The Cairo bulletin., 1912-09-06


complete, throughout its re
length. one zach below the dc
hereinafter specified for the centeI
line of the said brick pavement
when the same has been completed
Concrete Foundation,
Section 8 Gp0a thc said sub
grade and firm earth surface so pre-
pared and shaped as atorc ,il, shall
be laid or spread 70 atinn OF
Portland cement concrete, Of the
uniform thickness OF five 80 in
ehes. eomp6sed of one 10 part OF
Portland cement and eight esq parts
Of washed. river gravel F,p1
ing from gravel of t. Inches
Ia diameter down to arse sand, aad
the same shall be graded 50 tnat
The gravel and sand shall not con-
tain more than twenty t2ul per
cent y0ids, 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 unit! each piece
OF gravel is thoroughly covered with
molar.
/ The concrete thus prepared small
be Immediately placed in the work
| and b. spread and thoroughly com
! pacted by rammiu@ until free m4
tar appears on the surface. To
whole operation OF mixing and lay
ling each batch of concrete shall be
done as eNpeaitiousy as possible
with sufficient number Of skilled
mea, and must be entirely complete
ed before the cement has begun tt
/ set. No ratempering Of concrete
shall be permitted. and any concrete
lin which the cement has begun tc
| set Shall be rejected,
said concrete foundation includ-
| Ing che gutter-tlags OF said com.
blned curb and gutter, shall be OF
( the width between the inner faces
+ of the curbs. Of thtrty--six $3.50 feet
east OF Commercial avenue and thir-
tty 800 feet west Of Commercial ave
Inue.
section ., All concrete to be used
in the work provided for by this or
dinanee may he mixed with suit.
able concrete mixing machine. bat
no such mixing machine shall be
Iuscl in mixing such concrete unit
| the machine t. be used In mixing
| such concrete shall have been first
approved by tho BOARD OF Local Inn
| proyements OF the said City Of Cairo
Sand Cushion.
| Section re-. Upon the foundation
thus prepared, as above required
| shall be spread a layer Of clean sane
lof the uniform thickness Of two (2)
Inches and upon this sand, as {
ttu hlon. shah be laid the paving
brick.
The Bricks
Section II. The lflcks shall bl
straight, regular in size ana shape
ialpl ffae grem flaws and cracks
i'rLay shall moi be lass than 2lax4xs
nor more than 2hX4XQ inches. Thes
sAal. be expressly made for paving
purposes and shall be hard ans
tough and thoroughly yitrliied, anc
must not absorb more thar tour pei
cent Of their WEIGHT In water after
be;ng broken ana immersed fol
forty-eight t4Sl hours Wien de
sired by the said Board OF Local I'm.
proyements or by the city Engineel
OF The CRY, the bricks shall be sub
mitted to test Of one CO hour ii
the National Brick Manufacturer.
Association Standard Rather, an(
under conditions prescribed by thai
association, and If the loss BY abrais
Ton during stch test exceeds twenty
(20b per cent. OF the original weigh
OF the bricks tested. then snch hrick'
shall be rejected They shall no
contain lime in such quantities a.
to cause disintegration or erackins
after being immersed in water ter
t1O) days
Nosed brick shall be used on tn
inside of the car track or tracks aat
switches or turnout tracks, Of III
said Cairo Electric and Trac,ioi
Company next to the rails Of sal,
track or tracks and switches or turn
oat tracks, and said noscd brick
shall be OF the same general dimen
sions and character rs the brick
| which are 10 b. used for the bal
anee Of said brick pavement
Laying the Bricks, Rolling and Wet
| ting Surface, &c.
! Section | ,. The bricks must 81
closely and evenly laid in tru
straight lines at right angles to tn
Icurbing, and all joints must b
! broken al least three t3l inches
Whole bricks only shall be used ex
rept in starting aud finishin
courses at the curb or at catch
basins, manholes, etc, in which cas-
nothnS but half brick shall be used
and in breaking bricks for this pur
! pose the Joints must be cut straigh
aud square with the tops and sides
Said bricks shall be laid upon thei