Abstract
The fluidized-bed catalytic cracking catalyst (FCC) it is a residue from the industry of the petroleum that shows a high pozzolanic reactivity and, in cementing matrix, it significantly improves their mechanical behaviour as well as durability. In this research a comparative study on residues of catalyst from different sources has been carried out, in order to know if these residues can be used jointly in an indiscriminate way or, on the contrary, it is necessary to classify them according to their characteristics. Thus, a study on five different FCC residues, supplied from different companies, has been carried out, and their physical-chemical characteristics, pozzolanic reactivity by means of thermogravimetric analysis and the evolution of the mechanical strength of mortars were studied. After analyzing all the aspects, it can be concluded that no significant differences among the different tested catalysts were found.
Highlights
The industry of the construction takes several decades incorporating the use of cementing and pozzolanic materials to obtain mainly more economic, more ecological and better performance binders
The physical-chemical and catalytic characteristics of the fluidized-bed catalytic cracking catalysts (FCC) catalyst depend on the supplier company and on the industrial plant, and differences among the behaviour of catalyst residues would be found depending on the reactor (7-8)
Its physical-chemical characteristics and its silicoaluminous composition let to think that it could act as a pozzolan and, to be a very active pozzolan (10)
Summary
The industry of the construction takes several decades incorporating the use of cementing and pozzolanic materials to obtain mainly more economic, more ecological and better performance binders. Numerous studies carried out by several research groups have confirmed that the FCC acts like an active pozzolan from early ages of curing and enhances the mechanical behavior and the durability of pastes, mortars or concretes that contain FCC (11-16). In whole these papers, only one selected residue from an industrial plant was studied in each research, different among the different research groups
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