Evening times-Republican. [volume] (Marshalltown, Iowa) 1890-1923, 1909-05-10
HAVE CONCRETE PAVING NOW
Discovery Made That Marshalltow,
Has Concrete Paving Already in Use


Discussion of concrete paving in the
Times Republican of Saturday has
brought one Of Marshalhown's success
full business men to the newspaper Of
flee with suggestion which is worthy
of note, altho he insists upon keep
ing his name out of the paper. He
knows a good deal about concrete. has
paid for great deal of it, and is the
kind of a man who seldom gets beat in
what he buys. He added:
Did you know that the city of Mar
shalltown has been laying concrete
paving in our streets for several years :?
No"
well you have driven and walked
over hundreds of yards of it in the ce-
ment crossing and driveway approaches
to wholesale houses, etc. This paving
has stood the test of time with loads
striking kershug against it and IL these
| same crossings were merely extended
across the street into pavement they
would not have near as severe wear,
for the load would roll along on top
without the shock and resistance that
Is given to a crossing or driveway APP
proach when a wagon strikes it.
"Now." he continued "do you know
how these crossings are made?"
mo"
well, get your city sidewalk speci-
| fications and you will find that cross
ings have base FIVE inches thick,
made one part cement to four of sand
or gravel, while the granitoid pave
ment has a five and a half inch base
mixed one part cement to seven of
sand and gravel. The granitoid base is
half an inch thicker. but does not con-
tain as much cement by % per cent
as our city puts into its crossing bases.
The top wearing surface is the same
thickness as the Gary paving. exactly.
being one and half inches thick and
Of exactly the same proportion of ce-
ment, two to three, except that in our
crossings we use Iowa river sand
whereas the granitoid calls for
crushed granite mixed according to a
patented process"
eyes, but will the sand stand the
wear?" Was asked of him.
"My, boy did you eyer hear of any
of our crossings going down? Ask any
cement engineer and you will find that
cement gets Infinitely harder than
granite and all it needs is a binder like
the sand You don't want stone in the
top course at all, put the stone in the
base like the Gary people do. You can
use less cement in a thicker base than
when sand alone is. used and get a
stronger foundation. Notice they use
one to seven of stone. and sand while
our crossings have one to five of sand
alone"
well, what is the cost of such a
pavement" was asked.
"Ask Carlson. He puts in the city's
crossings"
Mr.. Carlson was asked for the price
replied that it was s135 per square
yard. ritz
The T.-R. today received a copy of
the specifications for the cement paw
ing which has stood up for five years
in LeMars. 1t was laid by a Mr.. M. "A.
Moore, uncle of A. A. Moore, of Mar
shalltown. That paving was almost a
duplicate of our cement crossings. The
base was the same thickness Of five
inches and was mixed one to six of
gravel, whereas the crossings have one
to five, and granitoid one to seven. And
the top Wereing surface was the same
In thickness as the crossings and as the
granitoid, but not quite so rich, being
mixed 33 per cent to CT per cent, in
stead Of 40 Oper cent cement to 60 per
cent sand in our crossings, and same of
cement to so per cent granite In gran
itoid. The LeMars paving was laid at
a cost Of s1.25 per yard when cement
cost almost twice as much as 1t does
today, and it has stood a five years.
successful test in the main business
street of city Of 5000 people.