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%25 of WT compared with control samples and test pieces containing 5%25, 10%25 of WT; such results are supported by visual inspection of steel reinforcements. Our results show that substituting 7.5%25 of sand with WT when preparing mortar provides the optimum protection. Copyright © Materials Research Society 2013.

authors

• Flores Valdez C.B.
• Guarneros García Orlando
• Pérez Gutiérrez Francisco Gerardo
• Rodríguez Reyna Sandra Luz
• Álvarez I.E.

publication date

• 2013-01-01

published in

• Materials Research Society Symposium Proceedings  Proceedings

keywords

• composite; corrosion; polymer Agglomeration; Chlorine compounds; Composite materials; Concretes; Copyrights; Corrosion; Corrosion rate; Diffusion; Electrochemical corrosion; Mortar; Polymers; Reinforcement; Scanning electron microscopy; Chloride ion diffusion coefficient; Electrochemical techniques; Environmental benefits; Material recycling; Mercury intrusion porosimetry; Optimum protections; Steel reinforcements; Visual inspection; Aggregates

Digital Object Identifier (DOI)

• 10.1557/opl.2013.1128

start page

end page

volume

• 1612