The public ledger. [volume] (Maysville, Ky.) 1913-1968, 1916-02-12

plans TOT same on ME.
CONCRETE FOUNDATION.
80. QUALITY OF CEMENT-An
cement used on the work shall be best
quality American Portland cement
newly manufactured. well housed, and
preserved dry until ready for use. All
cement TO be approved by the Engi-
neer. Any cement without makers
name will be rejected. Cement shall
be subject TO the inspection and tests
made in accordance with the meth
cd adopted by the American Society Of
Civil Engineers and the American So
oiety for testing material, and all ce-
ment offered must meet the require
ments of their specifications adopted
by the societies mentioned.
40. CEMENT TESTS-All re-
quired samples for testing must be
furnished by contractor. A sufficient
supply of cement to prosecute the
work must be kept on hand. All re-
jected cement must be Immediately
removed from the work.
Al. QUALITY OF SAND-The sand
shall be clean and sharp. entire
ly free from loan, vegetable matter or
any other foreign substance. Any
! sand that is not accepted must be re-
moved at once from the work.
AZ. SIZE OF STONE-Stone for
concrete must be clean, sound lime
stone or other stone equally good, free
from clay, shale, soapstone, or other
foreign material, broken to sizes not
larger than will pass in any direction
through q two and one-half (21a) inch
ring and be rejected by a one U) inch
ring.
AZ. PROPORTION OF STONE,
SAND AND CEMENT-The concrete
shall be mixed in the following pro-
portions and in the following manner /:
One 81 part cement and two and one
half (2ia) parts sand will be thor
oughly mixed dry and then enough
water added to make a mortar of the
proper consistency. TO this will be
added five 90 parts of stone, thor
oughly wet; the batch will then be
well mixed until each piece of stone is
completely covered with motar.
"A. HOW MlXED-Mixing by hand
must be done upon proper platforms
made for that purpose After each
batch is prepared il must be rapidly
handled into place and thoroughly
cOmpacted by ramming until free NOR
tar fiushes to the surface. The pro-
portions for every batch must be de-
termined by measurements. No walk
ing, wheeling nor working upon the
concrete will be allowed until it has
sufficiently set. If a mixing machine
ig nGnH N1lntariaI in tbn
ton will be used
As. UPPER SURFACE-The upper
surface must conform exactly to the
finished crown of the street and five
end one-half (51a) inches below same
Proper care must be taken to prevent
sun from checking concrete
SAND CUSHION.
46. SAND CUSHI0N-A layer OF
sand one and One-half Q1aJ inches
thick shall be spread upon the con-
crete foundation thus prepared, tC
serve as an equalizer for the brick
pavement. Surface to be gagged by
templet conforming to true cross
section of street. Sand be used for
this purpose shall be equal in every
respect to that used for concrete work
BRICK PAVEMENT.
n. SIZE-The blocks must be
bard, burned, commonly known as
street PAYERS. The dimensions must
be approximately three and ore-haif
(31a) inches by four "a inches by
nine 90 inches No blocks varying
moro than One-half (1s) inch in di-
mansions from the above standard will
he accepted.
As. SHAPE-Blocks must be true
of form and rectangular in shape, tho
name OF the maker to be stamped on
each block a wire cut lug block,
square edged with one side straight
and Tugs cut on the other will be re-
quired. On steep grades blocks will
be cut with bevcl as directed.
asa. Or reDressed block with
squared corners, with Tugs cast on one
side will be used-lugs must provide
approximately q 3-16 inch joint be-
tween the blocks when laid
40. QUALITY OF MATERIAL-Th
quality of blocks must be uniform
They must be made from a shale or
admiXture of shales. perfectly suitable
for the production OF a block for
street paving purposes. The blocks
must be free from cracks, flaws,
varying or breaks, and equal in every
respect to the samples which must be
Sled with the Engineer by bidders.
So BURNING-The blocks shalt be
burned as to secure maximum hard
ness and so annealed as to reach the
ultimate degree OF toughness. The
hlOnkG must no unifnrmlv hurnad All
under and overturned blocks will be
rejected. Blocks that are brittle will
be rejected. They must be a perfect
blending of the material in burning
The principal requirements-density
uniform texture, hardness, toughness,
vitrification-must extend throughout
the whole interior OF each block When
broken, the surface shall show no
variation in structure or indication of
Elimination.
81 TESTS TO BE APPLIED-The
block shall be subject to any or all OF
the tests. provided in the standard
adopted by the National Paving Brick
Manufacturers Association at their
annual meeting in 1911; and any
amendments thereto, and the blocks
shall not lose over 20 per cent on rat
tier test.
50. TEST OF BRIGHAM brick
which fails in any of the tests to be
applied shall be rejected. OF the sew
eral blocks that may be offered, the
Board of Council reserves the right to-
select any that may successfully
stand the tests applied. No make Of
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