Structural and phases changes of stone of alkaline binders of system Na2O – Al2O3 – SiO2 at hardening and heating
A. N. Yefremov
Donbas National Academy of Civil Engineering and Architecture
Annotation: It is set that temperature to 950 °C in the refractory system Al2O – SiO2 in presence 2–6 % Na2O formation of binder goes from alkaline aluminosilicates, crystallization of refractory phases begins, here a temporal ceramic binder consists of Na2O · Al2O3 · 6SiO2, Na2O · Al2O3 · 2SiO2, Na2O · Al2O3 or β – Al2O3. In the temperature interval of 1 000–1 200 °C alkaline aluminosilicates passes to fusion and role of ceramic crystalline binder passes to refractory connections forming of which began to melting of intermediate phases and is closed in the temperature interval of 1 200–1 400 °C. At a temperature higher a 1 200 °C ceramic binder consists of 3Al2O3 · 2SiO2, α – Al2O3, Na2O · Al2O3 or β – Al2O3. Regularity of influence of substance of Na2O on refractory property and deformation points on load of system Na2O – Al2O3 – SiO2 has been carried out during researches. This regularity allows to select cementing material compositions with fire properties which consistent with concrete filler properties at all. The results of researches can be used for production of refractories from wastes of ferrous and nonferrousmetals industry.
Keywords: refractory concretes on the basis of soluble silicates and aluminates of sodium, influencing 2–6 % Na2O on the mineralogenesis of the system Al2O–SiO2.
Pages: 189-196.
Link for citation: Yefremov, A. N. Structural and phases changes of stone of alkaline binders of system Na2O – Al2O3 – SiO2 at hardening and heating. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2012. – Vol. 8, N 4. – Р. 189-196. – URL: https://donnasa.ru/publish_house/journals/spgs/2012-4/04_efremov.pdf (date of access: 16.09.2024). (in Russian)
Vol. 8, N 4 (2012)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture