Comparative investigation of corrosion resistance of steel reinforcement in alinite and Portland cement mortars

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(98)00072-6· OSTI ID:642130

Kostogloudis, G C; Kalogridis, D; Ftikos, C ^[1]; Malami, C; Georgali, B; Kaloidas, V ^[2]

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1. National Technical Univ., Athens (Greece)
2. Heracles General Cement Co., Athens (Greece)

The corrosion resistance of steel-reinforced mortar specimens made from alinite cement was investigated using ordinary Portland cement (OPC) specimens as reference. The specimens were prepared and exposed in three different environments: continuous exposure in tap water, interrupted exposure in tap water, and interrupted exposure in 3.5% NaCl solution. The steel weight loss and the half cell potential were measured vs. exposure time, up to the age of 12 months. Pore solution extraction and analysis and porosity determination were also performed. In continuous exposure in tap water, alinite cement provided adequate protection against corrosion. In interrupted exposure in tap water, a higher corrosion was observed for alinite cement compared to OPC. In the case of interrupted exposure in 3.5% NaCl solution, the simultaneous action of free chlorides and oxygen resulted in the depassivation of steel reinforcing bars in alinite and Portland cement mortars, and led to severe corrosion effect.

• OSTI ID: 642130
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 7 Vol. 28; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CEMENTS
CHLORIDES
CORRELATIONS
CORROSION RESISTANCE
OXYGEN
POROSITY
PORTLAND CEMENT
REINFORCED MATERIALS
STEELS
WATER