Structure development study of porous concrete with fluidized-bed combustion ash admixture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU126201" target="_blank" >RIV/00216305:26110/17:PU126201 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structure development study of porous concrete with fluidized-bed combustion ash admixture

Popis výsledku v původním jazyce

Because of its correlation between compressive strength and density, autoclaved aerated concrete (AAC) is a very suitable building material for many applications. Optimal macrostructure of the AAC skeleton is composed by small air pores. On the other hand, the well grown crystals of 11 Å tobermorite represent the most important part of the microstructure. The mineral is formed in hyper-alkaline, hydrothermal environment of the CaO – SiO2 – Al2O3 – H2O system. The main objective of this article is to study the influence of the fluidized bed combustion ash, as gypsum and partially lime alternative. Ground quartz sand, with an admixture of fluidized combustion ash, was used as the initial silica material. In order to reach the Ca/Si molar ratio of 0.73, the main silica sources were mixed together. As the instrument for the hydrothermal synthesis, carried out in the saturated steam environment at the pressure of 1.3 MPa and 185 °C for 12 hours, a laboratory autoclave was used. As the parameters determined to analyse physical-mechanical properties of the samples, density and compressive strength were chosen. X-ray diffraction method was used to observe the growth of the main mineralogical phases and scanning electron microscope (SEM) was used for crystal observation. From the results it is apparent that the fluidized bed combustion ash had a significant influence to tobermorite crystallization and formation.

Název v anglickém jazyce

Structure development study of porous concrete with fluidized-bed combustion ash admixture

Popis výsledku anglicky

Because of its correlation between compressive strength and density, autoclaved aerated concrete (AAC) is a very suitable building material for many applications. Optimal macrostructure of the AAC skeleton is composed by small air pores. On the other hand, the well grown crystals of 11 Å tobermorite represent the most important part of the microstructure. The mineral is formed in hyper-alkaline, hydrothermal environment of the CaO – SiO2 – Al2O3 – H2O system. The main objective of this article is to study the influence of the fluidized bed combustion ash, as gypsum and partially lime alternative. Ground quartz sand, with an admixture of fluidized combustion ash, was used as the initial silica material. In order to reach the Ca/Si molar ratio of 0.73, the main silica sources were mixed together. As the instrument for the hydrothermal synthesis, carried out in the saturated steam environment at the pressure of 1.3 MPa and 185 °C for 12 hours, a laboratory autoclave was used. As the parameters determined to analyse physical-mechanical properties of the samples, density and compressive strength were chosen. X-ray diffraction method was used to observe the growth of the main mineralogical phases and scanning electron microscope (SEM) was used for crystal observation. From the results it is apparent that the fluidized bed combustion ash had a significant influence to tobermorite crystallization and formation.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Waste forum

ISSN

1804-0195

e-ISSN

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Svazek periodika

2017

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

267-275

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85038614885