abstract
Geopolymerization is a viable way to process and re-use alumino-silicate industrial waste while producing high-strength, high chemical inertia materials that can effectively immobilize other industrial by-products, and even hazardous waste. In this study industrial waste from different stages of the manufacture of lightweight expanded clay aggregate was characterized for its possible transformation, via alkali activation, to geopolymers. The ultimate aim was to assess the possibility of using such geopolymers to develop thermal and acoustic insulation panels. The containment of hazardous materials is another important application for these new materials. Geopolymers were prepared for this study with different particles size distributions and activator concentrations. Their mechanical properties, composition and microstructure were characterized and a material with promising insulating properties was produced. A preliminary analysis was conducted of the salt formation observed in these geopolymers, the chief drawback to their use.
keywords
ALKALINE ACTIVATION; FLY ASHES
subject category
Construction & Building Technology; Materials Science
authors
Soares, P; Pinto, AT; Ferreira, VM; Labrincha, JA
our authors
João António Labrincha Baptista
Full professor
Victor Miguel Carneiro de Sousa Ferreira
Associate Professoracknowledgements
This study was supported by the Portuguese Centre Region Coordination and Development Commission's PRAI Programme.