The Hawaiian star. [volume] (Honolulu [Oahu]) 1893-1912, 1908-09-09

structed, they are turned over to the
management of some person or per-
sons who know nothing whatever re-
garding their operation. With but
little or no regard for their knowledge
of or experience with cement factories
or cement machinery, consulting me-
chanical engineers of reputation are
often employed to furnish plans and
designs for cement plants; they having
not only no particular interest in the
work of construction, but also having
no interest whatever in the operation
the enterprise.
The Hawaiian Islands Portland Ce-
ment and Lime Company is particular
ly fortunate in having Mr.. w. F. Cow
ham personally interested in the sue
cess of this enterprise. He will place
trained men to supervise the opera
ton, as well as the construction, sup
plying the company with competent
and experienced cement makers, and
train crew thoroughly to make this
one of the brightest successes of his
history. 1t is therefore absolutely
certain that every safeguard possible
is provided that will insure not only
the most improved plant and equip
ment, but also trained supervision.
The materials have been analysed by
number Of the best chemists in the
United States, connected with the ce-
ment and lime industries, viz, The
United States Geological Survey, of the
Department of the Interior, labora-
tories at st. Louis, Mo-; United States
Experimental Station for Hawaii; at
Honolulu; Peninsular Portland Ce-
ment Company, at Jackson, Mich; the
Henry e. Spackman Engineering Com
pany, at Philadelphia, Pa; Experiment
tai Station of the Hawaiian Sugar
Planters Association; G. F. Eckart,
chemist; and the Lehigh Valley Test
ing Laboratory, at Allentown, Pa, all
of whom have given the same analyses,
the samples Of materials were general
of the entire property, consisting of
one barrel each lime rock and lava
rock or clay ciinker; the burning made
by the Lehigh Valley Testing Labora-
tories shows a high-grade cement,
equal to any foreign cement.
THE LEHIGH VALLEY TESTING
LABORATORY.
Allentown, Pa, Thursday, March %,
1907.
Mr.. Frank l.. Winter, Honolulu, T. H.
Dear Sir: The seven-day report Oh
these tests of cement made for you
have been delayed by my absence from
the laboratory. The enclosed report
was written out and laid aside to
await my return.
AS you will see from this report, we
, have succeeded in making very salts
factory cement from your materials.
The neat tensile strength is not as high
{ as that of some brands on the market,
, which is due principally to the fact
that the clinker was ground finer than
= we intended. We had expected to
grind it about $50 fine on the 1OO-mesn
sieve, b1- the hard-burned clinker
= ground to readily that before we knew
it the material was 500 fine In fine
J ness and tensile strength it resembles
the best Edison Cement (The last
/ sample of Edison tested by us on the
, 18th inst showed 15q lbs at % hours
: 513 lbs, at 81 days neat and 161 lbs,
{ sand fineness 81 40 on the 100 and
5 $50 on the 200 sieve)
In making our tests, we used the
= standard method of the A. S. T. NJ,
being careful to make pastes and NOR
g tars of normal consistency. If a stiff
l or dry" mixture were used, as is done
in some laboratories. to make the bri-
S quettes break high, considerably high
= er results could be obtained If this
= cement was ground about 92qo fine QOC
= mesh), which is about the average
I fineness Of the Lehigh Valley brands
t it should break at 700 lbs. or over at
n seven days.
4 You will see from this that the result
e of our burning of your materials is
e encouraging. We could of course
l improve upon it in making another
= burning. In handling materials diff.
: fering so radically as do these from
:, the average cement materials, an ac,
: tual burning always gives more in.