Page 56 - Kutnar, Andreja, et al., eds., 2015. Proceedings of the 1st COST Action FP1307 International Conference - Life Cycle Assessment, EPDs, and modified wood. University of Primorska Press, Koper.
P. 56
ar
and
Humar
(2011).
In
the
third
experiment,
load
cells
were
transformed
into
a
simple
tensiometer.
Specimens
were
positioned
in
contact
with
liquid
water
and
their
mass
was
monitored
for
a
few
days.
In
the
last
set
of
experiments,
water
exclusion
efficacy
was
verified
during
the
outdoor
procedure.
The
mass
of
the
horizontally
oriented
samples
was
continuously
monitored
for
100
days.
During
short
term
water
uptake
there
is
evidence
that
thermally
modified
specimens
uptake
less
water
than
the
untreated
control
specimens,
but
the
difference
is
not
significant.
Long
term
wetting
results
indicate
that
heat
treated
specimens
retained
considerably
less
water
than
control
specimens
(Figure
1).
Similar
results
were
observed
during
outdoor
tests
as
well
confirming
that
short
term
uptake
is
an
indicative
method.
As
short
term
measurements
were
performed
on
axial
surfaces
only,
these
measurements
do
not
reflect
the
overall
performance
of
wood.
We
believe
that
the
long-‐term
water
uptake
method
is
more
predictable
than
the
short
term
method.
Figure
1:
Drying
of
the
thermally
modified
specimens
in
indoor
conditions.
Specimens
were
mounted
on
load
cells.
References
Rep
G.,
Pohleven
F.,
Bučar
B.
2004.
Characteristics
of
thermally
modified
wood
in
vacuum.
In:
International
Research
Group
on
Wood
Preservation.
IRG/WP
04-‐40287.
Proceedings
IRG
Annual
Meeting
Ljubljana,
Slovenia.
International
Research
Group
on
Wood
Protection,
Stockholm.
Lesar
B.,
Humar,
M.
2011.
Use
of
wax
emulsions
for
improvement
of
wood
durability
and
sorption
properties.
European
Journal
of
Wood
Products,
69,
231-‐238.
EN
350
2015.
Durability
of
wood
and
wood-‐based
products
-‐
Testing
and
classification
of
the
resistance
to
biological
agents,
the
permeability
to
water
and
the
performance
of
wood
and
wood-‐based
materials.
European
Committee
for
Standardization.
Acknowledgments:
The
authors
acknowledge
support
of
the
Slovenian
Research
Agency
within
the
framework
of
project
L4-‐
5517
and
programme
P4-‐0015.
Operation
part
financed
by
European
Union,
European
Regional
Development
Found
support
of
the
Research
voucher
-‐
Silvaprodukt
d.o.o.
and
Tadej
Zimic
s.p.
–
500154
and
project
‘WINdow
based
on
THERmally
modified
wood
with
high
performance
WAX
coating’
(WINTHERWAX,
666206).
44
and
Humar
(2011).
In
the
third
experiment,
load
cells
were
transformed
into
a
simple
tensiometer.
Specimens
were
positioned
in
contact
with
liquid
water
and
their
mass
was
monitored
for
a
few
days.
In
the
last
set
of
experiments,
water
exclusion
efficacy
was
verified
during
the
outdoor
procedure.
The
mass
of
the
horizontally
oriented
samples
was
continuously
monitored
for
100
days.
During
short
term
water
uptake
there
is
evidence
that
thermally
modified
specimens
uptake
less
water
than
the
untreated
control
specimens,
but
the
difference
is
not
significant.
Long
term
wetting
results
indicate
that
heat
treated
specimens
retained
considerably
less
water
than
control
specimens
(Figure
1).
Similar
results
were
observed
during
outdoor
tests
as
well
confirming
that
short
term
uptake
is
an
indicative
method.
As
short
term
measurements
were
performed
on
axial
surfaces
only,
these
measurements
do
not
reflect
the
overall
performance
of
wood.
We
believe
that
the
long-‐term
water
uptake
method
is
more
predictable
than
the
short
term
method.
Figure
1:
Drying
of
the
thermally
modified
specimens
in
indoor
conditions.
Specimens
were
mounted
on
load
cells.
References
Rep
G.,
Pohleven
F.,
Bučar
B.
2004.
Characteristics
of
thermally
modified
wood
in
vacuum.
In:
International
Research
Group
on
Wood
Preservation.
IRG/WP
04-‐40287.
Proceedings
IRG
Annual
Meeting
Ljubljana,
Slovenia.
International
Research
Group
on
Wood
Protection,
Stockholm.
Lesar
B.,
Humar,
M.
2011.
Use
of
wax
emulsions
for
improvement
of
wood
durability
and
sorption
properties.
European
Journal
of
Wood
Products,
69,
231-‐238.
EN
350
2015.
Durability
of
wood
and
wood-‐based
products
-‐
Testing
and
classification
of
the
resistance
to
biological
agents,
the
permeability
to
water
and
the
performance
of
wood
and
wood-‐based
materials.
European
Committee
for
Standardization.
Acknowledgments:
The
authors
acknowledge
support
of
the
Slovenian
Research
Agency
within
the
framework
of
project
L4-‐
5517
and
programme
P4-‐0015.
Operation
part
financed
by
European
Union,
European
Regional
Development
Found
support
of
the
Research
voucher
-‐
Silvaprodukt
d.o.o.
and
Tadej
Zimic
s.p.
–
500154
and
project
‘WINdow
based
on
THERmally
modified
wood
with
high
performance
WAX
coating’
(WINTHERWAX,
666206).
44
