Effect of sodium monofluorophosphate treatment on microstructure and frost salt scaling durability of slag cement paste

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2006.02.003· OSTI ID:20871566

Copuroglu, O ^[1]; Fraaij, A L.A. ^[2]; Bijen, J M.J.M. ^[2]

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1. Delft University of Technology, Faculty of CiTG, Micromechanics Laboratory (MICROLAB) (Netherlands)
2. Delft University of Technology, Faculty of CiTG, Materials Science and Sustainable Construction (Netherlands)

Sodium-monofluorophosphate (Na-MFP) is currently in use as a surface applied corrosion inhibitor in the concrete industry. Its basic mechanism is to protect the passive layer of the reinforcement steel against disruption due to carbonation. Carbonation is known as the most detrimental environmental effect on blast furnace slag cement (BFSC) concrete with respect to frost salt scaling. In this paper the effect of Na-MFP on the microstructure and frost salt scaling resistance of carbonated BFSC paste is presented. The results of electron microscopy, mercury intrusion porosimetry (MIP) and X-ray diffraction (XRD) are discussed. It is found that the treatment modifies the microstructure and improves the resistance of carbonated BFSC paste against frost salt attack.

• OSTI ID: 20871566
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 8 Vol. 36; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BLAST FURNACES
CEMENTS
CONCRETES
CORROSION INHIBITORS
ELECTRON MICROSCOPY
FLUORINE COMPOUNDS
FREEZING
FROST
MICROSTRUCTURE
PHOSPHATES
SODIUM COMPOUNDS
STEELS
THAWING
X-RAY DIFFRACTION