Open AccessROLE OF FE-BEARING COMPONENT IN PERLITE-BASED GEOPOLYMER WHEN STRUCTURAL AND PHASE TRANSFORMATIONS
Author(s) -
N. I. Kozhukhova,
I. Zhernovskaya,
A. V. Cherevatova,
Константин Соболев
Publication year - 2020
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/2071-7318-2020-5-2-126-133
Subject(s) - geopolymer , perlite , materials science , microstructure , composite material , phase (matter) , raw material , grinding , compressive strength , metallurgy , metal , chemistry , organic chemistry
Normally, the component composition of building materials makes a significant contribution when formation of final performance properties of them. Moreover, new types of binding systems, in spite of their poor knowledge, this effect on the structural characteristics of final composites also takes place. In this work, perlite-based geopolymer binder as an example, was studied.
In framework of the study, it was found that the application of grinding mill with a metal lining leads to the formation of Fe- milling yield, which is included into crushed raw materials (perlite) com-position.
It was established that the particles of the resulting Fe- component are nanoscaled.
The X-ray phase and chemical analyzes were used to determine the mechanism of the effect of the Fe- component on the properties of perlite-based geopolymer.
Microstructure of the hardened geopolymer paste were studied using SEM microscopy. Phase and mineral composition of geopolymer paste obtained by XRD-analysis showed, when the hardening process, nanosized iron hydroxide or bernalite Fe(OH)3(H2O)0.25 is formed in the geopolymer system, that is 5 times more than metallic iron. This is initiates the structure destruction and confirmed by the low values compressive strength of the geopolymer stone.
Keywords: Fe-bearing component, metallic milling yield, geopolymer binder, friable structure, the Scherrer formula