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Rust Wedge
Expanding rust is a force strong enough to shatter concrete.
Where: Koret Foundation Bay Walk
Rust is a major issue in waterfront buildings, as water enters cracks in masonry structures and rusts the underlying steel reinforcement. This exhibit shows the expansive force of rusting steel. A piece of iron placed in the cleft of a block of concrete is beginning to rust—it will expand over time and eventually fracture the block.
Collections:
Outdoor Exploratorium at Fort Mason
