The influence of the waste foundry sand on the microstructure and the physico-mechanical properties of autoclaved aerated concrete

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU135074" target="_blank" >RIV/00216305:26110/20:PU135074 - isvavai.cz</a>

Result on the web

<a href="https://www.scientific.net/MSF.998.293" target="_blank" >https://www.scientific.net/MSF.998.293</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.998.293" target="_blank" >10.4028/www.scientific.net/MSF.998.293</a>

Result language

angličtina

Original language name

The influence of the waste foundry sand on the microstructure and the physico-mechanical properties of autoclaved aerated concrete

Original language description

Thanks to its porous structure the autoclaved aerated concrete has excellent thermal insulation properties. The production of this building material is carried out in two main steps. At first calcium hydroxide reacts with aluminum powder. This reaction releases hydrogen which creates the porous structure. Secondly lime reacts with siliceous components under hydrothermal conditions. This reaction forms crystalline calcium hydrosilicates which represent a binder component in the material. Focus of this paper is to study the degree of crystallization of calcium hydrosilicates depending on the quantity and fineness of the admixture of the waste foundry sand. This material was tested in three different values of specific surface. The influence of granularity of the waste foundry sand on the microstructure and physical-mechanical properties of the autoclaved aerated concrete was monitored. At the same time, the influence primary filler substitution by foundry sand was also observed.The substitution was realized in amounts of 10%, 30% and 50%. As the final step the influence of the waste foundry sand admixture on the autoclaved aerated concrete porous structure was evaluated. The microstructure was analyzed by X-ray diffraction. Obtained values show that admixture of waste foundry sand has positive effect on the crystallisation of calcium hydosilicate phases. Substitution of primary filler by waste foundry sand is possible up to 50%. With a higher amount of substitution, the higher values of compressive strength of autoclaved aerated concrete were monitored.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20501 - Materials 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

2020

Confidentiality

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

Article name in the collection

8th International Conference on Material Science and Engineering Technology, ICMSET 2019

ISBN

978-3-0357-1606-1

ISSN

0255-5476

e-ISSN

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Number of pages

6

Pages from-to

293-298

Publisher name

Neuveden

Place of publication

Switzerland

Event location

Singapore

Event date

Oct 19, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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