The Cairo bulletin., 1909-07-28

| the grading is once completed auc
finally and thoroughly rolled through
out, the street shall be well and sc
curely blocked off so as to prevem
vehicles from entering thereon, OK
cept those containing materials fo
the work, and in that case the sur
face or subgradc snail be securcl,
protected by planks.
Section T. The ;op Of the gutter
| flag shall be continuation OF the
| curve or arc Of the top surface OF the
| finished pavement. The combination
Ycurb and gutter shall be cCC5tructet
with joints eight go feet apart II
he following described manner; said
| concrete is to be prepared from
Washed, river gravel sand and Port
and cement and shall consist Of two
t2) courses The FIRST course shall
be the bottom course ard shall be
I've 60 inches in depth, and shall be
aid on eight tSl inches of clean Elm
lers thoroughly moistened and
amped to conform To the outline oi
he form for the combined curb and
utter. The second course shall he
he finishing or wearing course or
urface and the same shall be enc %
nch In depth
The bottom course shall he com
'ostd of one O. part Of Portland ce-
nent and five 90 parts of washed,
liver gravel OF sizes ranging from
,rayel of two (2) inches in diameter
town to coarse sand, and the same
hall BE graded so that the gravel and
and shall not contat0 more than
twenty (201 per cent voids, and the
anne shall be entirely free from
nui, dirt, dust ard loan. The gravel
and cement used ia constructing this
bottom course shall first be thor,
oughly mixed dry and sufficient clean
water shall then be added by slowly
sprinkHng to give tho mixture the
proper consistency AID the whole
shall he constantly stirred until tho
anne is thoroughly mixed This
mass shall he spread in forms upon
he ciuder foundation and shall ho
ahmed until all interstices are thor
}ughly filled with the mortar. par
icular care beirg taken that this
bottom course is we'll rammed and
consolidated along the outer edges.
After this bottom course is com
lIetcd and before it has had time to
begin to set, the finishing or wearing
curse shall he added The finishing
course shall con2ist Of A stiff mortar
composed Of ore (D part of Portland
cement and one aud one'half 05l
parts of clean, sharp, coarse sand
aud shall be laid to the depth Of one
On inch and shan be carefully
smoothed to an even surface. which
after the frs setting takes place,
must not he disturbed by additional
rubbing.
The curb and gutter shall be- pro
tectod from the sun and wind for
twentytcur (2n hears after the com
plctlou. during which time 1t shall he
kent moist by spriltIing
The~tops or upper Edges Of the sal
curbng on both sides of said pave
ment shall he. when finished com
plote, throughout its entire length
one inch below the grade herein
after specified for The center line of
the said brick pavement when the
ca mo log baou gnv,,I,.aI
Concrete Foundation.
Section s. Upon the said suhgrad'
and firm earth surface so prepared
and shaped as aforesaid, Shall be laid
or spread a foundation of Portland
cement concrPto, Of tine uniform
of five (5l inches, composed
Of one 0) part Of Portland cement
and eight tS) parts Of washed, river
gravel Of sizes ranging from gravel of
-wo ~ inches in diameter down tol
coarse sand. aud the same shall he
graded so that the gravel and sand
shall rot contain more than twentyl
'2oD Ter cent Yields, and the same
shall be entirely free from mud. dirt. !
lust and lcam and shall be screeaed
when necessary. Tho gravel and &c
nent shall be thoroughly mixed dry |
md sufficient clean water shall tire
1e slowly added to give the mixture |
he proper consistency and the same
hall be thoroughly worked over with
noes. The concrete shall then be
urnod and mixed "1;l each piece Of
;ravcl is thorcnr.ly covered with
mortar
Tho concrete thus prepared shall
'e immediately placed IN the work.
nd he spread and thoroughly com
acted by rammiug until free mortar
Upcars on the surface The whole
p"ration Of mixing aud laying each
'atch of concrete snail DC done as OK
,ditiCusly as possible with a SUI
Client nuIhcr Of SKILLED mo-. and
must be entirely completed before
be cement has begun to set No re
importing Of concrete shall hh per
liuod, AMI any concrete in which the
ement has begun to set shall be r..
actcd
Section 2 All cu-cretn 10 he used
, b,o |