Comparison of thermal properties of foamed geopolymer materials based on fly ash and metakaolin / Agnieszka Bąk, Kinga Pławecka, Michał Łach // W: IV. International Turkic World Congress on Science ... więcej

Comparison of thermal properties of foamed geopolymer materials based on fly ash and metakaolin / Agnieszka Bąk, Kinga Pławecka, Michał Łach // W: IV. International Turkic World Congress on Science and Engineering TURK-COSE 2022, 23-24 June 2022, Niğde - Türkiye : book of proceedings [Dokument elektroniczny] / eds. Murat Barut [et al.] ; org. by Niğde Ömer Halisdemir University. Türkiye, L.N. Gumilyov Eurasian National University. Kazakhstan, Kyrgyz-Turkish Manas University. Kyrgyzstan. – Niğde : Niğde Ömer Halisdemir University, 2022. – S. 366-371 : schem., tab., wykr. – Tryb dostępu: http://turk-cose.ohu.edu.tr/pdf/22/bookofproceedings.pdf. – Bibliogr. s. [370-371], Abstr. – ISBN 978-975-8062-46-1

The aim of the presented work was to study the insulation properties thermal conductivity coefficient [λ] and specific heat Cp of foamed geopolymer plates. The paper presents the results of tests on geopolymers ... więcej

The aim of the presented work was to study the insulation properties thermal conductivity coefficient [λ] and specific heat Cp of foamed geopolymer plates. The paper presents the results of tests on geopolymers based on fly ash and metakaolin with the addition of ash microspheres. The geopolymer composites were prepared using hydrogen peroxide H2O2 and stabilizers in the form of Portland cement and surfactant. The curing process of geopolymer foams was carried out at 60°C. The obtained sheets were subjected to thermal conductivity tests in the temperature range 0-20°C, and the specific heat was examined in the range 27.532.5°C. The density results of the tested foamed geopolymer slabs are also presented in this paper, and the visual evaluation and morphology of the porous structure are presented using scanning electron microscopy. As a result, the foamed fly ash-based geopolymer composites were found to have a lambda coefficient value of 0.07 [W/m*K], and their average specific heat over a given temperature range was 1.807 [kJ/kg*K]. The thermal parameters for the metakaolin-based samples are 0.09-0.10 [W/m*K], and their average specific heat is 1.390 [kJ/kg*K]. Based on the test results, it can be concluded that fly ash is a better and more easily controllable base material in the foaming process. The obtained test results allow these materials to be used in construction as insulation materials due to the fact that they have relatively good insulation parameters.