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Why does a concrete recipe used in Roman harbour walls two millennia ago grow stronger in seawater, while modern reinforced concrete built to the same purpose crumbles inside 50 years?

Roman marine concrete keeps healing itself for two millennia through hot-mixed lime clasts, pozzolanic reactions with seawater, and slow calcite growth — while modern reinforced concrete fails within 50 years as steel rebar corrodes from chloride attack.

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The new frontier of exploration.

Mars Daily is an independent publication covering Mars missions, planetary science, rover discoveries, exploration technology, and the engineering behind every mission to the Red Planet. The site pairs a deep archive with current reporting on the research, agencies, companies, policy shifts, and technical breakthroughs shaping humanity's next destination. We employ modern AI technologies to support our editorial workflows; every published piece is editorially directed and reviewed.

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