Influence of Nа2O Content on the Stone Structure Formation of Alkaline Binders in Magnesian Refractory Concretes on Periclase and Spinel Binding
Ye. T. Boroday
Donbas National Academy of Civil Engineering and Architecture
Annotation: Alkaline magnesia binders of periclase and spinel compositions based on aqueous solutions of sodium silicates are proposed. The influence of Nа2O content in alkaline binders on the processes of stone structure formation of binders is investigated. The temperature of deformation of the binderstone under load and the electrical conductivity of the binderstonein the temperature range of 20…1 400 °С, are determined. It was shown that heating above 550 °C causes a jump-like increase in the mobility of sodium cations of the binder matrix. This leads to ordering of the structure of amorphous products of binders, and also involves inert fillers in the recrystallization process. The interaction of these compounds with more refractory fillers leads to the formation of a ceramic binder from more refractory crystalline phases, which favors compaction, increased strength and reduced open porosity of the binder stone. The thermomechanical properties of concrete based on the proposed binders are determined.
Keywords: refractory concretes, periclase, spinel, liquid glass.
Pages: 33-39.
Link for citation: Boroday, Ye. T. Influence of Nа2O Content on the Stone Structure Formation of Alkaline Binders in Magnesian Refractory Concretes on Periclase and Spinel Binding. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2020. – Vol. 16, N 1. – Р. 33-39. – URL: https://donnasa.ru/publish_house/journals/spgs/2020-1/04_boroday.pdf (date of access: 16.09.2024). (in Russian)
Vol. 16, N 1 (2020)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture