Belding banner. (Belding, Mich.) 1889-1918, 1914-03-25
EXPERT ANSWERS
QUESTIONS ASKED
ABOUT PAVING
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ment with skim coat surface is some
times wrongly called by engineers "a
Bituminous Concrete Pavement.
"A Bituminous Concrete Pavement
is not generally used for streets which
have very much traffic, but are adapt
able TO residence streets only, conse-
quently would hardly be advisable for
use on Belongs contemplated streets"
Can you tell me whether wood is
used for paving now? If so is il a prac-
teal pavement and of what wood are
they made and how are they con-
structed.-A Subscriber.
No. Wood is extensively used for
paving in the larger cities and for the
heaviest traffic streets will outlast most
any other pavement. Southern Yellow
Pine, Tamarack and Norway Pine are
cut into blocks and have injected into
them, under vacuum, approximately
16 lbs. OF creosote oil. They are then
laid on a mortar bed and concrete
foundation instead of a sand cushion.
Southern Yellow Pine is the best wood
that can be used. 1t is a high priced
pavement and is beyond the reach OF
most of the smaller towns.
| investigated a concrete pavement,
recently that was laid last year. At
several places the body of the pave
ment had raised away from the gut
ter two or three inches or else the
gutter had settled away from the pave
ment leaving a break between them.
At other places the reverse condition
was true. The expansion joints had
raised the tar. Should a pavement,
properly laid, show this action Il.
a. y.
No. "A concrete pavement should
not be laid with a concrete curb and
gutter, but the concrete pavement
should be carried out straight TO the
curb placing the joint at this place.
This does away with an unnecessary
joint at point where traffic will have
a tendency to wear ii. The condition
you state about the settling at this
point is no doubt due To the fact that
the gutter had settled. If the reverse
has happened and the pavement is
lower than the gutter IL is a fault in
the construction. Perhaps the sub
grade was not properly rolled or
enough concrete was not placed in the
pavement. The expansion joints rails
ing the tar is a condition that must be
expected. They are put in a pave
ment to take up the expansion, and
when the pavement expands under
heat, as it always does, it is bound
to force the tar out of the joint. A
properly laid concrete pavement al
ways shows this condition at the joint.
Do you think from the nature of
the soil here that we should put in a
concrete footing or would sand
cushion be sufficient George Moul-
ton.
No. 4-In building pavements, eth
er concrete foundation or a broken
stone foundation can be used. In the
case Of brick, on top OF the foundation
is placed sand cushion and then the
brick. The broken stone foundation
is cheaper than concrete, but the con-
crete foundation is far preferable as
the pavement will look much better
and last much longer. With the brok-
en- stone foundation depressions that
take place in future years in the sub
grade show up in the paving and water
will stand in these places. With a
concrete foundation this condition will
not exist.
Do you think the present sewers
here sufficient for all time, or a period
of years, OF would we have to have an
entirely new system ?-F. II. Hudson.
No. 5-Regarding the present sew
ers will say that they have no doubt
been designed for period of years,
say twenty, this all being dependent
on how fast the town increases i'm pop
ulation. IL IL out-grows it's present
system you can reinforce your pres
ent system. The only question which
will confront you before long is that
Of Sewage Disposal and with several
outlets, like you now have, you will
find that IL will be more costly TO build
a Sewage Disposal plant now, than II