Calorimetric and thermal analysis studies on the influence of waste aluminosilicate catalyst on the hydration of fly ash–cement paste

• Published in: Journal of thermal analysis and calorimetry Vol. 116; no. 2; pp. 689 - 697
• Main Authors: Wilińska, Iwona, Pacewska, Barbara
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.05.2014; Springer
• Subjects: Aluminosilicates; Aluminum silicates; Analysis; Analytical Chemistry; Binders; Calorimetry; Catalysts; Cement; Cements; Chemistry; Chemistry and Materials Science; Hydration; Inorganic Chemistry; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Thermal analysis; Fly ash; Spent aluminosilicate catalyst; Hydration; Calorimetry; Activation; Thermal analysis; Portland cement
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-014-3749-8

Binders containing large amounts of cement substitutes have been a subject of interest for many years because of the possibility to reduce the amount of cement in concrete, and in consequence decrease negative influence of cement production on natural environment. In this work, studies related to hydration of binders where 80 % of cement was substituted by blended pozzolana were carried out. The aim of this work was to investigate activation of fly ash–cement system by addition of spent aluminosilicate catalyst, using calorimetry and thermal analysis as main methods of investigations. It was demonstrated that spent fine-grained fluidised catalytic cracking catalyst acts acceleratingly on early hydration of binder. It seems to be beneficial to use up to 10 mass% of this spent catalyst. Higher amounts may cause changes in the mechanism of early hydration. Because Ca(OH) 2 in such systems is quickly consumed due to pozzolanic reaction it seems beneficial to modify composition of binders by introducing additional amounts of Ca(OH) 2 or cement.