The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1912-09-04

the finished pavement The combi-
nation curb and gutter shall be con-
structed with joints eight 60 feet
apart in the following described
manner; Said concrete is to be pre-
pared from washed. river gravel,
sand and Portland cement and shall
consist of two CD courses. The
first course shall be the bottom
course and shall be five (5l inches
in depth, and shall be laid on eight
Isl inches of clean cinders thor
oughly moistened and tamped to con-
form to 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 enc III inch in depth,
The bottom course shall be COM
posed of one CD part of Portland
cement and five CD parts Of wash
ed, river gravel of sizes ranging
from ravel of two CD 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 t20) per cent.
voids, and the same shall be entire
ly free from mud. dirt, dust and
loan. The gravel and cement used IN
constructing this bottom course shall
first be thoroughly mixed dry and
sufficient clean water shall then be
added by slowly shrinking 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 we'll rammed and
along the outer edges.
After this bottom course is CON-
pleted and before 1t has had time to
begin to set. the fini LAG or wear
ing course shall be added, The fin
ishing course shall consist of stiff
composed OF one t1) part Of
Portland cement and one and one
half tf15 } parts of clean, sharp,
coarse sand, and shall be laid to the
depth Of one tD inch and shall be
carefully sInoothed to an even sur
face. which, after the first setting
takes place, must not be disturbed
by additional rubbing.
The curb and gutter shall be pro-
tected from the sun and wind for
twenty-four CAY hours after the
during which it shall
be Kept moist by sprinkilng.
The tops or upper edges Of the
said curling on both sides of sahf
pavement shall be, when finished
throughout its entire
length, one inch below the grade
hereinafter specified for the center
line of the said brick pavement
when the same has been completed
The tops or upper edges of the
said eurbing on both sides of said
pavement shall be, when finished
throughout its entire
length, ono inch below the grade
hereinafter specified for the center
line of the said brick pavement
when the same has been completed.
Concrete Foundation.
Section Z Upon the said sub
grade and firm earth surface so pre-
pared and shaped as aforesaid. shall
hc laid or spread a foundation of
Portland cement concrete, Of the
thickness of five (5) In
ches, composed of one % part of
Portland cement and eight Isl parts
If washed, river gravel of sizes rang
ing from gravel of two CD inches
IN diameter down to coarse sand, and
the same shall be graded so that
the gravel and sand shall not con-
tain more than twenty (20) per
cent voids, and the same shall be
entirely free from mud, dirt, dust
and loan and shall be screened when
necessary. The gravel and cement
shall be thoroughly mixed dry and
sufficient clean water shall then be
slowly 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
motar.
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 lay
ing each batch of concrete shall be
done as expeditiously as possible
with sufficient number of skilled
men, and must be entirely complete
ed before the cement has begun to
set. No retempering Of concrete
shall be permitted, and any concrete
In which the cement has begun to
set shall be rejected.
Said concrete foundation includ-
ing the gutter-flags Of said com
bined curb and GUTTER shall be OF
the width between the inner faces
Of the eurbs, OF thirty--six t3e) feet
east OF Commercial avenue and thir-