Abstract:

Field experiments of anti-seawater corrosion concrete with a lot of slag have been carried out for 3 years in tidal region in order to investigate the efect of slag on the durability of the concrete.The experimental results in-dicate that,after 3-year immersion in tidal region,the depth of chloride ion penetration of the anti-seawater corro-sion concrete is only 13%~25%of that of the ordinary concrete,which means better anti-chloride ion ability of
the anti-seawater corosion concrete.It is also indicated that,considering the economic gains and durability,the suitable fineness of slag powder in the anti-seawater corosion concrete is 420～460 m²/kg,and that less binder is better to the concrete when the concrete compaction is good enough.

Key words: slag powder, concrete, seawater, chloride ion, corrosion