Infrared spectroscopy study of structural nature of geopolymeric products

Abstract

The bonding status and chemical environment of SiO₄ and AlO₄ tetrahedras of three types of geopolymeric products were systematically investigated by infrared spectroscopy. The relationship between amorphous geopolymeric products and zeolite crystals with the same overall chemical compositions was also discussed. The infrared evidence shows that SiO₄ tetrahedra is partially bonded by AlO₄ during the hydration process of geopolymeric cement. The two types of tetrahedras jointly construct the three dimensional framework structures of the geopolymeric products. The mutual transformation between geopolymeric products and corresponding zeolite crystals will take place once the reaction condition is suitable, which reveals that the nature of geopolymeric products are probably the amorphous equivalent of the corresponding zeolite crystals.

Keywords

geopolymeric products / zeolite crystals / infrared analysis / microstructure

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