3 ms·
A boring topic that I'm excited/fascinated by: cement
- dekhn 7y agoA few observations: I was watching a documentary on building a Very Tall Building and the concrete pouring engineer (it's a thing) was standing up at 1000 feet directing the exact mix of cement to water, etc because that makes a huge difference in the strength, which matters a lot in 1000 foot buildings. Another: one of the very first steps in human tech history was "mine limestone" (see The Knowledge). So many things come from lime!
- rapnie 7y agoI find wood as a replacement for concrete - even for high-rise buildings - still more exciting, so I created a submission to showcase the subject: https://news.ycombinator.com/item?id=21359347 https://news.ycombinator.com/item?id=21359347