The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-07-14

or proportions as will produce a mortar
of the above strength.
Mortars used in pointing shall be COM
posed of neat Portland cement, moder-
ately slow setting. and shal show in one
week, after setting two hours in air and
the remainder Of the time in water, a
tensile strength OF at least $50 pounds per
square inch of section.
When tested in cakes all cement shall
be free from cracking at the edges.
No mortar shall be mixed in advance Of
It's immediate use, and none shall be used
which has begun to set.
Cement and sand shall be thoroughly
mixed dry. by repeated turns and until
the mass has become homogeneous and
of uniform color. A proper proportion of
water shall then be added and the whole
quickly mixed.
The stone shall be broken so that the
greater diameter shall not exceed three
inches. 1t shall be sound and clean. The
stone shall be wet with water and then
thoroughly mixed with the mortar in
such proportions and manner that all
surfaces are covered and all voids filled
with mortar, but not more han three
parts of stone shall be added to one part
of mortar. All material must be actually
measured in bulk.
Concrete must be Immediately deposit
ed IN the work after mixing n placed
carefully. 1t must not be dropped from a
height. 1t shall be laid in horizontal lay
ers, not exceeding nine go inches thick.
and thoroughly rammed until the stone is
GONSItA WIFI laOIldf,4 anu uUtll Il ilitH u
water appears On the surface. All sur
faces upon which concrete is laid must
be wet before depositing the concrete.
Plank or timber forms must be employed
where necessary to conf1ne the concrete
to the shape and dimensions shown in the
plans.
BRICK WORK.
The best quality of whole. new brick,
burned hard entirely through. free from
injurious cracks. and with even, true and
smooth faces. with a crushing strength
used. Every brick must be wet by inn
mersion before laying and must be laid
in full mortar joints on bottom. sides and
ends, not exceeding three-eighths Of an
erly bonded.
The top soil and all vegetable matter
shall be removed from the area to be
covered by earth dams. This area shall
be cleared to the satisfaction of the En-
gineer. and the material removed there
from. which is sufficiently free from veg
etable matter. may afterwards be used
for building the outer toe OF the dam.
A concrete core-wall of a proper thick
ness shall extend the entire length of the
dam and from the high water level doWn
into the material underlying the en-
banknent to sound rock or some other
impervious material. !.
The earth used in the embankment shall
be carefully selected of the best mate
rials, mixed. il necessary. to secure inn
nervousness to water. The earth shall
ne spread upon the III lGNei
layers not exceeding six inches in thick
ness. and narrowed. wet down and rolled
so as to be thoroughly compact.
The slopes of embankment shall not be
sleeper than one foot rise TO two-foot
base; they shall be finished true and
smooth and protected on the water side
with suitable paving. and on the other side
either by paving or by dressing. with six
inches of soil, and sodding or seeding
with grass seed acceptable to the Engi-
EARTNG TIP
When the work is COMPLETED, all gate
chambers. g~atehouses. effluent pipes or
culverts. conduits and tunnels Shall b.
carefully cleaned out. The surrounding
grounds. the reservoir Iands~and rights of
way shall be cleared of aR rubbish and
temporary structures and left in a neat
and presentable condition.