Concrete Does Not Dry Out

Concrete doesn't dry - it sets! Thanks to http://www.audible.com/minutephysics for supporting this video. More about the hydration reaction: http://iti.northwestern.edu/cement/monograph/Monograp...

==========
In a few hours, this sloppy wet concrete will harden intoa solid, which, after a few days will be strong enough to hold many tons of weight.Pasta also starts in a moist amorphous state, hardens after a few hours, and it can also holda lot of weight.But there’s an important difference between capellini and concrete – noodles dry out(which you can tell because when you add water, they re-absorb it and become soft again),while concrete sets (you can pour as much water on it as you want, and it won’t becomesoggy - which is good because you don’t want buildings and bridges to get soggy whenit rains).The distinction is that when pasta is made, water simply evaporates out of the dough,leaving behind a desiccated, starchy scaffolding with plenty of holes &...
Concrete Does Not Dry Out
Share & Embed

Embed the player

COPY
loader
If you prefer to rent each film separately and not to join a subscription,  Click Here..