The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-08-04


Mortars used in pointing shall be COM
posed of neat Portland cement modef-
ately slow setting, and shall show in one
week. after setting two hours IN ar and :
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
its immediate use. and none shall be used
which has begun to set.
cement and a 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
CONCRETE.
The stone shall be broken SO that the
greater amet shall net exceed three
inches. It 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 flied
with mortar, but not more thar three
parts of stone shall be added to one part
of mortar. All material must be actually
measured in bulk.
Concrete must be Immediately deposits
ed in the work after mixing and placed
carefully. 1t must not be dropped from a
height. It hall be laid in horizontal lay
ers, not exceeding nine tl inches thick.
and thoroughly ramIned until the stone is
covered with mortar, and until a film OF
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 confne the concrete
to the shape and dimensions shown In the
plans.
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
of 1900 pounds per quare inch, must be
11ae1 Euarzr hrick n111ct he wet nv i'm
mersion before laying and must pc laiq
In full mortar joints on bottom, sides and
ends, not exceeding three-eighths OF an
inch thick. All brick work shall be prop
eriy bonded.
EARTH DAMS.
The top soil and all vegetable matter
shall be removed from the area TO %
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 usec
for building the outer toe Of the dam;
A concrete core-wall of a proper thick
ness shall extend the entire length OF thf
dam and from the high water Level dowi
into the material underlying the EN-
bankment to sound rock or some othel
jmperyious material.
The earth used in the embankment shall
be carefully selected of the best mate
rials. mixed, If necessary. TO secure i'm
| nervousness TO water. The earth Snai
| be spread upon the embankment. IN leye
layers not exceeding SIX tHcfieS III ah.SH
| ness. and narrowed. wet down and rolled
SO as to be thoroughly compact.
The slopes of embanknent shall not D.
! sleeper thar one foot rise to two-foo
base; they shall be finished true ant
| smooth and protected on the water SID
with suitable paving and on the other sid.
| either by paving or by dressing, with si'
| inches of soil. and sodding or SEEDING
with grass seed acceptable to the Engi
neer.
rrrIz. ~ --.-fr t. o1ro-fofodr all uqfo
| chambers. gatehouses, effluent pipes Of
| eulverts. conduits and tunnels shall D.
| carefully cleaned out. The su~rroundins
| grounds. the reservoir lands and rights O.
way shall be cleared of all rubbish an'
temporary structures and left in a nea
and p~resentable condition.