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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150
Sort D.
1) clasped into straps.
The bricks had apparently not suffered the least
2) standing on one header-side.
In all bricks the header-sides turning downwards were quite
frozen off, there were besides some other damages, smaller or
larger, to be observed in all the bricks.
In the present figures among which fig. 17, p. 53 shows B-
bricks, fig. 18, p. 54 C-bricks, fig. 19, p. 55 D-bricks, that row
of bricks off which is written X consists of some of the bricks
that have been clasped into straps, the row Y of some of the
bricks that have stood on one header-side and the row Z of some
of the bricks the resistance to frost of which has been tested
according to the usual method of the Laboratory. For B the row
of Z is absent, these bricks, as it appears from the register, having-
gone through the compression tests after the tests of resistance
to frost.
b. Common Bricks Tested as to their Resistance to Frost
by all the Methods.
The above named experiments had substantiated
that the common test of resistance to frost of
the Laboratory was much more severe than
the test by which the bricks were clasped into
straps, the latter coming much nearer to that of the Berlin La-
boratory. Whether the changed test were quite congruent with
that of the Berlin Laboratory could not. be made out; in that
case the loss of weight taking place in both places during the
freezing and due to the evaporation ought to have been substan-
tiated. But it had become apparent that generally recognised1)
German manufactures could not stand the test of resistance to
frost of the Danish States Testing Laboratory.
The Laboratory learning at the time, when these experiments
were being made, that considerable piles of bricks fro m
the demolished Castle were lying at Christiansborg,
’) Here the remark must, however, be inserted that even if the C-bricks are
to be counted among generally recognised manufactures, the bricks tested
at the laboratory cannot claim this title, not even meeting' the minimum
demands on resistance to compression of the German Union of Sand-Lime-
Brick Factories.