The Logan Republican. [volume] (Logan, Utah) 1902-1924, 1912-02-01

phalt Is the one commonly used. 1t
Is laid in two or three courses; as.
phalt in two courses consists of a
concrete base to 8 inches thick
and bituminous course to in.
ches thick, asphalt in three cours $
consists of the concrete base, bin.
dee course of broken stone and btu
men laid about one inch thick, and a
surface mixture of asphalt cement,
powdered lime stone and sand usu-
ally laid one to one and a half in
ches thick The binder course gives
depth and strength to the surface
thus preventing the tracks and wave
surfaces which may otherwise appear.
An old macadam base can often be
used satisfactorily.
Tarvia, which is special prepare.
ton of asphaltic oil, has been used
satisfactorily in many eastern cities.
In Los Angeles streets constructed
with a similar mixture have not prov.
ed satisfactory as they have been
badly worn in 3 to years.
| In considering the most desirable
road to build, maintenance Is an i'm.
portant consideration. The life of a
macadam road Is 8 to 10 years, but
this figure is reduced much by auto
| traffic, altho sprinklng or oiling
helps in this Mr. Joseph in Beaver
county reports that an excellent high
way Is in danger of becoming spoiled
through lack of oiling to protect the
surface or sufficient sprinkling
Sprinkling a macadam road surface
with water has an important effect in
reducing the wear and prolonglng the
life of the road If the road be system
atically sprnkled, the material
ground off by the traffic will pack
upon the surface forming cushion
which seems to protect it from fur
Their attrtion In sprinkling. the OBJ
| ject should be to keep the surface
damp, and not to flood 1t by applying
too large a quantity of water at once.
| In eastern cities. however, the water.
ing cart is superseded by the oil cart
| The use of oil or hardening the sur
faces of earth and gravel roads orig.
mated in California. "The use of oil
was at first intended only for the
/ purpose of laying the dust, and the
/ surface of the road was sprinkled two
or three times during the summer
with a light coating of oil. The effect
of the oil upon the road was such as
/ to quickly modify both the purpose
and the method of the application,
and many roads We're soon construct.
ed in which oil was used for the
purpose of binding together the ma
terial of the road surface, and thus
forming a crust over the road which
results in general were satisfactory,
giving in many instances smooth
firm road surfaces, free from dust
during the summer and without mud
IN the winter" 1t is not advisable 20
. put oil on road that is not in very
! good shape or has clay foundation.
The oil used for roads is commonly
crude asphaltic petroleum of certain
specific gravity. and containing from
/ 80 to 90 per cent of d. grade as.
! phalt. In the earlier work the oil
was always applied hot at tempera.
, ter practice cold oil has frequently
. been used and each method has its
| advocates. The amount of oil re-
! quired varies with the character of
the soil and the method of treatment.
AS much should be used as the soil
will take up. The quantity Of oil us
ed varies from about one-half to one
and one half gallons per square yard
of road surface for the first applica.
/ tiOn and one half TO one gallon for
I the second. The maintenance of roads
usually requires an application of oil
each spring, the quantity required
! decreasing from year to year. Oil
here costs about .O6 per gallon and II
would probably require an application
two to three times during the sea
son. This is usually found cheaper
than sprinkling,
The general introduction of wide
tires upon vehicles travelling over
highways would greatly simplify the
problem Of road maintenance, parti.
cularly upon earth roads This fact
is generally admitted and appreciated
by road builders but the practical diff
ficulties met in attempting to change
the prevailing system of narrow tires