Om Materialprøvningens Udvikling i Norden
Og om Statsprøveanstaltens Virksomhed
År: 1909
Sted: Kjøbenhavn
Sider: 185
UDK: 6201(09)
Emne: Trykt hos J. Jørgensen & Co. (M. A. Hannover)
On the development of testing of materials in the north and on the work of the danish states testing laboratory in Copenhagen (english translation)
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143
fig. 15 the same after a part of the outer wall has been broken
down so that the wrong side of the transverse wall is visible.
It appeared from the experiment that the bricks were not
so much vitrified that the brickwork could anywhere be ob-
served to have settled perceptibly. As to the individual bricks the
faces exposed to the fire were observed to vitrify to some extent.
As an example it may be quoted that a brick (this is seen in
fig. 15 in the 3rd course above the iron-pipe farthest to the left)
was vitrified to such a degree, that the cross-sectional areas of
the terminal faces were respectively about 14,5 X 5,0 cm and
about 14,8 X 5,4 cm, whilst the cross-sectional area about 4 cm
from the terminal faces and farther in was about 15,5 X 6,8 cm.
The brick was estimated to be one of the bricks that had suffered
most, likewise as its projecting much on the wrong side, which
is shown by the photograph, suggests the brick having been
ligthly burnt in proportion to the rest of the bricks, Ilie bricks
most lightly burnt being longest owing to their shrinking the least
on being burnt.
The manufacturing of moler bricks in Frederiksholm Brick-
works is steadily developing. Among new applications may be
quoted that about 40,000 bricks have been employed for the
new large boilers of Frederiksberg Sporvejs- og Elektricitets
Akts. (Frederiksberg Tramway- and Electricity Company) in
the new electric station on Finsensvej. On account of the
slight thermal conductivity of the bricks they have been
employed to the masonry of the »Economizers« and, being so
light, for a large, highly situated, horizontal flue. The engineer
of the Company, Prof. Bache of the Royal Polyt. Inst., has ex-
pressed very appreciatively on the bricks for both applications.
As to another application of moler, on which the Laboratory
has also made researches, is referred to Section III g.
c. Testing of Sand-Lime Bricks.
Among the examinations of sand-lime-bricks made by the
Laboratory those are no doubt of most interest that treat of
tests of resistance to frost of sand-lime-
b ricks, the latter being the subject of the report XV of the