The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1913-03-15

brick pavement between the afore'
said points shall be finished smooth
and conform TO the aforesaid re-
! spective grades at said respective
points and shall be twelve tl2)
+, inches below the finished roadwa,
surface. On the sub-grade so pre-
pared thee shall he placed a iayel
OF concrete mixed In the proportion
! OF one part of cement. three pa :
of sand and six parts of gravel OF
broken stone This concrete fonndo.
ton shall be of such thickness thai
after being thoroughly tamped, Al
specified, the top surface thereof
shall be smooth and uniformly paral
| lei to and six t6). Inches below the
finished roadway surface. Said con
crete foundation shall be prepared
as follows:
az Tight platforms shall bt
provided of sufficient size to accom-
modate men and materials for thu
progressive and rapid mixing OF al
least two patches of concrete at Tho
same time. Batches shall not ex-
coed one cubic yard each, and small
patches are preferable. based upon q
multiple OF the number OF sacks tC
the barrel.
ca Spread the sand evenly upon
the platform. then the cement upon
the sand and mix thoroughly until
of even color. Add all the water
necessary to make thin mortar and
spread again; add the gravel or tha
/ broken stone. which, Ii dry should
first be thoroughly wet down. Turn
the mass with shovels until thor.
ough y incorporated. and all the
gravel or stone is covered with NOR
tar; this will require the mass to be
turned on the mixing board not less
than four times.
t3) Another approved metho
which may be permitted at the OPP
ton OF the engineer. is to spread tho
sand, then the cement and mix dry.
then the gravel or broken stone, add
water and mix thoroughly as above.
The concrete shall be of such con-
sistency that when dumped in place
it will not require much tamping /.
shall be spaded down and tamped
/ sufficiently to level off. after which
he water should rise free Y to the
surface.
Section g. Upon the base pre-
pared as above specified shall be
spread layer of sand about two
inches in thickness: upon this sand
cushion, the paving brick shah be
laid The brick for this work shall
be first quality re-pressed hard
burned paving brick. such as now
in place on the westerly side OF said
Commercial avenue, and the quality
/ and color OF the brick must be uni
form. The texture, hardness and
vitrification of the brick shall be
uniform throughout. Any brick
which is soft or brittle must not be
used. No inspection OF the brick on
cars or in any piles will be made by
the engineer or any of his subordi-
mates, and the right to reject anA
require the contractor to remove
any brick until the pavement is fin
ally accepted is reserved.
The brick shall be from eight
inches to ten inches long; from -four
inches to four and one-quarter
inches deep and from three to three
and one-half inches wide. The
brick shall be laid upon the sani
cushion above described with the
longer dimensions at right angles 70
the center line OF the street, the
four inch dimensions approximately
vertical. The top surface is to be
in such a position that after ram
ming, as hereinafter provided for, it
will accurately coincide with TIL,
proposed finished surface elevations.
Continued ON Page Fdve.)