Fergus County Democrat., 1916-06-22

| The stone storage department is di,
VIded into sections to contain tho
white rock the average rock and the
Eypsite, allowing either material to
be used. Beneath the storage is A
tunnel with a conveying belt, and the
material is conveyed from this depart
nleut by merely opening slides iii the
bins or sections.
I From the stone storage department
the material is conveyed TO the bins
over the rotary dryer, ana from thls
point is passes through cylindrical
rotary dryer, six feet in damete" and
+ 40 feet long. This lries the material
and prepares il for the finished pull
! cr'Zing
4 From the rotary dryer the gypsum
is elevated to bins over the pllVerlH-
( ing mills and in passing through the
grinding machines Il is ground to an
impalpable powder DIS fine as flour.
The actual manUeaC turing change oc-
ours in the calcining process and this
4 is secured by the application OF heat
raising the temperature to from 30o
to $50 degrees Fahrenheit. This tenn
peratllre libcrates about ID per cent.
of the average of 20 per cent. Of the
water of disqualification leaving per
cent. of the water of hydration in the
material.
, The calcined produce is passed from
the kettles into hot pits and from that
rOint elevated and conveyed to the
stock house department.
| In the stock house the mixing ma
chimes add materials to the stucco III
! - vrnI Inc <Nf ~ u G.
ters, finishes and gypsum products.
| Having completed the mixing the
\ finished product is sacked in cotton,
| Jute or paper bags and loaded into
| cars for delivery to the distributor
and consumer.
| In addition to the various manufac-
turcd plasters. the Hanover works will
produce land plaster, crushed gypsum
for cement plaster, gypsum tile for
fire proofing and partitions, plaster
board.
As a Construction Material.
Having reviewed the manufacturing
tho slue of gypsum products rs con
struction material, and that value will
be discussed:
1drdneSS.
Stucco, or plaster OF paris is a
Hydraulic cement of very rapid hard
ching qualities, and, with the addi-
tion of water. it resumes its former
state of rock. The setting or hard.
cning makes the material valuable for
strengthening a building, particularly
buildings CT the frame class In de-
! veloping the "set' or hardness. plas-
ter will stand breaking pull or strain
Of 100 pounds to the square inch, and
tliis gives an idea as to its strength
Durability.
The durability of gypsum plaster is
rather distincly proven by the fact
that the mural decorations in Egyptian
tombs are in perfect condition after
q period of 1000 years. In addition
we find many works of art in the Ro-
man period manufactured from plaster
are found, and after ages of exposure,
still retian beauty and prove the dura-
bility of the work
Quick Setting.
The wall plasters manufactured
from Gypsum are quick and rapidly
hardening materials. This gives a
builder or owner the use of his build
ing immediately after the plastering
is completed. AS the plaster work
drys very rapidly, you do not have that
damp condition of the rooms very
common with the other forms of plas-
terng
Fire-Proofing.
And gypsum product has a high re-
sistance to fire, and gypsum plaster
walls, block or plaster board, will very
materially retard fire, even in a
frame building
Sound Proof.
The Hanover gypsum tile or block
is go per cent NOR sound proof than
any other material including clay tile,
and this is particularly more impor-
tant in building modern homes, hos
pitals.. apartment houses and sound
proof hotels, and buildings of that
class. In addition the gypsum tile
walls are fire proof, light in weight
and can be altered by cutting without
waste or loss.
Convenience.
The gypsum plasters are a product
prepared fer use, requiring only the
addition OF water. or water and sand,
ana that lnsures the correct and prop,
or usage OF the material.
In general the real merits of gyp.
sum products as construction material
are receiving the recognition merited
and the future for the material and it's