I suggest that you consult the Portland Cement Association (which I worked
for for several years) and Concrete Technology and Practice by W.H.
Taylor. There is a section on Concrete floors and it recommends several surface
treatments and especially "magnesium silico-fluoride" for surface hardening.
Epoxy resins are also used to harden and toughen surfaces.
There are national companies which specialize in these types of
floors. Make sure you don't allow any slag in the concrete.
I assume you will specify air entrained concrete.
Stan Scholl, P.E.
We have been asked to design a concrete pavement
for a fairly large area (about 8 acres) and I want to make sure that we do it
right. The pavement will have fairly heavy equipment on it and the
surface must be durable because of steel being roughly moved around on it and
heavy track equipment being present. The project is here in eastern PA
where we get significant freeze thaw cycles. I have been given the equipment loading information for a large rubber
tired loader and a track-hoe.
The site is an old industrial site (Bethlehem
Steel) where there is a lot of existing slag. The slag concerns me a
little and concerns the geotechnical engineer a lot.
Of course I am looking for your personal
experiences with similar work and any recommendations that you may have.
A listing of any publications that you have found helpful would be appreciated
Some of the basic questions that are being
Is the slag a problem? Can it be used as
the subbase? If not, can it be just covered with a decent stone
Reinforced vs. Plain Cement Concrete vs. Fiber
Roller compacted concrete with a durable
bonded topping (silica fume?)
Dowel requirements at joints
Concrete mix design/strength
These are just a few of the issues - I know that
the list will grow and the issue is complicated. I was involved with a
large concrete pavement design about 10 years ago for a distribution
center. I learned a lot about concrete
pavements at that time, but wonder if there have been many changes in thinking
since then. I remember one expert telling us to not have any
reinforcement - not even dowels at joints - but to use a fairly close joint
spacing. From what I see on the exisiting 9" fiber reinforced pavements
that they have, the joints have deteriorated quite badly and there are
numerous cracks between joints. The panels are about
I am also looking for a copy of the American
Concrete Pavement Association 1988 publication called "Design of Heavy
Industrial Concrete Pavements" I hear that it is only about 12 pages, so
if anyone can fax it or email it to me, I would be eternally
grateful. I will purchase an official copy from the ACPA, I am just
trying to get it quicker and don't want to pay $30 for overnight
Kenneth S. Peoples, P. E.
Valley Technical Associates, Inc.
1584 Weaversville Road