The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1910-04-20

iiiNiidl Noulpustu OF one III part
/ Portland cement and one and one-hal
tl1e) parts of clean, sharp, coars,
sand and shall be laid to the dept
Iof one "a inch and shall be care
fully smoothed to an even surface
which, after the first setting take
place, must not be disturbed by adj
ditional rubbing.
The curb and gutter shall be pro
tocted from the sun and wind 70
twentyfour (24) hours after the com
! pletion, during which time it shall b.
kept moist by sprinkling.
The tops on upper edges of the sale
curbing on both sides of said pave
ment shall be. when finished com
plete. throughout its entire length
one inch below the grade hereinaf
ter specified for the center line of the
said brick pavement when the same
has been completed
Concrete Foundation.
Section S. Upon the said sub-grade
and firm earth surface SO prepared
and shaped as aforesaid, shall be laio
or spread a foundation of Portland
cement concrete, Of the uniform
thickness of five 60 inches, com
posed of one % part of Portland
cement and eight (Sl parts Of
washed, river gravel of sizes ranging
from gravel of two ca inches in
diameter down to coarse sand, and
the same shall be graded so that the
gravel and sand shall not contain
more than twenty (20l per cent
voids, and the same shall be entire
~ free from mud. dirt, dust ana loan
and shall be screened when neces
sary. The gravel ana cement shall
be thoroughly mixed dry and suf
ficent clean water shall then be slow.
~ added to give the mixture the
proper consistency and the same
shall be thoroughly worked over with
hoes. The concrete shall then be
turned and mixed until each piece OF
gravel is thoroughly covered with
mortar.
The concrete thus prepared shall
be Immediately placed in the work
and be spread and thoroughly com
pacted by ramming until free NOR
tar appears on the surface. The
whole operation Of mixing and laying
each batch of concrete shall be done
as eXpeditiously as possible with d
sufficient number Of skilled men. aud
must be entirely completed before the
cement has begun to set No re-
teinpering of concrete shall be per.
ndtted. and any concrete in which the
cement has begun to set shall be re-
ieeted,
Section 9, All concrete TO be used
in the work provided for by this or,
dinance may be mixed with a suitable
concrete mixing machine. but NO such
machine shall he used in mixing such
concrete until the machine to he
used In mixing such concrete shall
have been first approved by the
Board Of Local improvements Of the
said City Of Cairo
Sand Cushion.
Section 10. Upon the foun1atlon
thus prepared, as above required,
shall be spread a layer OF clean sand
of the uniform thickness of two (2)
inches; and upon thi sand, as eush-
ion shall be laid the paving brick
The Bricks.
Section H. The bricks shall be
straight, regular in size and shape,
and free from flaws and cracks. They
shall not be less than 21ax4xS nor
mere than 3bX4x9 inches. They shall
be expressly made for paving purpos-
es and shall be hard and tough and
vitrified, and must not alb
sorb more than -four per cent. Of their
weight in water after being broken
and immersed for forty eight (lS'
hours When desired by the said
Board Of Local Improvements or by
the City Engineer of the City, the
bricks hall be- submitted to test of
one % hour in the National Brick
Manufacturers Association Standard
Rather, and under conalrons pre-
scribed by that association. and If the
loss by abrasion during such test eX-
ceeds twenty 900 per cent, Of the
original @eight OF the bricks tested,
then such bricks shall be rejected.
They shall not contain lime in such
quantities as to cause dislntegration
or cracking after being immersed in
water ten Go) days.
Nosed brick shall be used on the
IN de of the car track or tracks and
switches or turnout tracks, of the
said Cairo Electric and Traction Com
pany next to the rails of said track
or tracks and switches or turnout
tracks, and said nosed bricks shall be
Of the same general dimensions and
as the bricks which are
10 be used for the balance of said
brick pavement
Laying the Bricks, Rolling and Wet
ting Surface, &C.
Section IL. The bricks mutt be
closely and evenly laid in true STRAIGHT
ines at right angles to the curbing,
md all joints must be broken at
past thrpn (g1 iuphea Whole bricks