Determination of the pozzolanic activity of fluid catalytic cracking residue. Thermogravimetric analysis studies on FC3R-lime pastes

Journal Article · Tue Jul 01 04:00:00 EDT 2003 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(03)00014-0· OSTI ID:20658317

Paya, J; Monzo, J; Borrachero, M V; Velazquez, S; Bonilla, M

Spent fluid catalytic cracking catalyst (FC3R) from a petrol refinery played a pozzolanic role in portland cement system as revealed by previous experimental data. In the present study, the pozzolanic activity of FC3R was investigated by means thermogravimetry (TG) of cured lime-FC3R pastes. The influence of pozzolan/lime ratio on the pozzolanic activity was investigated. Due to the chemical composition of FC3R is similar to metakaolin (MK), and knowing that MK has a high pozzolanic activity, the latter was used as a material of comparison in this study. The scope of the study is the determination of the pozzolanic activity of FC3R and the evaluation of amount and nature of pozzolanic products. The products obtained from the reaction between FC3R components (SiO{sub 2}/Al{sub 2}O{sub 3}) and calcium hydroxide (CH) have been characterized, finding that the main pozzolanic reaction product was similar to hydrated gehlenite (calcium aluminosilicate hydrate) CSH and CAH were also formed in the reaction. FC3R showed higher pozzolanic reactivity than metakaolin, for low-lime content pastes and early curing age. Thermogravimetry, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) became very useful techniques for evaluation of reactivity.

• OSTI ID: 20658317
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 7 Vol. 33; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CALCIUM HYDROXIDES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL COMPOSITION
CURING
EXPERIMENTAL DATA
FLUIDS
FOURIER TRANSFORMATION
HYDRATES
HYDRATION
INFRARED SPECTRA
PORTLAND CEMENT
REACTIVITY
SCANNING ELECTRON MICROSCOPY
SILICA
SILICON OXIDES
SPECTROSCOPY
THERMAL GRAVIMETRIC ANALYSIS