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.
Hide this

Thank you for reading this Techdirt post. With so many things competing for everyone’s attention these days, we really appreciate you giving us your time. We work hard every day to put quality content out there for our community.

Techdirt is one of the few remaining truly independent media outlets. We do not have a giant corporation behind us, and we rely heavily on our community to support us, in an age when advertisers are increasingly uninterested in sponsoring small, independent sites — especially a site like ours that is unwilling to pull punches in its reporting and analysis.

While other websites have resorted to paywalls, registration requirements, and increasingly annoying/intrusive advertising, we have always kept Techdirt open and available to anyone. But in order to continue doing so, we need your support. We offer a variety of ways for our readers to support us, from direct donations to special subscriptions and cool merchandise — and every little bit helps. Thank you.

–The Techdirt Team

Filed Under: cement, concrete, materials, portland cement, roman concrete, secc, self-healing, superhydrophobic engineered cementitious composite

Reader Comments

Subscribe: RSS

View by: Time | Thread

  1. icon
    art guerrilla (profile), 17 Jul 2014 @ 5:25am


    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...

Add Your Comment

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

Subscribe to the Techdirt Daily newsletter

Comment Options:

  • Use markdown. Use plain text.
  • Make this the First Word or Last Word. No thanks. (get credits or sign in to see balance)    
  • Remember name/email/url (set a cookie)

Follow Techdirt
Insider Shop - Show Your Support!

Essential Reading
Techdirt Deals
Report this ad  |  Hide Techdirt ads
Techdirt Insider Chat
Recent Stories

This site, like most other sites on the web, uses cookies. For more information, see our privacy policy. Got it

Email This

This feature is only available to registered users. Register or sign in to use it.