The Influence of Secondary Raw Materials on the Microstructure and Physical-Mechanical Properties of Autoclaved Aerated Concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU130431" target="_blank" >RIV/00216305:26110/18:PU130431 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.wasteforum.cz/cisla/WF_4_2018.pdf" target="_blank" >http://www.wasteforum.cz/cisla/WF_4_2018.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of Secondary Raw Materials on the Microstructure and Physical-Mechanical Properties of Autoclaved Aerated Concrete

Popis výsledku v původním jazyce

Using secondary raw materials is both eco-friendly and cost-effective. Great amounts of secondary raw materials are produced in the power industry by solid fuel combustion. There are two types of ashes, high temperature fly ash and fluidised bed combustion ash in this industry. As opposed to high temperature fly ash, the fluidised bed combustion ash generated by the more energy-efficient and modern combustion is still little used. High-temperature incineration also produces a slag beside fly ash, which has potential for use in aerated concrete. For this reason, research is focused on fluidised bed combustion fly ash, fluidised bed combustion bottom ash and slag. The aerated concrete composite was developed using a laboratory autoclave operating at 190 °C over a 7-hour holding time. The secondary raw materials amounted to 10 %, 30 %, and 50 % of the aerated concrete. While fresh, the mixtures were tested for rheologic properties by the flow table test. The results showed a dependence of rheological properties on the content of fluidised bed combustion fly and bottom ash. The research showed that a 10% content of secondary raw materials is to no detriment to physical properties. The influence of secondary raw materials on the microstructure was examined by X-ray diffraction analysis and compared to the peak intensity of the tobermorite which is the carrier of the autoclaved aerated concrete. The intensity peak of the sample with 10% admixture of fluidised bed combustion fly and bottom ash comparable to the reference sample and corresponded to the results of the physical properties.

Název v anglickém jazyce

The Influence of Secondary Raw Materials on the Microstructure and Physical-Mechanical Properties of Autoclaved Aerated Concrete

Popis výsledku anglicky

Using secondary raw materials is both eco-friendly and cost-effective. Great amounts of secondary raw materials are produced in the power industry by solid fuel combustion. There are two types of ashes, high temperature fly ash and fluidised bed combustion ash in this industry. As opposed to high temperature fly ash, the fluidised bed combustion ash generated by the more energy-efficient and modern combustion is still little used. High-temperature incineration also produces a slag beside fly ash, which has potential for use in aerated concrete. For this reason, research is focused on fluidised bed combustion fly ash, fluidised bed combustion bottom ash and slag. The aerated concrete composite was developed using a laboratory autoclave operating at 190 °C over a 7-hour holding time. The secondary raw materials amounted to 10 %, 30 %, and 50 % of the aerated concrete. While fresh, the mixtures were tested for rheologic properties by the flow table test. The results showed a dependence of rheological properties on the content of fluidised bed combustion fly and bottom ash. The research showed that a 10% content of secondary raw materials is to no detriment to physical properties. The influence of secondary raw materials on the microstructure was examined by X-ray diffraction analysis and compared to the peak intensity of the tobermorite which is the carrier of the autoclaved aerated concrete. The intensity peak of the sample with 10% admixture of fluidised bed combustion fly and bottom ash comparable to the reference sample and corresponded to the results of the physical properties.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetika tvorby mikrostruktury silikátů v závislosti na hydrotermálních podmínkách a typu vstupních surovin</a><br>

Návaznosti

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

Rok uplatnění

2018

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

2018

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

476-483

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85059982071