Abstracts Book - IMRC 2018

• SE4-O017
STUDY OF CORROSION OF REINFORCING STEEL CONCRETE
EMBEDDED IN MIXTURES WITH ACTIVATED FLY ASH
Rosa Veronica Martínez Peréz 1 , Mariela Rendón Belmonte 2 , Miguel Martinez Madrid 2 , José
Trinidad Peréz Quiroz 2
1 Instituto Tecnológico de Querétaro, Ingeniería en Materiales, Mexico. 2 Instituto Mexicano del
Transporte, Materiales, Mexico.
Portland cement, the main hydraulic cement currently in use, is not only one of
the most demanding building materials in energy, but is also responsible for a
large amount of greenhouse gases. In addition to this, many structures,
especially those built in corrosive environments, show deterioration after 20 to
30 years even though they have been designed for more than 50 years of service
life. Currently, the use of materials that favor the reduction of CO2 emission and
improve durability properties is being promoted. A highly considered alternative
is the use of activated fly ash as a partial substitution material for ordinary
portland cement. This paper details the electrochemical behavior of mixtures
with portland cement and different substitution percentages of activated fly
ash, hydrated with water and cured according to the recommended procedure
for concrete conventional. Results of corrosion potential (Ecorr) and corrosion
rate (Vcorr), obtained the techniques of electrochemical potential measurement
and resistance to linear polarization (Rpl) respectively, are reported. Samples
and tests were performed according to ASTM standards. After ~ 200 days of
monitoring, the results show less deterioration of the reinforcement steel by
corrosion in the mixtures with fly ash content compared to the mixture made
with 100% portland cement.
Keywords: activated fly ash, corrosion, greenhouse gases
Presenting authors email: mbelmonte@imt.mx