Ice abrasion testing of high performance concrete for offshore structures
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Offshore concrete structures exposed to drifting sea ice have abrasion of the concrete surface caused by the mechanical contact between ice and concrete in the order of 0.1 to 1 mm per year. The concrete-ice abrasion laboratory at NTNU, and results of our recent research of the laboratory simulation of concrete-ice abrasion, showed average abrasion depths of 0.01–0.35 mm for high-performance concrete after 3 kilometres of sliding ice, a severe-mild wear-transition, that abrasion is related to cutting of peaks, formation of valleys, aggregate protrusion by wear of ITZ. The strength – abrasion relation proposed by Huovinen was less clear due to the severe-mild transition. Key words: Concrete, ice, abrasion, ITZ, surface topography.