THE VIDEO SHELF · concrete and civil engineering
What is Concrete?
Practical Engineering gives a short introduction to concrete, covering the difference between concrete and cement, the ingredients, and reinforcement. It includes a hydraulic press demonstration of compressive strength.
Why HN readers recommended it
Commenters link it as an approachable explanation of concrete basics in threads about Roman concrete, construction and sand supply.
This is a summary from the source dataset, not an endorsement by Hacker News or the video creator.
Video & recommendation details
- Creator / channel
- Practical Engineering
- Topic
- concrete and civil engineering
- Format
- explainer
- Level
- intro
- HN recommenders in dataset
- 2
- HN mentions in dataset
- 3
- Recommendation years in dataset
- 2018–2023
These counts and years describe the included Hacker News records; they are not YouTube views or the video’s publication date.
From the original HN conversations
Excerpts from the recorded comments. Follow each source for the full comment and surrounding discussion.
You're going to love this playlist from Practical Engineering [1]. Grady explains all of this much better than I could. The second video explains reinforcement and the fifth explains pre-stressing. [1] [VIDEO]
walty on Hacker News · 2023-01
In Riddle solved: Why was Roman concrete so durable?Concrete is made up of both cement (the CONtinuous part) and aggregate/stone (the disCRETE part), so cement vs concrete is kind of like broth vs soup, and concrete and stone like soup vs vegetables. > So the main difference is that you can shape it …
zen_of_prog on Hacker News · 2022-07
In How the Colosseum was built and why it was an architectural marvel
Summaries, classifications and recommendation records are from the HackerTube source dataset. Read about this library and its limitations.