Durability of blast-furnace slag mortars subjected to sodium monofluorophosphate application

✍ Scribed by K. Sisomphon; O. Çopuroğlu; A.L.A. Fraaij

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 924 KB
• Volume: 25
• Category: Article
• ISSN: 0950-0618
• DOI: 10.1016/j.conbuildmat.2009.09.010

✦ Synopsis

The aim of this study is to investigate the effect of sodium monofluorophosphate (Na-MFP) on frost scaling durability and transport properties of carbonated blast-furnace slag cement (BFSC) mortar. The application of Na-MFP solution as curing solution and also surface treatment compound for BFSC mortar was evaluated. Three different Na-MFP solutions with concentrations of 10%, 20% and 30% by weight. in water were used as curing solution and surface treatment compound. The experimental results reveal that both techniques significantly improve the frost salt scaling durability and microstructure of carbonated blastfurnace slag mortar. Moreover, the carbonation rate and capillary water uptake of the treated mortars were substantially decreased compared with the untreated specimen. The mortars cured in Na-MFP solution show higher compressive strength than the untreated control after carbonation exposure. In general, the durability performances were improved when increasing the concentration of the Na-MFP solution applied.