Ceramics-Silikáty 58, (3) 215 - 222 (2014) |
|
ROLE OF THE SYNTHESIS METHOD ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF METAKAOLIN-BASED POTASSIUM GEOPOLYMERS
|
Gao Xiaoxiao 1, Joussein Emmanuel 2, Michaud Philippe 1,
Rossignol Sylvie 1
|
1 Groupe d Etude des Matériaux Hétérogenes (GEMH-ENSCI) Ecole Nationale Supérieure de Céramique Industrielle,
12 rue Atlantis, 87068 Limoges Cedex, France
2 Université de Limoges, GRESE EA 4330, 123 avenue Albert Thomas, 87060 Limoges, France
|
Keywords: Temperature effect, Curing condition, Compressive strength, Alkaline solution, Microstructure, Synthesis
methodology
|
The synthesis method used has an important effect on the development of the compressive strength of a material. This work
aims to research the effect of synthesis temperature (30oC and 70oC), curing condition (dried and sealed curing) and alkaline
solutions (Sc commercial alkaline solution and Sl
laboratory alkaline solution) on the development of compressive strength.
The microstructure of these geopolymers was characterized using thermal analysis as well as porosity and microscopic
observations, and the results were discussed. The total porosity was found to play a negative role on the compressive strength.
Synthesis at a lower temperature demonstrated a better compressive strength due to the lower porosity and smaller pore
sizes. The Sl geopolymers showed a better compressive strength than the Sc geopolymers due to their lower porosity. It was
also found that the reaction was hindered when the samples were cured under a dried curing condition. |
 PDF (2.1 MB) |
|
