Factors affecting threshold chloride for reinforcement corrosion in concrete

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Cement and Concrete Research

DOI:https://doi.org/10.1016/0008-8846(95)00148-6· OSTI ID:116149

Hussain, S E ^[1]; Rasheeduzzafar,; Al-Musallam, A; Al-Gahtani, A S ^[2]

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1. Royal Commission for Jubail and Yanbu, Dhahran (Saudi Arabia)
2. King Fahd Univ., of Petroleum and Minerals, Dhahran (Saudi Arabia)

Three cements with variable C{sub 3}A contents were mixed with different levels of chloride, alkali and sulfate contents to study the effect of these parameters on pore solution composition. Effect of exposure temperature was also studied by curing the chloride-treated specimens at 20 and 70 C. Pore solution was extracted using a high pressure pore solution extrusion device and analyzed for chloride and hydroxyl ion concentrations. Threshold chloride for onset of reinforcement corrosion was computed using threshold [Cl{sup {minus}}/OH{sup {minus}}] ratio of 0.3. The results showed that C{sub 3}A content and exposure temperature have very strong influence on threshold chloride content. Alkali content of cement has marginal effect whereas presence of sulfates along with chlorides has moderate effect on the threshold chloride content.

• OSTI ID: 116149
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 7 Vol. 25; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALI METALS
CHEMICAL COMPOSITION
CHLORIDES
CORROSION
CORROSIVE EFFECTS
INTERFACES
PORE STRUCTURE
REINFORCED CONCRETE
STEELS
SULFATES
TEMPERATURE DEPENDENCE