1. ryanator

    Bad concrete work from contractor

    With the city mandating concrete work, we were required to fix some cracked sidewalk slabs. Even though i could have repaired it with patching it and still be nice and level, I had to get a licensed concrete guy to pour a two new slabs and some curb and gutter. the problem happened when he...
  2. nodle

    China using massive amount of concrete

    Insane! :eek: China produces and consumes about 60 percent of the world’s cement — the Three Gorges Dam alone required 16 million tonnes of it. To put China’s massive 21st century construction splurge and concrete consumption into perspective, Bill Gates made a mind-blowing comparison...
  3. nodle

    Pervious concrete

    Why can't they use this stuff on roads and sidewalks then?
  4. nodle

    Zoom into a Concrete

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  5. nodle

    Giant Concrete Ears

    Early in World War 2, before the invention of radar, the British isles had an interesting system devised to detect incoming enemy aircraft. They constructed a number of huge, concrete, acoustic mirrors which focused and amplified sounds coming from a given direction. Some were bowl-shaped and...