The Democrat-sentinel. [volume] (Logan, Ohio) 1906-1935, 1906-10-04

novaculite. About May /, 1905, after
fifteen years of wear repair of these
streets became necessary. The old sur
face was first swept clean with horse
sweeper so us to expose the solid pave
ment beneath. This was done because
tar will not penetrate Il road surface
which is covered with dust and loose
material. Next. the surface was loos-
ened by means of spikes placed in the
wheels OF Ten ton steam roller, the
street reshaped and new material add
ed where needed. The road was then
sprinkled rolled, bonded and finished
to form Il hard compact. even surface
and allowed to dry thoroughly before
either tar or oil was applied, for nei.
ther substance can penetrate moist
road surface. The best results are OBJ
tanned when the work is done in hot,
dry weather, and accordingly the tar
was first applied in August. 1t may be
well to add that the novaculite used in
the construction of the roads is an al
most nonabsorbent rock.
The tar used was byproduct from
the manufacture of coke and was prac-
tically free from moisture 1t was
brought to a temperature which gener-
nly reached no degrees f., but when
placed on the road it was reduced to Il
temperature from 100 degrees to 100
degrees +. The hottest tar produced
the best results. 1t was spread with
hose.
LaborerS, with street cleaners
brooms of bamboo fiber. followed the
tank and swept the surplus tar ahead.
They spread it as evenly and quickly
as possible and in Il layer only thick
enough to cover the surface. One side
of the street was finished at time
and barricades placed to keep off the
traffic until the tar had had time to
soak into the surface. The time al
lowed for this process was varied
from few hours to several days.
From the results obtained it can be
stated that under Il hot sun, with the
road surface thoroughly compact, c,e.sn
and dry and with the tar heated a.
most to the boiling point and applied
as described above, the road will alb
sorb practically all of it in eight or teu
hours. A light coat of clean sand,
screenings or the clean particles swept
from the surface of the road may then
be spread as evenly as possible and
rolled in with n steam roller.
After more than seven months, In
cluding the winter season of 1905-06
the tarred streets and roads are still
in excellent condition. They are hard
smooth and resemble asphalt, except
that they show more gritty surface.
The tar forms Il part of the surface
proper and Is in perfect bond with the
macadam. Sections cut from the
streets show that the tar has penetrat-
ed from one to two inches, and the fine
black lines seen in the interstices be-
tween the individual stones show that
the mechanical bond has been re-en-
forced by the penetration of the tar.
The tar Is matriX into which the
stones of the surface are set, forming
conglomerate or concrete. A second
coating applied year after the first
would require much less tar than the
first as the interstices of the rock
would then be filled with tar.
A tarred street Is dustless in the
same sense that an asphalt street ls !
dustless, though a fine sandy powder |
wears off, as in the case of asphalt. |
1t can he swept or washed clean. These |
streets have since been swept regularly |
and the city government is in favor OF
treating all of the streets with tar.
The cleaning that would soon ruin an
ordinary macadam road does not in
jure the tarred surface, as the stones
are not torn up or disturbed. The tar
itself has antiseptlc properties; hence
its use would be beneficial both as Il
germicide and as a means of securing
cleanliness.