A chip seal job is the poor man's
paving. Instead of paving a road with asphalt
, which are amazingly expensive
will often use chip sealing. It's much cheaper
, and has many of the advantages as a real
Here's the lowdown
to be sealed is usually gravel
. The road is first paved
so there's a nice
cap (rounded form, being higher in the center).
A penerating oil
is applied. This is that super black
, sticky shit
that you see sprayed on highways
. It ruins
everything it touches. However, this oil
holds the road together nicely
. It's applied, then allowed to dry
for 24 hours
. After a day, it is pretty hard.
After a day has passed, crews come in an apply a second layer of penetrating oil. While the oil is still hot
(it's sprayed out at about 230F), a chip spreader
follows immediately behind the applicator truck
the chips on. Around here, the chips we use are pink granite
chips. They're hard little rocks that make a nice driving surface, but suck ass for rollerblading
Following about 300' behind the chip spreader are a series of rollers
. They pack
the chips into the oil, where hopefully they'll stay. Three or four rollers are used. The rollers are positioned
to form a half
V shape -- like ducks
fly. That way the each overlap
the other's tracks.
And that's about it. To chip seal on mile of gravel road costs about $100,000. And they call this cheap.