Abilene weekly reflector. [volume] (Abilene, Kan.) 1888-1935, 1911-11-23
REsIDENun eTREEr PAVING.
Material That Is Cheap and Seems
to Prove Successful.

IL. JuuOtiOh WV 80 ka"AAHAho W ks-f
its residence streets with concrete
and a tarvia coat. In Cleveland
Ohio, and many smaller Ohio towns
this paving is being put down. In
the small Pennsylvania towns the
concrete paving with tarvia coat
is being used, and 1t is no expert
ment. The work can be done BY
home labor. and can be put down
by any good workman. The paving
\ Is giving the best of satisfaction
and the concrete with the covering
makes paved street that is hard
ito beat.
About four years ago, in order to
prolong the life of the asphalt block
payements, which at that time show
ed considerable wear. q. W. Graves,
city engineer at Ann Arbor, Mich, as
an experiment, tried covering the
Surface OF the pavement with thin
locating of coal tar and sand. After
being subjected to various condi-
lions of traffic for two years this
thin wearing surface proved to be
so satisfactory that Mr.. Graves de-
termined to try 1t for new construc-
tion work on concrete base. Dur
ing the summer of 1909 one block
on a residence street was paved with
concrete having a coal tar and sand
wearing surface. In 1910 approx
mately 1900 square yards Of this
pavement were laid, the same type
of construction having been adopted
for the additional $4,000 square
yards on nine main streets and al
legs. This year there will be laid
in the neighborhood Of 100000
square yards, petitions having been
received for a greater yardage than
1t will be possible to construct.
Ann Arbor has a we'll drained.
somewhat sandy sub-soil, and the
concrete pavement is laid directly
upon the sub-grade without using a
sub-base, which would be necessary
where a heavy, wet, poorly drained
sub-soil is encountered. The con-
crete pavement proper consists OF a
Az inch gravel concrete base and
a IN inch wearing surface, mixed
one part of cement to two parts
clean coarse sand. The concrete is !
laid in strips one-half the width OF
the street wide, and rs feet long,
an expansion joint from Y to l inch
in width being placed every 20 feet
across the street perpendicular to
the axis and at each curb.
The surface of the concrete is
given a wood-float finish and slight
IN roughened by brushing with an
ordinary hand street broom. After
finishing section as described the
form at the center or crown OF the
street is removed, and the pavement
for the other half of the street laid,
the new concrete being deposited
against that which has been pre-
viously placed, so that while there
is joint at the crown of the street
It is hardly perceptible. This Joint
would be decidedly Objectionable
were it not protected by the wearing
surface Of bitumen and sand that
is later applied, and even with this
type of construction might be elimin-
ated by laying the pavement in sec
lions extending across the full width
of the street. This is possible and
has been successfully done where
concrete pavements have been laid
on streets wider than those at Ann
Arbor.
After the concrete has hardened
the surface is covered with hot btu
men applied with sprinkler wagon
designed for the purpose, having a
firebox under the tank to heat the
material. The 'bitumen is imme-
diately distributed evenly over the
surface of the concrete by brushing
with an ordinary street sweeper
broom, and the surface then covered
with sand. Approximately one-half
gallon Of bitumen Is applied per
SQUARE yard of surface and cubic
yard Of sand will cover about $50
square yards. making the wearing
surface from Y to y inch in thick
ness.
For the first pavement laid Mr..
Graves used ordinary coal tar OBJ
tained from the local gas works.
Later on he tried distilled tar and
considered that this was more sat
isfactory than the crude tar. This
year be has used ''tarviA."
The work at Ann AFbor is done
By the city, which has its own equip
ment, purchases material and hires
the labor. In 1919 with common
$50 a. aE 81 Ra al mar AaV. c.