Roman concrete is famous for its durability, lasting for thousands of years and seemingly stronger with each passing year. New research has uncovered the chemical processes responsible for the sturdiness of this ancient building material — a finding that could inspire modern engineers to revive this forgotten technique.
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In modern cities, there’s concrete at every turn. So it might surprise you to hear that, until now at least, we haven’t really understood how it works at the microscopic level — despite the fact that we trust it to build huge structures.