and coal fly ash (FA) are the main coal by-product wastes. This paper focuses on the pore structure evaluation of CG and FA blended cementing composites with various replacement levels from 3 days up to 180 days. Results indicate that negative effect of coal by-products on the compressive strength and average pore size can be reduced to a negligible level at late ages. Similar average pore size (similar to 10 nm) and critical width (10-20 nm) are found for CG and FA composites after 90 days. Moreover, the blended composites have significantly higher gel pore fraction, and the higher the dosage the larger the gel pore fraction. Multi-fractal feature is observed with the fact that scale of micro-fractal region is found always broader than the macro-fractal region and the micro-D-s is found always larger than the macro-D-s. Both the micro- and macro-D-s of blended composites are systematically larger than the plain pastes.

Název v anglickém jazyce

Pore structure evaluation of cementing composites blended with coal by-products: Calcined coal gangue and coal fly ash

Popis výsledku anglicky

Coal gangue (CG) and coal fly ash (FA) are the main coal by-product wastes. This paper focuses on the pore structure evaluation of CG and FA blended cementing composites with various replacement levels from 3 days up to 180 days. Results indicate that negative effect of coal by-products on the compressive strength and average pore size can be reduced to a negligible level at late ages. Similar average pore size (similar to 10 nm) and critical width (10-20 nm) are found for CG and FA composites after 90 days. Moreover, the blended composites have significantly higher gel pore fraction, and the higher the dosage the larger the gel pore fraction. Multi-fractal feature is observed with the fact that scale of micro-fractal region is found always broader than the macro-fractal region and the micro-D-s is found always larger than the macro-D-s. Both the micro- and macro-D-s of blended composites are systematically larger than the plain pastes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Fuel Processing Technology

ISSN

0378-3820

e-ISSN

—

Svazek periodika

181

Číslo periodika v rámci svazku

181

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

75-90

Kód UT WoS článku

000449900500009

EID výsledku v databázi Scopus

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