Keywords
resistencia
película pasiva
concreto ternario
puzolanas
durabilidad
materiales
acero
concreto
corrosión
sistemas
indicadores
cemento portland polarization
resistance
passive film
ternary concrete
pozzolan
durability
materials
steel
concrete
corrosion
systems
indicators
portland cement
How to Cite
Abstract
This research work shows the contribution of supplementary cementitious materials (SCMs) in reducing the corrosion phenomenon in steel embedded in ternary concrete. Ternary steel-concrete systems were developed, consisting of AISI 1018 (AC) steel embedded in ternary concrete with a water/cement ratio of 0.45. Partial substitutions were made with respect to the mass of ordinary portland cement (OPC) by sugarcane bagasse ash (SCBA) and fly ash (FA) at 10, 20 and 30 %, the value of these percentages corresponds to 50 % CBCA and 50 % CV. The systems were evaluated with the electrochemical polarization resistance (Rp) technique, where corrosion current density (icorr) and corrosion velocity (Vcorr) were analyzed as indicators to evaluate corrosion phenomenon. The steel-concrete system with 20 % substitution (AC-CT20), decreased the Vcorr by 89 % with respect to the reference system (AC-REF). This result was attributed to the AC being in a passive state, which was associated with the passive film formation that was confirmed by the value of the mean icorr of 0.09 µA/cm2.
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