Abstracts Book - IMRC 2018

• SE2-P008
STUDY OF THE HYDRATION OF SULFOALUMINATE BELITIC
CEMENTS IN PARTIALLY BLENDED WITH BLAST FURNACE SLAG,
FLY ASH AND LIMESTONE
Amy Farías Sanabria 1 , Lauren Yolanda Gomez Zamorano 1
1 Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Mexico.
Portland cement (PC) is the most used material for construction purposes
worldwide and as a consequence the emissions of CO 2 caused by its production
has increased in the recent years; nowadays the PC industry produces around
7% of the anthropogenic CO 2 , mainly due to the high temperatures required for
its production and the decarbonization of the limestone, one of the fundamental
raw materials in the production of cement. Following that, and given that the
demand of PC increases per year, new alternatives have arisen to replace it, such
as low energy cements; among them, the calcium sulfoaluminate cements (CSA),
that could be processed at around 1200ºC, reducing the production
temperature in approximately 200°C, and with less percentage of limestone
than the PC requires, thus reducing CO 2 emissions. In view of the above, in this
work was evaluated the possibility to obtain a material that offers both
ecological and economic advantages that equals or exceeds the properties of
the PC, using CSA pastes with up to 50% supplementary cementitious materials,
such as ground granulated blast furnace slag, fly ash and limestone; where the
percentage of limestone was varied 10 to 20%. Samples were cured at room
temperature under lime saturated water. After 3, 7, 14 and 28 days of curing,
compressive strength was evaluated for all the samples studied. X-ray
Diffraction, Scanning Electron Microscopy and Fourier Transform Infrared
Spectroscopy were used to analyze the effect of the supplementary
cementitious materials on the microstructure and density of the hydration
products matrix.
Acknowledgment:
To the Mexican Society of Materials and the Materials Research Society for
organizing the International Materials Research Congress and giving us the
opportunity to exchange the knowledge and experiences acquired. To the
Autonomous University of Nuevo Leon (UANL), especially to the Faculty of
Mechanical and Electrical Engineering (FIME), for its excellent educational
program and for giving me the possibility of carrying out this study in its