Matt WillemsenFeb 3, 2024
https://www.sciencealert.com/we-finally-know-how-ancient-roman-concrete-was-able-to-last-thousands-of-years
https://www.sciencealert.com/we-finally-know-how-ancient-roman-concrete-was-able-to-last-thousands-of-years #roman #concrete #pozzolanic #SlakedLime #quicklime #HotMixing
We Finally Know How Ancient Roman Concrete Was Able to Last Thousands of Years

The ancient Romans were masters of building and engineering, perhaps most famously represented by the aqueducts.

ScienceAlert
GeekProjects NewsDec 6, 2023
Dry Ice from Seashells, the Hard (But Cheap) Way https://hackaday.com/2023/12/06/dry-ice-from-seashells-the-hard-but-cheap-way/ #calciumcabonate #chemistryhacks #carbondioxide #condensation #cryocooler #cryogenics #slakedlime #quicklime #dryice #co2
Dry Ice From Seashells, The Hard (But Cheap) Way

[Hyperspace Pirate] wants to make his own dry ice, but he wants it to be really, really cheap. So naturally, his first stop is… the beach? That’s right, the beach, because that’s …

Hackaday