The Through-Dyed Autoclaved Silicate Concretes with the Use of Thermally Activated Iron Ore Raw Materials Refinement Tailings

Abstract:

The iron ore raw materials refinement waste is not virtually used after the wet magnetic separation and is accumulated in special hydraulic constructions – tailing dumps. This work considers the opportunity of using the heat-treated tailings as loading pigments for through-dyed autoclaved silicate concretes production. The heat-treated tailings were added to the raw mix instead of quartz sand. The concrete samples of light-pink shades of color were obtained. It has been demonstrated that the activation processes, taking place at heat treatment of tailings, as well as the influence of iron oxides acting as a mineralizer at high temperatures, create the increased imperfection of the quartz component’s structure. This increases the synthesis rate of new formations – the low-basic calcium silicate hydrates – and increases the strength properties of the samples with optimal compositions by 70-75% as compared to the control sample.

• Periodical: Solid State Phenomena (Volume 284)
• Pages: 1101-1106
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.284.1101
• Online since: October 2018
• Authors: Irina V. Starostina*
• Keywords: Ferruginous Quartzites Refinement Tailings, Loading Pigment, Low-Basic Calcium Silicate Hydrates, New Formations, Strength Properties, Water Absorption

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