
i wrote about the beautiful book "recipes for disaster" and
the way it came to me some time ago. one of the lines of experimentation that came from that book was the asphalt mosaic technique, also known as "
Toynbee-tiles" (named after mosaics found in Pittsburgh, Pennsylvania).
in brief, this is a way of creating permanent mosaics in asphalt by placing some kind of material on the road and allowing traffic to embed it over time. pretty much in the same fashion that random objects like keys and other pieces of metal get embedded on the road.

our first try was this "earth in flames". we followed the directions from the crime think article (web version
here) except for the crack filler (instead we used henry's brand roofing repair tar) but the results were pretty good. it takes months for the thing to be visible since the layers of roofing paper have to be peeled away by traffic. the placement of this piece was somewhat unintentional too; we put it a few feet away from the crosswalk but the cars making a left turn and accelerating moved it on top of the white line.
it takes certain amount of patience once you install it but once it comes out it can last for many years. the downside of this particular location is that eventually the white line might be repainted by the city. lesson learned: don't put your mosaics on the turning lane.
now, if you are not the kind who wants to wait long for visible results here is another technique.
my work has been giving me access to a bunch of discarded roofing materials so i've been experimenting. there is this thing called modified bitumen (industry people call it "mod bit") that is used mostly on flat roofs. it's asphalt mixed with polymers then applied to a fiberglass or polyester mat and covered on one side with an even coat of gravel. there are two kinds, one is applied with a torch and the other one comes with a sticky underside protected with thin film that can be peeled, hence called "peel and stick", that's the kind you want, unless you want to be torching stuff on the side of the road. it comes in long heavy rolls so probably you don't want to buy it, it can be found in the dumpsters of roofing contractors or solar companies (check your yellow pages). i have found pieces left over in construction sites or even left on roofs (check your roof if you have access). if you live in a place with a friendly handyman he might have pieces laying around for repair work.
the material can be cut in any shape you want. you can use special roofing blades (they have a hook at the end) or tin-snips or even regular razor knife (the gravel on top will kill the edge pretty fast). but be careful, the stuff is somewhat sticky and hard so don't get cut. to place it just peel the back and put it on the road near a sidewalk or crosswalk but make shure cars will go over it so other people don't feel compeled to remove it (believe me, they do) and it gets flattened quickly. choose a light section of road because the gravel will dissapear and you'll be left with a nice black shape.

the mushroom above has been in place for about six months and the stars are a week old so the gravel is not gone yet. i still like the initial look, instant satisfaction, they are like asphalt stickers.

sometimes the color of the road matches the sticker too well and it's not so visible once it has lost the gravel coating:

turning cars can also damage your designs, so choose your placement wisely:

if you try the mod bit sticker technique i'd love to see your pictures, please leave a link in the comments. thanks to Yuki for co-creating these, watching out for incoming cars and taking the close up pictures above.
Labels: asphalt, graffiti, mosaic, mushroom, street art