The Denison review. [volume] (Denison, Iowa) 1867-current, 1914-09-30
OFFICIALS LOOK
AT some PAVING
Denison City Council and Mayor Pay
Visit to Sioux City Friday Last
HAS THIRTY MILES OF PAVING
Well Pleased With What Is Apparent
Iy First Glass Paving Mixture
City Proud Of Her Streets

Upon the invitation of Mr.. w. Fl.
Bigbe, of the Portland Cement COM
pany, the Denison city officials made
o trip to Sioux City last Friday for
the purpose of inspecting the many
miles of concrete pavement that has
been built in that city. Mr.. Bigbe met
the party with two automobiles and
, a drive about Sioux City and Morning
side, covering some thirty miles was
made. The streets travelled were
paved with concrete and were to all
appearances in first class condition.
Some of the more prominent thor.
oughfares where traffic was said to be
very heavy, we're paved with concrete
and looked none the worse for wear
In fact the concrete paving was in
the best condition of any pavement
in the city, and is said to have cost
much less. Some of it has been built
six and eight years, and has with
stood the cold and heat without ap-
parent damage. In slippery weather
traffic does not encounter difficulty,
and there was no complaint from
tcamsters. Hills much sleeper than
any in Dcnison were paved, and Sioux
City officials accompanying the party,
said the teamsters preferred the con-
crete over other kinds of paving.
One point in favor Of concrete is
the matter of dust and dirt, the con-
crete is cleaner. drys off quicker af-
ter showers, and does not hold the
dust to the disadvantage of pedestri-
ans. Another important factor is the
cost. Much of thehPRvipg in Sioux
City cost as low asl$1,92 square
yard, and up to $l.30. Sioux Falls
crushed rock is used as a base and the
construction of the work does not re-
uuirc expert workmen. In case wa
ter pipes, sewer mains or gas mains
are to be repaired piece of concrete
is broken out and patched without
noticeable harm to the pavement.
The method OF building concrete
pavement is simple. In making the
sub bgrade the streets are graded to a
true crown and the ground after be-
ing dressed is rolled with steam
roller weighing several tons or thor
cughly tamped with an S0-pound ham
mcr All hollow places or other inl-
perfections, over or in trenches, are
broken down and thoroughly consoli-
dated, by tamping. All soft or spongy
material, wherever required, is re-
the contract price per cubic yard for
placed with gravel or broken stone at
subgrade no earth is removed below
such material. In preparation of the
the base of the foundation, and any
earth taken out below such line may
be replaced with gravel or broken
stone. In all places wherein filling
is required to bring the bed to the
required height it is done in layers
not to exceed inches in depth and
thoroughly rolled to insure solid
bed. Upon the sub-srade the concrete
is laid six inches in thickness after
being compacted. The fine material
consists of sand, crushed stone or
gravel screenings, graded from fine to
coarse, passing through G screen hav-
ing oneNuarter inch diameter. The
coarse material is of crushed granite,
iasper or quartzite. crushed run, and
must pass l 1-2 inch ring.
The joints or filters are of strips
one-half inch wide by seven inches
and five feet in length and are COM
nosed of onefourth inch asphalt be-
tween two layers of best grade OF wool
felt thoroughly saturated, coated and
bonded with pure grade asphalt. This
is allowed to extend above the con.
crete and soon wears down, thus pre-
venting any rough edges.
The mixture of the concrete tOr the
base is proportioned SO that the ce-
ment will fill all places in the fine