4 ms·
Again? These Scientists must have the memory of goldfish - It seems like this is cracked every other month in the last 5 years or so
by blkhawk 9y ago
Again? These Scientists must have the memory of goldfish - It seems like this is cracked every other month in the last 5 years or so
- Baeocystin 9y agoSeriously. Pozzolans and hydraulic cements have been well understood for a very long time. https://en.wikipedia.org/wiki/Pozzolan https://en.wikipedia.org/wiki/Pozzolan