The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1907-06-03

cement and one and one.half uh)
parts Of clean, sharp, course sand and
shall be laid to the depth of one (i)
inch and shall be carefully smoothed
to an even surface. 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 (24) hours after the COW
pletion during which time ii shall be
kept moist by sprinkling.
The tops or upper edges of the said
curling on both sides of said pave.
ment shall be, when finished com
plete. throughout its entire length
three inches below The grade herein.
after specified for the center line Of
the said brick pavement when the
same has been completed.
Section Z. Upon this snbgrade and
| firm earth surface, SO prepared and
shaped as aforesaid, shall be laid or
spread foundation of Portland ce-
ment concrete, Of the uniform thick
ness Of five 90 inches, composed OF
one (1J part of Portland cement three
CD parts of clean sharp sand and
! six Ca parts of hard limestone broken
or crushed into sizes which will pass
through a ring of two CD inches in
side diameter. At shall be free from
ed when necessary. The sand and CO.
ment shall be thoroughly mixed dry
and then be made into mortar Of the
proper consistency and thoroughly
worked over with hoes. The broken
stone, thoroughly drenched with water,
but containing no loose water in the
heap. shall then be added to the NOR
! tar in the proper proportions. The con-
crete shall then be turned and mixed
until each piece of stone Is thoroughly
covered with mortar. The concrete
thus prepared shall be Immediately
placed in the work, and be spread and
thoroughly compacted by ramming UNI
| til free mortar appears on the surface
The whole operation of mixing and
laying each batch of concrete shall be
done as expedtiously 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
permitted and any concrete in which
the cement has begun TO set shall be
rejected.
Section s. Upon the foundation
thus prepared, as above required, shall
be spread a layer of clean sand Of
| the uniform thickness OF two (2l in
ches: and upon this sand, as cush-
| ion shall be laid the paving bricks,
They must be closely and evenly laid
| In true straight lines at right angles
to the curbing; and all joints must
| be broken at least three CD inches.
| Whole bricks only shall be used ex-
cept in starting and finishing courses
at the curb or at catch-basins man
holes, ETC. in which case nothing but
half bricks shall be used; and IL
breaking bricks for this purpose the
Joints must be cut straight and square
with the tops and sides. Said bricks
shall be laid upon their edges and
shall be one course deep.
All the work throughout must be
done by skilled men and with the aid
of proper tools.
When the bricks have been laid, the
surface shall be made smooth by roll
| ing with a roller weighing not less
.
six 60 tons; or where rolling is i'm
practicable then oy tamping with a
ninety 900 pounds tamper upon a
twelve 12) inch oak plank at least
six 60 feet long.
The pavement shall then be thor.
ourghly wet by the contractor so that
all soft bricks can be detected and all
such bricks shall be removed and re-
placed with good hard ones: and all
defective bricks found in the pave
ment shall be removed by the con
tractor and be replaced with good
ones.
Section g. The finished sub-grade,
the concrete foundation, the sand
cushion and the brick paving thereon
shall be parallel to each other and
have the shape and curve above de
scribed and the center line of the top
and finished surface of the paving
when completed shall be laid to the
following described grades, namely;
to the grades of Washington oyenue
from said Second street to the north
line of the said Thirty-tifth street
which are as follow from the north
line of said Second street to the
north line of Twenty first street the
grade is the top surface of the stone
monument al the southwest corner of
Commercial avenue and Sixth street, |
generally called and known as the
thi ty-four (3D foot grade: from said
north line of Twenty-first street TO the |
south line of Twenty-second street, |
the grade gradually falls two feet, |
or to a grade or elevation of thirty |
two (32) feet: and said thirty-two |
(32l foot grade continues to the north |
line of Thirty fourth street, and from |
thence il gradually rises two feet, or
q the thirty-four (34D foot grade at
tho south line of Thirty-fifth street,