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

tough and thoroughly yitrified. ant
must not absorb more than four pc
cent. of their weight in water afte
being broken and immersed fo
forty-eight t4S) hours. When de
sired by the said Board of Local I'm
provements or by the City lginee
OF the City. the bricks shah lie sub
mitted to test of one CD hour il
the National Prick Manufacturer
Association Standard Rather. ant
under conditions prescribed hv thu
association, and if the los 3 aolais
ion during such. test exceeds twenty
(20) per cent. OF the original weigh
of the bricks tested. then such bi isk'
shall be rejected, They shall mo-
contain lime in such quantities as
to cause disintegration or cracking
after being immersed in water ten
t10p days. 1895
Laying the Bricks, Rolling and Wet
ting Surface, &c.
Section H. The bricks must be
closely and evenly laid in true
straight lines at right angles to the
curbing, and all joints must DC
broken at Least three CD inches
Whole bricks only shall be used ex-
cept in starting and finishtne
courses at the curb or at catch
basins. manholes. etc, In which case
nothing but half brick shall be used ;
and in breaking bricks for this pur-
pose the joints must be cut straight
aud square with the tops and sides.
Said bricks shall be laid upon their
edges and shall be one course deep.
When the bricks have been laid,
the surface shall be made smooth by
rolling with 4 roller weighing not
less than three t3) tons nor more
than six t6l tons; or where rolling
is impracticable then by tamping
with ninety 600 pounds tamper
upon a twelve (l2l inch oak plank
at least six cd feet long.
The pavement shall then be thor
oughly wet by the contractor so that
all soft bricks can be detected and
all such bricks shall be removed and
replaced with good hard ones; ana
all defective bricks found in the
pavement shall be removed by the
contractor and be replaced with
good ones.
Expansion Joints,
Section IL. There shall be ex-
hansion jdints ,or cushions across
the pavement and at right angles to
the curbing, every twenty-five (25}
feet, and continuous like joint or
cushion between the paving and the
gutter, made OF hot asphalt or No.
six co pitch, one (il inch thick,
and extending from the top of the
paving down to the bottom of the
bricks.
The Filler.
Section 49, After the rolling OF
the brick is completed. the filler or
cement grout. which shall be com
posed of equal parts Of clean. sharp
sand and Portland cement shall be
made and applied in the following
manner:
The sand shall be dry and not ex-
ceeding one-third 1-3). of a bushel
together with like amount
Of Portland cement, shall be placed
in a box and mixed dry until the
mass assumes an even and unbroken
shade and then clean water shall be
added SO as to form a liquid of the
Of thin cream. From the
time the water is applied until the
last drop is removed and floated into
the joints of the brick pavement,
the grout shall be kept in constant
motion. The mixture shall be re-
moved from the box to the street
surface with a scoop shovel, the
same being all the while stirred in
the box as the same is being thus
and from the moment ii
touches the bricks, it shall be thor
oughly swept into the joints or
crevices. The work of filling should
be thus carried forward in line,
three tS) Of such boxes, as above de-
scribed, being used until an advance
of from fifteen (15) to twenty (201
yards has been made, when the same
force and appliances shall be turned
back and cover the same surface
again in like manner, except that
the mixture of the second coat may
be slightly thicker than the first
This process shall be continued
until all of the spaces between the
bricks are thoroughly filled. After
the joints are all thus flush with
or filled to the top of the brick and
time for evaporation has
been allowed so that coating OF
sand will not absorb the moisture
one-half " } Of an inch In thick
ness of sand shall be spread over the
whole surface; and in case the WORK
is subjected to a hot summer sun, ar
occasional sprinkling with water
sufficient to dampen the sand
should be followed for two or three
days The grouting thus finished
must remain absolutely free from
disturbance or traffic of any kind
for period of seven CD days.
Said brick paving, including the
gutterflags of said continued curt
and cllttnr shall be of the width be.