Features of structure formation of modified composition materials
DOI:
https://doi.org/10.15587/1729-4061.2015.48352Keywords:
composition material, clay, dolomite, hydrated compound, hardeningAbstract
A new method for producing a composition material based on low-grade clays and dolomite was developed. Its essence lies in the fact that the clay-dolomite composition material is made using ceramic technology but hardens as a binder in the subsequent hydraulic conditions. For producing clay-dolomite composition material, fusible clays of the Absheron deposit and dolomites of the Gobustan deposit are used.
The influence of various factors: the degradation kinetics of carbonates during firing, mineralizers, related phases in the rocks used, firing temperature and duration, hydraulic treatment duration, etc. on strengthening of clay-dolomite composition materials was found and their hardening mechanism was revealed. Calcium hydroxide, obtained during clay-dolomite mixture firing in the presence of smaller cations (Mg, Al) forms compounds, having binding properties, with Si2O5 radicals. Such calcium silicates have layered structures and become stable only in the presence of water.
It was found that the clay-dolomite composition materials gain sufficient strength after firing due to the formation of silicates, aluminum silicates and calcium and magnesium aluminates, which in their subsequent hardening in water conditions show binding properties, are hydrated to form hydrated compounds, leading to a significant increase in the composition strength.
References
- Mammadova, G., Ganbarov, D. M., Shirinzade, I. N. (2008). Solid-phase reactions in kaolinite-dolomite system. Journal of Chemical Problems, 4, 723–726.
- Shirinzade, N. A., Ganbarov, D. M., Shirinzade, I. N. (2009). Crystal-chemical characteristics of smectite clays and their dehydration. Azerbaijan Chemical Journal, 1, 131–134.
- Komov, V. M. (2004). Theoretical and technological principles of the production of large-size porous ceramics. Synopsis of dissertation of doctor of technical. Moscow, 48.
- Monastirov, A. V. (2009). Magnesian and dolomitic lime, its properties, production and use. Construction Materials, 9, 36–38.
- Melik Yeganova, T. B. (1956). The caustic dolomite based on local raw materials. Azerneshr, Baku, 113–123.
- Fataliyev, S. A. (2000). Reactivity of rocks and formation properties of building materials. Baku, 354.
- Vayvad, A. Y., Gofman, B. E., Carlson, K. P. (1958). Dolomite binders. Riga, 258.
- Garkavi, M. S. (2005). Thermodynamic analysis of structural transformations in binding systems. Magnitogorsk, 243.
- Mammadov, H. S. (1960). Hydrous silicates of calcium. Baku. Elm., 25.
- Tayler, H. F. (1986). Chemistry of cement hydration. Congressa international do gumica cementa. Rio de Janeiro, 82–110.
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