The Fargo forum and daily republican. [volume] (Fargo, N.D.) 1894-1957, 1912-03-13
DECEPTIVE SPECIFICATIONS
FOR BITUMINOUS CONCRETE
Clear Misrepresentation Designed to Catch the Unwary By
Comparing Cheaper" Pavement With Bitulthic,
Is Charged By Warren Company
"SHEET ASPHALT" IS REAL name FOR THE MATERIAL
Cheaper" Substitute Has Wearing Surface Like That Prod
uct By Using Beach Sand With Mixture
Of Small Stones

per cent to 10 per cent by vstght@R
the hitumen."
Mineral Aggregate
The bituminous concrete specifics
tons above referred to as misleading
state that the mineral aggregate OF
the 'bituminous concrete" so-callSd
shall consist Of particles Of VARYING
sizes as follows:
Passing 200 mesh sieve 5 70 IL per
cent; passing 20 mesh sieve 10 30 20
per cent: passing 10 mesh sieve 90 To IS
per cent; passing Il inch ring 8
to 20 per cent: passing u inch ring
10 to 20 per cent
Note that from 40 to SO per cent
OF this construction is fine sand such
as will pass q screen having 100 or
mor openings per square inch and
that 8 to 90 per cent additional shall
be no coarser than coarse sand such
as is regularly used in sheet asphalt
pavements. and that 10 per cent of
he material shah pass u inch ring
and no material is permitted which is
not finer than " inch
Ordinary Sheet Asphalt.
This Is an ordinary sheet asphalt
or asphalt mortar pavement wear
ing surface like that produced by
using ordinary bank or beach sand
running from coarse sand } fine
sand. The small percentage Of mater-
ial passing II inch and remaining on
Il inch screen serves no useful pur-
pose, adds no stability to the mixture,
the particles OF fine stone being
~. ygoIvY nz.kA-..5 TaI-z a.
poorly fruitized cake. the only differ
ence being in the misleading name
given to the old construction.
Report at New Orleans.
At the New Orleans convention,
Jan. S-13. 1912, Of the Association for
Standardizing Paving Specifications,
a report was adopted, referring Il
specifications similar to the above, %
the effect that this construction may
be classed as in the experimental
stage" ~
Such so-calIed "Bituminous Con-
crete as above referred TO should ba
named sheet Asphalt OF "Asphaltto
Mortar" II there ts any difference In
quality between the two constructions
it is in favor Of that designated an
SuSeL ASpualL DaChube OF tue great
er density. AS to stability, there Is
no material difference-the tendency
In both s being toward weaken~
ing the strength Of the construction
by the use of widely separated parti-
cles of aggregate about one-fourth
inch size.
Could any Fake be more clear
than the naming Of such a pavement
"Bituminous Concrete" Could any
thing be more unfair In competition
than a claim, designed to catch tha
unwary that such a construction is
anything Ike "Bitulithic" OF that 1t
Is 'Just as good but cheaper" OF
course It is cheaper, because sand 70
cheaper than stone and can be handled
more cheapIy.
We have no quarrel with this caass
OF construction. but let its promoters
call 1t by its real name sheet AS
phalt" n "Asphaltic Mortar and not
attempt to mislead by giving q miss
representative name to an old cons
struction C"Sheet AsphaIt''), the mor~
its and dement's OF which are we'll
known Warren Brothers Co, SO
Temple Place. Boston, Mass.