Free trader-journal and Ottawa fair dealer. (Ottawa, Ill.) 1920-1927, 1920-05-29

the mortar in handling the concrete.
After mixirg, the concrete llall bp
handled rapidly into lace and sue
cl5siyo patches deposited upon the
properly prepared sube ade in a con
tinuouJ operation completing sec
tons between expansion joints with
out the use of intermediate cross
forms CT bulkheads. The concrete
shall be struck off fer the entire
width Of the pavement and brought to
The establihsed grade by means of Il
lutte"
As soon as possible after the con
crete has been struck oft. it snail be-
rolled with an approved metal roller,
having d smooth, even surface arp.oH
imately six feet in length, not less
than eight go inches nor more than
twelve 02)' inches in diameter and
weighing not more than one hundred
(lJ0) pounds Said roller shall be
divided vertically through the c@lte'
50 that a one Cd inch space is left
to allow rolling on both sides OF the
protecting joint filler at the Same
time. The roller shall be provided
with a frame to which ropes shah be
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be pulled across the pavement.
The roller snail be operated at such
an angle with the center line OF the
pavement that it advances along the
pavement about two % feet for each
time across. The roller shall pass
from one edge of the pavement to the
other, and at TRAVERSE joints shall
be set over the projecting joint-tllel
so that rolling may be done on botE
sides of the joint at the same time
and without interfering with the pc
stiOn Of the jOint-iIller. After the
roller has covered given area in the
manner described, the same area
shall be similarly covered by tbs
roller for not less than three (3J
times at intervals of from fifteen 0j)
to forty tiO) minutes, depending or
weather conditions, and as many
times additional as may be necessary
to remove excess water.
After the rolling has been com
plcted the pavement shall be finished
by two applications Of belt made
of canvas, not less than six 60 inches
wide and not less than two CD fee
longer than the width Of the pave
ment. The belt shall be applied witt
a combined croSsWisc and longtud
inal motion. For the first applca
ton vigorous strokes at least twely'
inches long shall be used. and tht
longitudinal movement Of the bel!
along the pavement shall be very
slight.
The second application Of the bel
shall be Immediately after the water
glare or sheen disappears, and the
stroke of the belt shall be not more
than four inches and the Longitudinal
movement shall be continuous for
ward movement
\ suitable bridge to span the Widtl
of the pavement shall be used to fin
ish the joints, no part Of which shat
come in contact with the finishes
work.
The finished surface Of the pave
ment shall not vary more than one
| fourth ca inch from the specified
contour.
| a notched straight-edge, ten feet il
length, shall be used over each trans
verse joint. The straight-edge shall
| be placed over the Joint, parallel t,
| the center line Of the pavement, ant
! moved across from side to side
When the finished Surface througI
| the joint shows to be high or low
/ concrete will be added or removed t,
bring the surface to its true shape.
/ The concrete adjoining tranyers
joints shall be dense in character anl
after rolling shall be finished with
wood float. which is divided through
the center and which will permit fin
/ ishing on both sides OF the filler &
the same time.
| The surface of the pavement for tn,
distance of eight (S) inches on eaci
side of the joint filler shall be fin
ished with a metal trowel when tn,
concrete will have become sufficient!
hard to work, and the edges of tn,
Joint shall then be quarter-rOundet
with an edging tool having a radius
not greater than One-fourth ca inca
Par. IA. That as soon as the con
crete has hardened sufficiently To pre-
vent being pit:ed, the surface of The
pavement shall be sprayed with wateI
and shall be kept thoroughly wet foI
at least ten days. AS soon as it cal
he done without damage TO the con
crete, the surface of the payemen
shall be covered with nc. less than
/ two CD inches of earth, which cove1
shall be kept wet for at least tel
days. II necessary, freshly laid con
crete shall be protected by a canVa,
cover until it can be sprayed and GOV
cred as aforesaid,
Par = Thai if at any time div