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Evaluation of Corrosion Rate of Steel Rebars Embedded in Mortar Mixed with Triturated Tire Particles

Published online by Cambridge University Press:  13 November 2013

Claudia Berenice Flores Valdez ,
Francisco G. Pérez-Gutiérrez ,
Imelda Esparza Álvarez ,
Orlando Guarneros García  and
Sandra Luz Rodríguez Reyna
Claudia Berenice Flores Valdez
Affiliation:
Instituto de Metalurgia e Ingeniería de Materiales, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí (UASLP), México.
Francisco G. Pérez-Gutiérrez
Affiliation:
Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí (UASLP), México.
Imelda Esparza Álvarez
Affiliation:
Instituto de Metalurgia e Ingeniería de Materiales, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí (UASLP), México.
Orlando Guarneros García
Affiliation:
Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí (UASLP), México.
Sandra Luz Rodríguez Reyna
Affiliation:
Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí (UASLP), México.
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Abstract

Different materials, such as triturated waste tire (WT) particles, have been proposed as aggregate to improve mortar properties and reduce its cost in recent years. Using WT as aggregate implies material recycling, providing an environmental benefit. Previous studies show controversy on the chloride ion diffusion coefficient in mortar test specimens as a function of the WT content. The objective of this investigation is to evaluate the corrosion rate of steel reinforcement embedded in mortar specimens using WT as aggregate when exposed to chlorides. Electrochemical techniques, mercury intrusion porosimetry and scanning electron microscope were used to measure corrosion rate, porosity and microstructure of mortar matrix, respectively. Corrosion rate and porosimetry results were found to directly correlate for test pieces with 7.5% of WT compared with control samples and test pieces containing 5%, 10% of WT; such results are supported by visual inspection of steel reinforcements. Our results show that substituting 7.5% of sand with WT when preparing mortar provides the optimum protection.

Keywords

compositecorrosionpolymer
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1612: Symposium 4B – Concrete and Durability of Concrete Structures , 2013 , imrc2013-s4b-013
Copyright
Copyright © Materials Research Society 2013 

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References

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