Geopolymers
Inorganic polymeric new materials
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E. Kamseu
E. Kamseu
Department of Materials and Environmental Engineering, University of Modena and Reggio Emilia, Via Vignolese 905/A, 41125, Modena, Italy
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B. Ceron
B. Ceron
Department Werkstoffwissenschaften Lehrstuhl fur Glas Und Keramik, Universtat Erlangen-Nurnberg, Martensstr. 5, 91058, Erlangen, Germany
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H. Tobias
H. Tobias
Department Werkstoffwissenschaften Lehrstuhl fur Glas Und Keramik, Universtat Erlangen-Nurnberg, Martensstr. 5, 91058, Erlangen, Germany
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E. Leonelli
E. Leonelli
Department of Materials and Environmental Engineering, University of Modena and Reggio Emilia, Via Vignolese 905/A, 41125, Modena, Italy
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M. C. Bignozzi
M. C. Bignozzi
Department of Civil, Environmental and Materials Engineering, University of Bologna, Via Terracini 28, 40131, Bologna, Italy
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A. Muscio
A. Muscio
Department of Mechanical and Civil Engineering, University of Modena and Reggio Emilia, Via Vignolese 905/B, 41125, Modena, Italy
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A. Libbra
A. Libbra
Department of Mechanical and Civil Engineering, University of Modena and Reggio Emilia, Via Vignolese 905/B, 41125, Modena, Italy
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Abstract
Thermo physical behavior of metakaolin-based geopolymer materials was investigated. Five compositions of geopolymers were prepared with Si/Al from 1.23 to 2.42 using mix of sodium and potassium hydroxide (~7.5 M) as well as sodium silicate as activator. The products obtained were characterized after complete curing to constant weight at room temperature. The thermal diffusivity (2.5–4.5 × 10−7m2/s) and thermal conductivity (0.30–0.59 W/m K) were compared to that of existing insulating structural materials. The correlation between the thermal conductivity and parameters as porosity, pore size distribution, matrix strengthening, and microstructure was complex to define. However, the structure of the geopolymer matrix, typical porous amorphous network force conduction heat flux to travel through very tortuous routes consisting of a multiple of neighboring polysialate particles.
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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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