Effect of slag, silica fume, and finishing on the sorptivities of field concrete

For Canadian Standards Association C-2 exposure conditions (i.e., nonstructurally reinforced concrete exposed to chlorides and freezing and thawing) after 1 year, the effect of cement binder and finishing techniques on the capillary suction sorptivities of commercially batched and field-placed, cured, and finished concrete is reported. It was found that the addition of 40% ground granulated blast furnace slag or 8% silica fume is very effective in reducing sorptivities of field concrete. Furthermore, finishing techniques that do not overwork the surface assist in reducing sorptivities of field concrete.