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

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetics of silicon micro-structure creation in dependence on hydrothermal conditions and type of used materials</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Waste forum

ISSN

1804-0195

e-ISSN

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Volume of the periodical

2018

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

476-483

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85059982071