Building geopolymers for CuHe part I: thermal properties of raw materials as precursors for geopolymers

This paper presents the results obtained from the thermal analysis of a set of geomaterials (clays, pyroclastic materials, and industrial recycled materials) to be used as raw materials for the synthesis of geopolymers, specifically designed for the conservation of Cultural Heritage (CH) buildings, particularly in seismic hazard zones such as Sicily. X-ray diffraction and gas volumetric analysis (calcimetry) were applied to this set of raw materials in order to characterize the materials from the chemical and structural point of view. Thermogravimetric analysis (TG), TG coupled to Fourier transform infrared spectroscopy (TG-FTIR), and differential scanning calorimetry were used to characterize their thermal behavior. The statistical treatment of the thermogravimetric data by principal component analysis and hierarchical clustering analysis highlights the direct relation between the thermal data and the material composition that will be exploited for the selection of the best materials to obtain geopolymers specifically designed for the conservation of CH buildings.

Automated summary

This study conducted thermal analysis and structural characterization of a set of geomaterials for the synthesis of geopolymers designed for the conservation of Cultural Heritage buildings, especially in seismic hazard zones. Statistical treatment of the data highlighted the direct relation between thermal data and material composition, aiding in the selection of optimal materials.