Carbon dioxide integration into alkali aluminosilicate cement particles for achievement of improved properties. (20th September 2018)

• Record Type: Journal Article
• Authors: Matalkah, Faris; Soroushian, Parviz
• Is Part Of: Journal of cleaner production. Volume 196(2018)
• Page Start: 1478
• Page End: 1485
• Publication Date: 2018-09-20
• Subjects: CO2 uptake -- Metastable carbonates -- Alkali aluminosilicate -- Hydraulic cement -- Sustainability; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.06.186
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Alkali aluminosilicate cement developed using ground granulated blast furnace slag was produced mechanochemically in the presence of lime and sodium hydroxide. Processing of this cement in a carbon dioxide environment led to the incorporation of carbon dioxide into the resultant hydraulic cement as metastable carbonate complexes. The hydration reactions of cement were complemented with formation of crystalline carbonates; the resultant hydrates and carbonates made synergistic contributions towards the binding effects and stability of the inorganic binder. Analytical chemistry and physical test methods were performed on cements and their hydrates in order to understand the form of carbon dioxide in their corresponding structures. The test results indicated that carbon dioxide was integrated into the cement particles in metastable form, which formed carbonate crystallites integrated with the amorphous hydrates in the course of hydration of cement. This phenomenon led to significant improvements in the mechanical properties of the resulting binder. Graphical abstract: Image