Magnesium Refractory Concretes Based on Alkaline Binders with Enhanced Thermomechanical Properties
Ye. T. Boroday
Donbas National Academy of Civil Engineering and Architecture
Annotation: Alkaline binders of periclase and spinel compounds based on aqueous solutions of sodium silicates have been developed. Refractory mineral materials have been proposed as fillers and structure-forming components; the physic mechanical properties of the magnesium binder stone during heating have been investigated. It has been established that hardening of binders on the basis of periclase, closed with liquid glass, occurs as a result of the formation of Mg(OH)2 and a gel-like sodium-magnesium hydrosilicate, which ensures the hydrability of the binder stone. At average temperatures of 600…900 °С, the structure of amorphized hardening products of binders is ordered, and fillers are involved in the process of pericrisalization, which previously remained inert. The properties of refractory concretes on periclase aggregates on a spinel bundle with the use of dredged technical alumina as a high-alumina additive are investigated. It was established that concretes on a periclase bond are characterized by a low thermal resistance, which can be increased by 1.5–2,0 times with the use of a spinel bundle.
Keywords: refractory concretes, periclase, alumina, liquid glass.
Pages: 201-207.
Link for citation: Boroday, Ye. T. Magnesium Refractory Concretes Based on Alkaline Binders with Enhanced Thermomechanical Properties. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2018. – Vol. 14, N 4. – Р. 201-207. – URL: https://donnasa.ru/publish_house/journals/spgs/2018-4/04_boroday.pdf (date of access: 16.09.2024). (in Russian)
Vol. 14, N 4 (2018)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture