A study of the particle size effect on the pozzolanic activity of an equilibrium catalyst

Autor:	Jo Dweck, Jardel Pereira Gonçalves, Armando Lucas Cherem da Cunha, Mariana Santos Lemos, Sergio Meth
Rok vydání:	2011
Předmět:	Cement Thermogravimetric analysis Materials science Calcium hydroxide Condensed Matter Physics Fluid catalytic cracking Catalysis Thermogravimetry chemistry.chemical_compound chemistry Chemical engineering Particle size Physical and Theoretical Chemistry Composite material Pozzolanic activity
Zdroj:	Journal of Thermal Analysis and Calorimetry. 106:805-809
ISSN:	1572-8943 1388-6150
DOI:	10.1007/s10973-011-1399-7
Popis:	A study by thermogravimetry was done to evaluate the influence of the particle size on the pozzolanic activity of a residual equilibrium catalyst from a fluid catalytic cracking unit of a Brazilian refinery. For this purpose, cement type II pastes with the same substitution degree containing coarse, medium, and fine fractions of the residual catalyzer were evaluated after 28 days of setting. Using thermogravimetric and derivative thermogravimetric analysis, the contents of total combined water and calcium hydroxide were determined. Comparing the results on initial cement mass basis of each sample with those of a control paste without any residual catalyst addition, it can be seen that the coarse and medium fractions present similar pozzolanic activity and the fine one presents a higher activity than the others due to its specific area and composition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5fee6f073fb979ac322b94787de10fed https://doi.org/10.1007/s10973-011-1399-7 Zobrazit plný text záznamu Plný text ve formátu PDF