This work aims to study the thermal behavior of basic-geopolymers derived from metakaolin (clay). The geopolymers were characterized by different techniques: analysis (DTA, TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and impedance spectroscopy. Some physicochemical properties products also determined: phases obtained after geopolymer heat treatment their electr...

A thermochemical representation of the Na-Al-Si-B-O system relevant for nuclear waste glass has been developed based on the associate species approach for the glass solution phase. Thermochemical data were assessed and associate species data determined for binary and ternary subsystems in the Na2O-Al2O3-B2O3-SiO2 system. Computed binary and ternary phase diagrams were compared to published diag...

Due to limited reserves of bauxite, nepheline can be used in the industrial production alumina Kazakhstan. The most promising deposit is syenites Kubasadyr deposit. Currently, there no effective technology for processing ores. High energy intensity, capital intensity and significant emissions into atmosphere are main drawbacks conventional ore by sintering method. Efficient hydrochemical requir...

ABSTRACT The weathering of some silicate minerals in crushed rocks may occur a few days cropping and generate different physicochemical properties, with potential benefits to tropical soils. This study aimed investigate the infuence maize (Zea mays L.) rhizosphere on products cation exchange capacity Mg-biotite from biotite schist Fe-biotite syenite. An experiment was carried out pots, so that ...