Well, maybe it should be called mining urbanite? Urbanite is what we call the chunks of broken concrete that we use to build terraced garden bed projects like las trincheras. I didn’t coin the name urbanite… some visitor to eco-village many years ago called it that, and it stuck. I am a big proponent of urbanite and use lots of it in my garden.
This week I was bicycling up Vermont Avenue, and, in front of the Rite-Aid just below 3rd Street I came upon a Los Angeles Conservation Corps crew. They were using a jackhammer to bust up concrete and create holes where street trees will be planted. There was a pile of rubble in their truck. I asked one of the crew if I could take some pieces. On my bike I could only take two pieces, which I carried under one arm.
I am really happy when I can get broken concrete within a mile or so of eco-village (during the shared street construction on our block each night I’d carry as much as I could,) that way I can harvest it without using fossil fuels. It’s great to be able to use waste where it’s generated. Sometimes, though, I across a big stash and then borrow a car or truck to haul it. Sometimes, I’ve been able to get folks to drop it off. They generally will need to pay a tipping fee to dump it at a landfill, so giving it to us saves them money.
When I got to eco-village I grabbed our hand truck and walked the two blocks back down to the site. I loaded it up with the nicest biggest pieces I could find. My general recommendation is that the really useful pieces are ones that are the size of a brick or larger. The bigger the better, as it’s easy to break pieces down, but impossible to put them back together.
I brought two loads of urbanite back to the village. The first load wasn’t so heavy, so then I proceeded to really load up the second time. It got too heavy to lift at that point, so I had to push it along the ground on four wheels. Thanks to Brad who I encountered waiting for the bus and who helped me get it up the curb ramp at 3rd and Vermont.
One urban permaculture strategy is to harvest the immense waste streams generated by our cities. Of course, nature is really good at this; the output from any natural process serves as the input for another. From trash to rainwater to sewage, we city folks generate and discard a lot of stuff that is really useful. If we’re going to live sustainably, then we need to close these loops; to use our outputs as input.
Clearly I can’t make a serious dent in the massive urban waste streams that are generated by the sprawling urbanity that is Los Angeles, but nonetheless, I am happy when I can divert some of our castaway things into good uses.
January 28, 2009 at 8:39 pm
I work with the LA Conservation Corps and am happy you found our crews out there working to plant more urban trees.
It sounds like you may need more concrete, and we have tons. Let me know if you could use more and if our crews could be of assistance to your village.
LA Corps performs many community beautification projects, such as community gardens, landscaping, and park development. The youth you met are 18-24 year old, at-risk youth who receive formal on-the-job training and gain their high school diploma through our programs.
Thank you,
Cheyanne
February 7, 2009 at 2:30 am
I am very curious.
Could you please tell me what you do with urbanite?
Thanks.
Lorna
February 8, 2009 at 2:56 am
@Lorna – well… you can cook it like spinach… kidding. I stack it to build garden terraces. It’s also good for stepping stones, etc. See this blog entry for a project where I used a lot of it: https://laevgarden.wordpress.com/2008/11/14/water-harvesting-in-my-front-yard/
April 16, 2010 at 1:54 am
[…] I actually visited mostly to check out the La Loma’s excellent broken-concrete (or “urbanite“) amphitheater seating areas. Anyone who has seen my garden knows that I really enjoy working […]
June 2, 2010 at 11:54 am
How did you test the concrete /urbanite for toxins (dangerous chemicals) to ensure that they were not present or would not leach into the soil?
June 18, 2010 at 11:36 am
I don’t test it – though I will hose it off if it’s from a questionable source (I don’t get it from chromium factories or known toxic sites.) My understanding is that broken concrete is very inert. I’ve heard that it can leach a tiny tiny bit into soil making soil a tiny tiny bit more basic… but this really isn’t an issue if you don’t have standing water up against it.
February 28, 2019 at 11:49 pm
[…] been recycling waste concrete for some time; I remembered blog posts from years ago about ‘harvesting urbanite‘ and ‘how to recycle concrete into urbanite‘. That’s not a new idea, of […]