ISSN: 0149-6123
Page Count: 8

Efficiency of Natural Greek Pozzolan in Chloride-Induced Corrosion of Steel Reinforcement
Batis, G
Assistant professor, assistant professor, and chemical engineer/post-graduate student, National Technical University, Materials Science and Engineering Section,

Kouloumbi, N
Assistant professor, assistant professor, and chemical engineer/post-graduate student, National Technical University, Materials Science and Engineering Section,

Pantazopoulou, P
Assistant professor, assistant professor, and chemical engineer/post-graduate student, National Technical University, Materials Science and Engineering Section,

Abstract

This experimental work estimates the corrosion behavior in a sodium-chloride environment of steel reinforcements in mortar specimens with 0, 15, and 30% Greek natural pozzolan, cured either for 1, 7, or 28 days. The corrosion resistance was evaluated by measuring the corrosion potential development of steel rebars, their gravimetric mass loss, their anodic potentio-dynamic behavior, and the total- and free-chloride content of the mortars. Additionally, their mineralogical composition was determined by X-ray diffraction (XRD) analysis. The increase of curing time, as well as the addition of the Greek natural pozzolan, for both percentages tested, improved the corrosion behavior. The combination of the pozzolan addition with longer curing time reduces the steel rebars mass loss up to a level of about 40% after five months of exposure.

Keywords:
chloride corrosion, steel reinforcement, natural pozzolan, curing time

Paper ID: CCA10332J
DOI: 10.1520/CCA10332J
ASTM International is a member of CrossRef.