Page 79 - 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. 79
nges
in
the
modulus
of
elasticity
of
beeswax
impregnated
wood
during
soil
contact
Róbert
Németh1,
Dimitrios
Tsalagkas2,
Miklós
Bak
3
1
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Science;
Hungary;
robert.nemeth@skk.nyme.hu
2
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Based
Products
and
Technologies;
Hungary;
dtsalag@hotmail.com
3
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Science;
Hungary;
miklos.bak@skk.nyme.hu
Keywords:
Beeswax,
Soil
contact,
Wood
protection,
MOE,
SEM
Since
biocides,
due
to
EU
regulations
are
increasingly
restricted,
waxes
and
wax
emulsions
are
becoming
important
solutions
for
non-‐biocidal
wood
protection
in
outdoor
applications
to
improve
durability,
dimensional
stability
and
sorption
properties.
The
objective
of
this
study
was
to
evaluate
the
effectiveness
of
a
full
cell
process
beeswax
impregnation
against
the
degradation
of
less
durable
wood
species
(poplar
and
beech)
when
they
are
in
contact
with
soil
for
18
months.
Various
beeswax
impregnation
intensities
were
examined
in
both
poplar
and
beech.
Impregnation
of
the
oven
dry
samples
was
made
at
80
°C
with
150
mbar
pre-‐vacuum
and
atmospheric
pressure.
Impregnated
samples
were
separated
into
three
groups,
on
the
basis
of
the
degree
of
pore
saturation
(DPS)
(Table
1).
The
effect
of
outdoor
exposure
with
soil
contact
of
the
samples
was
investigated
under
laboratory
conditions,
based
on
the
standard
ENV
807.
Modulus
of
elasticity
(MOE)
was
determined
initially
at
the
absolute
dry
states
of
the
unimpregnated
and
impregnated
samples
before
the
insertion
of
the
samples
into
the
soil,
after
one
month
of
soil
contact,
and
after
18
months
of
soil
contact.
After
18
months
of
soil
contact,
the
samples
were
investigated
with
scanning
electron
microscope
(SEM)
imaging
to
determine
the
extent
of
the
decay
and
the
effect
of
beeswax
on
the
decay.
Table
1:
Sample
Groups
According
to
the
Degree
of
Pore
Saturation
(DPS)
Group
Poplar1
Poplar2
Poplar3
Beech1
Beech2
Beech3
DPS
(%)
20-‐40
40-‐55
55-‐70
60-‐75
75-‐90
90-‐100
67
in
the
modulus
of
elasticity
of
beeswax
impregnated
wood
during
soil
contact
Róbert
Németh1,
Dimitrios
Tsalagkas2,
Miklós
Bak
3
1
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Science;
Hungary;
robert.nemeth@skk.nyme.hu
2
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Based
Products
and
Technologies;
Hungary;
dtsalag@hotmail.com
3
University
of
West
Hungary;
Simonyi
Károly
Faculty
of
Engineering,
Wood
Sciences
and
Applied
Arts;
Institute
of
Wood
Science;
Hungary;
miklos.bak@skk.nyme.hu
Keywords:
Beeswax,
Soil
contact,
Wood
protection,
MOE,
SEM
Since
biocides,
due
to
EU
regulations
are
increasingly
restricted,
waxes
and
wax
emulsions
are
becoming
important
solutions
for
non-‐biocidal
wood
protection
in
outdoor
applications
to
improve
durability,
dimensional
stability
and
sorption
properties.
The
objective
of
this
study
was
to
evaluate
the
effectiveness
of
a
full
cell
process
beeswax
impregnation
against
the
degradation
of
less
durable
wood
species
(poplar
and
beech)
when
they
are
in
contact
with
soil
for
18
months.
Various
beeswax
impregnation
intensities
were
examined
in
both
poplar
and
beech.
Impregnation
of
the
oven
dry
samples
was
made
at
80
°C
with
150
mbar
pre-‐vacuum
and
atmospheric
pressure.
Impregnated
samples
were
separated
into
three
groups,
on
the
basis
of
the
degree
of
pore
saturation
(DPS)
(Table
1).
The
effect
of
outdoor
exposure
with
soil
contact
of
the
samples
was
investigated
under
laboratory
conditions,
based
on
the
standard
ENV
807.
Modulus
of
elasticity
(MOE)
was
determined
initially
at
the
absolute
dry
states
of
the
unimpregnated
and
impregnated
samples
before
the
insertion
of
the
samples
into
the
soil,
after
one
month
of
soil
contact,
and
after
18
months
of
soil
contact.
After
18
months
of
soil
contact,
the
samples
were
investigated
with
scanning
electron
microscope
(SEM)
imaging
to
determine
the
extent
of
the
decay
and
the
effect
of
beeswax
on
the
decay.
Table
1:
Sample
Groups
According
to
the
Degree
of
Pore
Saturation
(DPS)
Group
Poplar1
Poplar2
Poplar3
Beech1
Beech2
Beech3
DPS
(%)
20-‐40
40-‐55
55-‐70
60-‐75
75-‐90
90-‐100
67
