Repairing Bridges in Coastal Area with Ba Bearing Sulphoaluminate Cement

Abstract

In coastal areas, corrosion has been found in bridge piers made of Portland cement concrete. In an trail to protect the piers from further damages, Ba bearing sulphoaluminate cement concrete was tested as the repairing layers. It is showed that the Ba bearing sulphoaluminate cement concrete has a lower porosity and a more compact structure than Portland cement concrete under the same conditions, and consequently, better performances, such as high strength and corrosive resistance both in lab and real corrosive environments. Stimulating experiments indicate that Ba bearing sulphoaluminate cement is more suitable for repairing bridges in coastal area.

Effect of Iron Phase on Calcination and Properties of Barium Calcium Sulfoaluminate Cement

“…The main minerals of calcium barium sulfoaluminate cement are C 2.75 Ba 1.25 and β-C 2 S. It has the advantages of fast hardening, early strength, anti-corrosion and corrosion resistance, and it plays an important role in special engineering applications [ 1 , 2 , 3 , 4 , 5 , 6 ]. In addition, many researchers recognized that the iron phase in cement was a solid solution series with a composition in the range of C 2 F–C 6 A 2 F. Generally, C 2 F, C 6 AF 2 , C4AF and C 6 A 2 F are the representative minerals of this series.…”