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Concrete

Concrete's future looks lighter, greener
By Brandon Keim, The Christian Science Monitor

Now, thanks to environmental pressures and entrepreneurial innovation, a new generation of concretes is emerging. This high-tech, Willy Wonka-esque assortment of concrete confections promises to be stronger, lighter, and more environmentally friendly than ever before.

The concretes they will replace are, for the most part, strong and durable, but with limitations. Like a stick that can bear a body's weight yet be broken over one knee, concrete is sound under compression but weak under tension.
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Concrete

I never really gave concrete much of a second thought. But the idea of concrete that actually scrubs carbon dioxide out of the air is extraordinary! Imagine the possibilities of a concrete used every where that could both stand strong and help our atmosphere! Using that concrete on highways and roads that cleans the air while we drive would be phenomenal.

Concrete UFO & Writing Art Education Sciences

Unlocking the secrets of creeping concrete


Concrete is everywhere -- a ubiquity owed to its strength as a building material. Despite its strength, however, it has a pernicious but inescapable tendency to 'creep,' or deform progressively under mechanical stress, which leads to crumbling bridges and cracked roads. Despite the obvious relevance this holds for the safety of infrastructure, however, the physical origin of the mechanism has remained poorly understood, and even scientifically contested. Ref. Source 5d.

Concrete

Ancient concrete: Learning to do as the Romans did. A new look inside 2,000-year-old Roman concrete has provided new clues to the evolving chemistry and mineral cements that allow ancient harbor structures to withstand the test of time. Source 8o.

Concrete

Knowing that the romans had a much better concrete recipe than modern day does is interesting. How did the original formula get lost or changed? Was it a supply shortage or someone just wanting to make a short cut? Either way it is safe to say the romans did much better with concrete.

Concrete

Many secrets were lost with the fall of the Roman Empire. I seem to recall an estimate that that event cost humanity 500 years of technological progress.

Ironically, the newly primitive Europeans then turned around and ransacked what we now call the middle east, destroying the culture that had preserved and expanded on much of the knowledge they had lost, setting things back even further.

Regardless, it is good to know we're learning some more of that lost knowledge.

Edited: daishain on 6th Jul, 2017 - 6:52pm

Concrete

Could concrete help solve the problem of air pollution? Sulfur dioxide, a major contributor to air pollution, is removed from the air by concrete surfaces, new research shows. Source 3i.

Concrete Sciences Education Art Writing & UFO

Here's a tip: Indented cement shows unique properties. Three key molecular mechanisms control the mechanics of layered crystals such as tobermorite, a natural crystal used by the Romans to make concrete. Source 3s.