an interesting concept.......like a concrete sponge, not a 100%
I assume it must have to be installed thicker than 100% dense concrete
to have the same strength.
There are "driveway blocks" that are 8" thick "honeycombs" that you
can actually fill with topsoil and grow GRASS on. These drain very
well if filled with crushed limestone or sharp sand. Drain like
gravel, wear and clear like concrete. Weeds grow through like cheap
Thats about what a properly done driveway cost here in NC too. A lot
of homes were buit with about a 2 inch slab, no reinforcing material
at all. You can get these for about $2.00 a square foot. They are
guaranteed to start falling apart in about 4 years.My electric and
water service cross beneath my drivway so when I rebuilt it I
Installed a couple of PVC pipes beneath the driveway just in case they
ever need maintenance.
Last time I checked up here in Ontario a cheap concrete driveway was
twice the price of a good asphalt driveway - and even a cheap concrete
will outlast a good asphalt.
Use air entrained high strength concrete with re-bar and expansion
joints ever 12 feet max in all directions.
If you can get "grout" for the top inch or more it will cost more, but
last virtually forever. The driveway my Dad had put in 30 years ago
still looks like new - salt, winters, and all.
Never seen black concrete, or any real dark shades in any color. It'd
have to be real dark to get any noticeable solar heating benefits. I
suppose you could paint concrete with the asphalt sealing goop, but it
probably wouldn't stick very well, and even on broom finish, it would
make it slick.
Don't get me wrong- if up-front cost is no object, well-laid concrete is
the clear winner. The snow-melt thing is just a side benefit that helps
people like me take solace in being lower on the food chain. But with my
sloped driveway (which are pretty common around here in spite of the
flat terrain), it is an advantage.
On Thu, 09 Apr 2009 05:59:22 GMT, Wayne Boatwright
Under those conditions 2" (compacted) of fine asphalt would do the
job and be your cheapest alternative. 3 or 4 inches would be better,
but you don't have winter or vegetation issues, yout base is solid,
and your usage is light. If you plan on having heavy trucks on the
driveway in future, go thicker.
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