Geopolymers
Inorganic polymeric new materials
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Dmitar Zorić
Dmitar Zorić
Faculty of Technology, Bulevar Cara Lazara 1, 21000, Novi Sad, Serbia
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Dušan Lazar
Dušan Lazar
Faculty of Sciences, Trg Dositeja Obradovica 3, 21000, Novi Sad, Serbia
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Ognjen Rudić
Ognjen Rudić
Faculty of Technology, Bulevar Cara Lazara 1, 21000, Novi Sad, Serbia
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Miroslava Radeka
Miroslava Radeka
Faculty of Technical Sciences, Trg Dositeja Obradovica 6, 21000, Novi Sad, Serbia
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Jonjaua Ranogajec
Jonjaua Ranogajec
Faculty of Technology, Bulevar Cara Lazara 1, 21000, Novi Sad, Serbia
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Helena Hiršenberger
Helena Hiršenberger
Faculty of Technical Sciences, Trg Dositeja Obradovica 6, 21000, Novi Sad, Serbia
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Abstract
The article presents the results of physical and chemical properties of lightweight aggregates (LWA) obtained by the thermal treatments of raw composition based on fly ash, supplied by electric plants from Serbia. The production process of LWA consists of raw material preparation, plastic shaping–extrusion, granulation, and thermal treatment at three temperatures: 1100, 1150, and 1200 °C. The final firing temperature (T = 1150 °C) is chosen based on the mechanical and physical properties of the designed aggregates. The particle-size distribution of the LWAs is unimodal (d ≈ 16 mm) while the density value varies from 0.98 to 1.99 g/cm3. The water absorption values are determined by use of two methods: 24 h of soaking in cold water and 5 h of boiling. The thermal conductivity of unbound, fired LWA particles is determined by measuring the amount of axially transferred heat in the stationary state. The obtained value of the LWA thermal conductivity (λ = 0.0872 W/mK, T = 1150 °C) is suitable for the production of structural concrete blocks with improved thermal insulating properties. Because of their high-porosity and -compressive strength values, the designed LWA could be used instead of the conventional aggregates in the production of concrete blocks. Consequently, a real valorization of the waste material such as fly ash in Serbia was established.
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| Journal of Thermal Analysis and Calorimetry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1969 |
| Volumes per Year |
1 |
| Issues per Year |
24 |
| Founder | Akadémiai Kiadó |
| Founder's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. |
| Publisher | Akadémiai Kiadó Springer Nature Switzerland AG |
| Publisher's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11. |
| Responsible Publisher |
Chief Executive Officer, Akadémiai Kiadó |
| ISSN | 1388-6150 (Print) |
| ISSN | 1588-2926 (Online) |
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Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
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