Connecticut western news. [volume] (Salisbury, Litchfield Co., Conn.) 1871-1970, 1917-07-12
BLAST FURNACE STAG
Now Available for Building Purposes
and Road.makIng Material.


Stag, rendering it available for practi.
cal use.
Mr.. A w. Herbst, the treasurer of
the New England Stag Co., has fur
nished us with the following descrip.
ton of the uses to which their produce
may be put.
The adaptability of Blast Furnace
Stag as an aggregate for concrete is
now recognized by the Engineering
and Architectural professions in this
country. Although Blast Furnace Stag
AMI Lava are similar in chemical
analysis and manner of production,
and although the latter has been used
as far back as 1926 years ago in the
construction of the "Appian Way,
universally known as the Queen of
Roads,, it is only in recent years that
Stag has been used in this country for
reinforced concrete, con-
crete and as road building. Stag will
reduce the weight per cubic foot of
concrete and increase the compressive
strength of the concrete itself by at
least % per cent. The fact that it is
40 per cent lighter than stone or gravel,
reduces the cost of transportation and
saves at least 25 per cent in the cost of
labor for handling, mixing and placing
of the concrete.
Structurally it's PARTICLES have no
planes of cleavage. The faces presented
are very irregular and slightly pitted
which renders it possible for the matrix
of cement and sand to more nearly
attain the maximum strength.
AtThe crushed Stag can be screened and
graded to the exact sizes specified for
various types of work that demand the
more careful selection of suitable sizes
of aggregate.
With Stag aggregate, one does not
have to watch for loan, silt or clay in
its makeup, and because the material
has been subjected to from 1900 de.
grees to $500 degrees F. of heat, one is
assured that there are no grass roots,
pieces of wood, vegetable or othet
organic matter present.
A series of comparative tests con-
Quoted by Columbia University of New
York city, consisted of using Stag and
Trap Rock. These tests were made in
the presence of the representatives of
the Building Departments of New
York city, the Engineers Of the Public
Service Commission of New York, the
Erie Railroad and the Public Utilities
of New Jersey. In each
case the concrete cylinders were made
in l:2:4 mix, and were identical as to
the amount of Stag, stone, sand,
cement and water used. The results
of this series at the various periods
and the various ultimate strength in
pounds per square inch of each aggre.
gate proved that the Stag concrete
when % days old was ais per cent
stronger than stone, at three months
was Is per cent stronger than stone, at
six months was 16.9 per cent stronger
than stone and at IL months was 49,
per cent stronger than stone. The
average weight of the Stag used in
these tests was so lbs. per cubic foot,
and that of the Trap Rock 100 lbs per
cubic foot. The average weight of Stag
was 140 lbs. per cubic foot,
and that of Trap Rock concrete was
151 lbs. per cubic foot. The result of
these tests leaves but one conclusion,
shat Stag weighing 20 per cent less
than Trap Rock in bulk produced
which was 10 per cent lighter
than Trap Rock, and was 16. 8 per cent
greater in strength at the age when
reaches its maximum strength.
This evidence of strength is a result
Of the findings of one of the foremost
Technical Universities in the United
States. AS result of these tests, Stag
has been approved by the Building De.
partments of the City of New York d.
The Cities of Philadelphia, Newark,
Chicago, Cleveland, Toledo, Birming-
ham, Columbus, Trenton aud others
also specify and permit the use of Stag.
Stag produces concrete % per cent
stronger than gravel or trap rock, and
1t will naturally produce better results
in road construction. 1t not only
possesses every virtue that the other
road metals do, but vastly more in that
it possesses cementing qualities that
bind the aggregates together, which is
10 greatly to be desired.
Stag as a road metal for bituminious
is superior to stone owing to
It's inherent porosity. 1t has rough
porous surface with a holding power
.or the matrix or mixture not possessed
oy other materials. In the preparation
If the road metal for the various types
If patented pavements now in vogue, it
s necessary to first heat the stone in
order that it shall be thoroughly dried,
md then to mix the same with tar or
lsphalt for the cementing material.
Stag in it's formation has passed through
he heating and drying process by be-
ng created at a temperature which |
would cause the disintegration of stone
IT gravel, it is therefore free from all
lirt, foreign matter moisture. The
'ough and uneven surface of the Stag |
ends to produce the greatest holding !
,ower for the adhesive mixture. In |