The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1909-07-26

ltiHpeu 10 CONFORM 10 tHe outline OF
the form for the combined curb and
gutter The second course shall be
the finishing or wearing course or
surface and the same shall be one 0)
inch in depth.
The bottom course shall be com
posed Of one ca part of Portland
cement and five 90 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
1 same shall be entirely free from
mud. dirt, dust ana foam. The gravel
and cement used in constructing this
bottom course shall first be thor
oughly mixed dry and sufficient clean
water shall then be added by slowly
sprinllling to give the mixture the
proper consistency and the whole
shall be constantly stirred until the
same is thoroughly mixed
This mass shall be spread in forms
! upon the cinder foundation and shall
be rammed until all interstices are
thoroughly filled with the mortar,
particular care being taken that this
bottom course is well rammed and
consolidated along the outer edges.
After this bottom course is com
pleted and before II has had time to
begin to set, the finishing or wear
ing course shall be aided. The fin
ishing course shall consist of stiff
mortar composed of one u part Of
Portland cement and one and one-half
| 1h) parts of clean, sharp, coarse
sand and shall be laid to the depth
Of 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
ditonal rubbing.
The curb and gutter shall be pro-
tected from the sun and wind for
twenty-four (2U hours after the com.
pletion during which time it shall be
kept moist by sprinking
The tops or upper edges of the said
curbing on both sides or said pave
ment shall be, when finished complete
throughout its entire length, one inch
below the grade hereinafter specified
for the center line or the said brick
pavement when the same has been
completed.
Concrete Foundation.
Section s. Upon the said sub-grade
ard firm earth surface, so prepared
and shaped as aforesaid, shall be laid
or spread foundation of Portland
cement concrete of the uniform
thickness of five 60 inches, com.
posed of one () part of Portland
cement and eight 81 parts Of
washed, river gravel of sizes ranging
from gravel of two CD inches in
diameter down to coarse sand, and
the same shall he graded so that the
gravel and sand shall not contain
more than twenty (20) per cent
voids, ana 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
fcent clean water shall then be Slow.
ly added to give the mixture the
lproper 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 rammine 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 a
sufficient number Of skilled men. and
must be entirely completed before the
cement has begun TO set No re-
| tempering of concrete shall be per.
mittod and any concrete in which the
cement has begun to set shall be re-
| iectcd.
Section g. 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 be used in mixing such
concrete until the machine 10 be
used in mixing such concrete shall
fhavc been first approved by the
Board Of Local improvements of the
said City Of Cairo.
Sand Cushion.
Section 10 Upon the foundation
thus prepared, as above required.
shall be spread a layer Of clean sand
of TIE uniform thickness of two C2D
inches: aud upon this sand as a cusb-
ion. shall be laid the paving brick.
The Bricks.
Section II. The bricks shall be
straight, regular in SIZE and shape.
and free from flaws and cracks. They
shall not be less than 2hxixs nor
more than 3hXfx9 incnes. They shall
be expressly made for paving purpos-
es and shall be hard and tough and
thoroughly vitTifipd and must mt al,