DailyDirt: Long-Lasting Concrete Ideas

from the urls-we-dig-up dept

Every year, people pour billions of tons of concrete to build the stuff we live in and drive on. Concrete is everywhere, so it’d be nice to find better ways to make it and to make it more durable and to last longer. (FYI: Concrete is usually made up of 10-15% cement, and the cement is used to bind together sand and/or crushed rocks in concrete.) Here are just a few links on making better concrete.

If you’d like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post via StumbleUpon.

Filed Under: , , , , , , ,

Rate this comment as insightful
Rate this comment as funny
You have rated this comment as insightful
You have rated this comment as funny
Flag this comment as abusive/trolling/spam
You have flagged this comment
The first word has already been claimed
The last word has already been claimed
Insightful Lightbulb icon Funny Laughing icon Abusive/trolling/spam Flag icon Insightful badge Lightbulb icon Funny badge Laughing icon Comments icon

Comments on “DailyDirt: Long-Lasting Concrete Ideas”

Subscribe: RSS Leave a comment
Mason Wheeler (profile) says:

Superhydrophobic concrete would very likely make a horrible material for roadways, because hydrophobic materials tend to have one other thing in common: low friction. Which doesn’t sound so bad until you realize that in the context of vehicles and roads, friction is more commonly known as traction, and surfaces that don’t have much of it are called “slippery” in layman’s terms.

art guerrilla (profile) says:

Re: Re:

w-e-l-l, the actual chemical process (called hydration), theoretically goes on forever (albeit in an asymptotic curve), as long as it has some water to do the reaction…
but what you say is true: depending on the environment, concrete can be strengthened by proper ‘curing’ (so to speak), as far as keeping it moist over the first week or so…
the other major problem, is that ignorant mud pushers mix in way too much water because it makes it easier to “pour” (concrete should always be “placed”, not “poured”, says my old concrete structures prof) and slop around the concrete, but causes weaker concrete in several ways: tends to segregate the aggregate, and makes the cement itself weaker…
been all kinds of admixtures for a long time for specialized mixes: retardants to slow the reaction, accelerants (stop flagging real words, you useless spel czech) for quick-setting, fiberglass threads for strength and to increase its resistance to cracking, etc…
oh, concrete WILL crack, just a matter of controlling it where you want it to crack…

Robert says:

Re: Re: Re:

” not “poured”, says my old concrete structures prof”

Very true. Also the time between mix and pour, temp, humidity….

I happened to go to a high school that had all sorts of testing equipment for my “Strength of Materials” course. Believe me when I say proper curing is extremely important to the strength and longevity of concrete. My concrete biscuits proved the point.

Romans used fly ash which created a stronger, less porous cement.

Add Your Comment

Your email address will not be published. Required fields are marked *

Have a Techdirt Account? Sign in now. Want one? Register here

Comment Options:

Make this the or (get credits or sign in to see balance) what's this?

What's this?

Techdirt community members with Techdirt Credits can spotlight a comment as either the "First Word" or "Last Word" on a particular comment thread. Credits can be purchased at the Techdirt Insider Shop »

Follow Techdirt

Techdirt Daily Newsletter

Techdirt Deals
Techdirt Insider Discord
The latest chatter on the Techdirt Insider Discord channel...