Mansfield mirror. (Mansfield, Wright County, Mo.) 1908-1957, 1917-02-15
GOOD
OF CONCRETE ROAD

VALUE OF CONCRETE ROAD
-
Engineer Compares Il with Other
Types Of Highways and Shows IT.
Many Advantages.
"A concrete road will tend to pull
any community out Of the mud and
stay out" according to A. N. johnson,
highway engineer, who for a number
Of years was connected with the office
Of public roads. United States depart
ment Of agriculture.
In speaking on the subject Of con-
crete roads, their construction and
value to q community, he said:
"Clean, hard, we'll graded sand and
pebbles or crushed stone, mixed with
cement and water to form a Of
quaky or jellylike consistency, even
tually hardens into stone. When such
q mixture is Ibid 70 that slabs 10 feet
wide by from SOTO so feet long are
formed, you have pavement with a
durable, non-skid surface making pos
sible higher traffic speed with large
loads drawn by fewer horses or less
tractive power-a road open to traffic
1886 days In the year-briefly, a con-
crete road.
Successful concrete road .c~0nstruc-
ton requires, first, proper preparation
of a foundation or subgrade. This
means compacting the soil where the
concrete is to be laid and providing
drainage so that water will not remain
under the concrete slabs. Upon the
properly prepared foundation concrete
is placed in one or two layers or
courses. This means that some con-
crete roads are built after what is
known rs the one-course construction.
1.-THE first consists of a relatively rich
concrete mixture throughout; the sec
ond Of a somewhat leaner mixture for
a base. with a richer top or wearing
course applied before the concrete in
the base has commenced to harden.
Usually where the slabs forming a con-
crete road are greater than 16 feet
wide, or where the roads must cross
low. frequently wet and hence poorly
drained spots, reinforcing In the form
of mesh fabric is embedded in the con-
crete while placing. This assists to
prevent the slabs from cracking, either
as the result of settlement of the foun-
dalton or from the heaving due to frost
action ~
High wearing quality Of the con-
crete road results from using prop
erly graded, clean, hard sand and
crushed rock OF pebbles. These must
be combined with cement and water in
proper proportions. Cement makes u
firm binder. 1t holds the sand or brok-
en- stone so tightly together that mod
ern traffic produces but little wear on
the surface and cannot dislodge the
particles.
Concrete roads cost in the neigh
borhood of $4,000. per mile to build.
When built the cost of keeping them
in repair, owing to the permanence
Of concrete, is an average of only $50
per mile. The enormous annual saving
in the maintenance of a concrete road
compared with other types Is shown by
statistics gathered from Massachu-
sets, Connecticut, Rhode Island, New
Jersey and New York for eight years.
These combined statistics show a total
average cost per mile Of $608 for main
tenance of roads built with material
other than concrete, while q concrete
road costs only an average Of $50 per
mile per year.
"Reduced to an average basis and
distributed over a period Of 20 years
under a $1,5OO,O00 bond issue, the av-
erage cost of a concrete road to a
farmer living on land valued at $30.63
per acre is 8A cents per acre per year.
This estimate is based upon proposed
concrete road construction in Vermilion
county, Illinois, and Vermilion county
has just accepted bids for 141 miles Of
concrete highway. Distributed I've a
period Of years and elualized among
the farmers and taxpayers who are
thus enabled to reach their market
town 1866 days in the year-and more
quickly than ever befOre-with larger
loads drawn by fewer horses, the cost
Of a concrete road is negligible. So q
concrete road Is relatively cheap be-
cause a profitable investment"