The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1910-04-18


ling course shall be added. The fin
ishing course shall consist of stiff
mortar composed of one "a part o
Portland cement and one and one-hal
tlh) parts of clean, sharp, coarse
sand and shall be laid to the deptf
lof one % INCH and shall be care
fully smoothed TO an even surface
which, after the first setting takes
place, must not be disturbed by adj
ditional rubbing.
The curb and gutter shall be pro
tected from the sun and wind fol
twenty-four f24) hours after the com
pletion, during which time it shall bt
kept moist by sprinkling.
The tops or upper edges of the said
curbing on both sides OF said pave
ment shall be- when finished com
plete, throughout its entire length
one inch below the grade hereinaf
te. 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 aioresald, shall be laid
or spread foundation of Portland
cement concrete, OF the uniform
thickness of five go inches, com,
posed of one ~ part Of Portland
cement and eight (S) parts OF
washed, river gravel of sizes ranging
from gravel Of two (2) 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 (20) per cent.
voids, and the same shall be entire
ly free from mud, dirt, dust and loan
and shall be screened when neces-
sary. The gravel and 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
naeted by ramming until free NOR
tar appears on the surface. The
whole operation of mixing and laying
Zach batch of concrete shall he done
as expeditiously as possible with ID
sufficient number of skilled men, and
must be entirely completed before the
cement has begun to set No re-
of concrete shall be per-
llitted, and any concrete in which the
cement has begun to set shall be re-
ected,
Section Q. All concrete 10 BE- usei
n the work provided for by this or
finance may be mixed with a suitable
mixing machine but no such
machine shall be used in mixing such
concrete until the machine to be
ised in mixing such concrete shall
lave been first approved BIZ the
3oard of Local improvements of the
aid City of Cairo
Sand Cushion.
Section 10. Upon the founfarJn
hus prepared, as above required,
hall be spread layer OF clean Sand
If the uniform thickness of two ~
inches; and upon this sand. as cush-
on. shall be laid the paving brick.
The Bricks.
Section II. The bricks shall be
regular in size and shape,
nd free from flaws aad cracks. They
hall not be less than 2iax4xS nor
mere than 315x4x9 inches. They shall
10 expressly made for paving purpos-
s and shall be hard and tough and
thoroughly vitrified, and must not all,
orb more than four per cent. of their
weight in water after being broken
nd immersed for forty-eight (fSl
Iours. When desired by the said
Board of Local Improvements or by
he City Engineer of the City, the
,rlcks shall be submitted to a test Of
ne Q) hour in the National Brick
manufacturers Association Standard
sattler, and under conditions pro
cribed by that association, and if the !
oss by abrasion during such test eX-l
eeds twenty 600 per cent. Of the
riginal weight of the bricks tested |
hen such bricks shall be rejected |
hey shall not contain lime in such !
uantities as to cause disintegration |
r cracking after being immersed in
fater ten f10) lays.
Nosed brick shall he used on tho !
aside of the car track or tracks and !
witches or turnout tracks. OF the [,
aid Cairo Electric and Traction Com
any next to the rails of said track
r tracks and switches or turnout
racFs, and said nose bricks shall be
( the same general dimensions add
haracter as the bricks which ate
, he used for the balance OF said
rick pavement.
aging the Bricks, Rolling and Wet
ting Surface, &C.
nv H..