Title:
Spent Fluid Catalytic Cracking Catalyst for Improving Early Strength of Portland Cement
Author(s):
María V. Borrachero, José M. Monzó, Jordi Payá, Christian Vunda, Sergio Velázquez, and Lourdes Soriano
Publication:
Materials Journal
Volume:
111
Issue:
1
Appears on pages(s):
59-66
Keywords:
mechanical strength; pozzolan; spent fluid catalytic cracking catalyst; thermogravimetry
DOI:
10.14359/51686545
Date:
1/1/2014
Abstract:
Spent fluid catalytic cracking (FCC) catalyst from the petrol industry
has proven to be a very active pozzolanic material. This behavior
leads to an additional increase in the strength of the mortar that
contains this catalyst. Pozzolanic effects tend to be considered for
periods above three days, whereas in shorter times, the influence
of pozzolan is usually negligible. The reactivity of FCC is so high,
however, that both pozzolanic effects and acceleration of cement
hydration are evident in short curing times. This paper presents a
study of the effect of the presence of FCC on cement hydration and
the reaction products in the first 48 hours of curing time, carried
out by determining flexural and compressive strength of mortars
in three different tests (substitution, addition, and with accelerator).
For the FCC behavior comparison, limestone, mullite, and
andalusite were used. Finally, the characterization of hydrates was
performed by thermogravimetry.