Towards the understanding of chloride profiles in marine exposed concrete, impact of leaching and moisture content

摘要: Abstract Cores drilled from three concrete beams submerged in sea water for 16 years at the South Western Norwegian coast were examined. The cast with different binders containing Portland cement and silica fume, fly ash or slag water-to-binder ratios (w/b) between 0.40 0.44. aim of study was to investigate whether binder composition would affect elemental changes caused by exposure thereby chloride ingress. No large differences observed. All concretes showed a 200–300 μm deep magnesium enriched zone negligible amounts sulphur chlorine surface. This followed (2–5 mm deep), which then again partially overlapped following (approximately 50 mm deep). For all concretes, moisture measurements that core not saturated, indicating self-desiccation low pore connectivity. absence considerable difference ingress investigated indicates either replacement levels are too have marked effect on chemistry, is mainly governed comparable physical properties i.e. porosity degree saturation.