Features of the synthesis of construction geopolymer composites

Use of clinker-free binders, such as geopolymers and various equivalents based on mineral additives, can significantly reduce the carbon footprint of the construction sector in the environment. The most promising and appropriate benchmark is the disposal of industrial waste of aluminosilicate oxide composition with subsequent mechanical and alkaline activation. For the first time, the microstructure of geopolymers based on aspiration cement dust and tuff has been comprehensively studied. The theoretical prerequisite for the creation of a binder system of such a concept is the synthesis of sufficiently strong and resistant to external manifestations of alkali metals, including the structures of frame aluminosilicates with a hidden crystalline structure. X-ray diffraction analysis of the obtained samples, as well as the results of scanning electron microscopy, electron dispersion spectrometry, differential-thermal analysis, ad infrared spectrometry confirm the presence in the geopolymer paste of products traditionally necessary for the hydration reaction: aqueous aluminosilicates, aluminates and silicates of sodium and calcium, quartz, calcite, feldspars similar to albite and orthoclase, micas, etc. The results obtained on the key results of the conducted studies confirm the high efficiency of the proposed technology and guarantee increased strength and durability of geopolymer concrete.

geopolymer, low-carbon footprint, man-made raw materials, clinker-free technology, activation, aspiration dust, structure