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A comment on Forgetting the Asbestos: Or, how we lose knowledge and technologies.. Parent comment

Re:Forgetting the Asbestos: Or, how we lose knowledge and te... by larryliu on Monday October 24, 2022 @10:50PM (#33325589)
Roman concrete is simply concrete made by pozzolan cement. You make pozzolan cement by grinding quicklime together with volcano ash, fly ash from coal power plants, or metallurgical slags.
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Re:Forgetting the Asbestos: Or, how we lose knowledge and te... by grosswait on Monday October 24, 2022 @11:00PM (#33325656)
But the author’s point still stands. That knowledge was lost and then rediscovered.
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