Simple answer is yes. However, that is essentially what the water
blasting does. BY modulating flow rate, pressure, and nozzle type, we
actually put holes through a slab like a core drill. The trick is to get
the top stuff, if loose, to be gone without destroying the solid stuff.
GPD4
On Mon, 11 Dec 2000 02:17:39 -0500 Jon & Deb Rush <jdrush@enter.net>
writes:
>
> Shouldn't you chip off the top surface of the old concrete until you
> see
> the aggregate? We were always taught that the top layer of concrete
> was
> the weakest and should be removed if you want a good bond with the
> new
> concrete.
>
> Jon Rush
>
> George P Dausch IV wrote:
> > 2. Sweep off the original, then water blast to remove all loose
> stuff.
> > Allow to thoroughly dry and form the edges. Apply a coat of
> concrete
> > bonding agent according to directions. Pour somewhere arond
> 1.5"/2" of a
> > very high strength pea gravel mixture with fiber. This gives a
> bonded
> > slab, but counts on the integrity of the existing slab. Cracks in
> the
> > original will migrate upward eventually, even if forced into
> preplanned
> > control joints.
> > In either of the above cases, concrete thickness is the minimum
> from the
> > highest elevation of the existing.
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
|