Abstract
Through a purely experimental approach, we proceed here to the description of the rheological behavior of the geopolymer matrices in the fresh state according to one or other of the parameters characterizing their formulation. This consolidates the different physicochemical techniques usually used for their characterization. This comes to allow us especially the definition of drafts for the implementation of empirical laws ensuring a better follow-up in the elaboration of these materials or even more optimization in their formulation. This description also allows us to follow the structural transition phenomena from the fresh state to the hardened state. We are particularly interested in demonstrating the impact of the addition of Phosphogypsum on the rheological behavior of geopolymers or on their kinetics of setting.
Highlights
In the field of materials sciences, several physicochemical techniques are used for their elaboration or their structural transition (Thermo gravimetric analysis, X-ray diffraction ...)
Other macroscopic analyzes are introduced, it is essentially the methods of description based on the rheological behavior of the fresh state of these materials when it exists [1] [2]
We consider the particular case of aluminosilicate powders activated by alkaline solutions based on sodium and charged with phosphogypsum; waste from the phosphate industry
Summary
In the field of materials sciences, several physicochemical techniques are used for their elaboration or their structural transition (Thermo gravimetric analysis, X-ray diffraction ...). Other macroscopic analyzes are introduced, it is essentially the methods of description based on the rheological behavior of the fresh state of these materials when it exists [1] [2] In this context and in the light of the literature, it should be noted that this approach is taking on an increasingly important dimension, notably through the consolidation of control protocols for the improvement of formulation and exploitation of the considered materials. This concerns in particular the field of building materials [3]. The emphasis is on the characterization of the effects due to alkaline activation on the one hand or the addition of phosphogypsum in the geopolymer matrix on the other hand
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