ecological, and environmentallycomdecco.com/assets/final-dual-en-ingles.pdf · zeta-tech. dual...
TRANSCRIPT
Wood is the “greenest”, most ecological, and environmentally friendliest material for the manufacture of sleepers, it is a renewable natural resource, an adequately exploited forest regenerates itself, and if a tree reaches an enough height for a sleeper to be produced, it should had grown during many years in which it contributed with oxygen to the atmosphere capturing carbon dioxide and converting it into organic tissue.
The energy used to transform a tree into a sleeper is much less than that required to manufacturing a concrete, plastic, or steel sleeper. Moreover, once its useful life ends, the wooden crosstie is decomposed and naturally reintegrates into the ecosystem, whereas concrete cannot be recycled, and recycling plastic and steel is extremely expensive.
In this chart it can be appreciated in the blue line the negative balance (absorbs instead of emitting CO2) of the wood during its life cycle. , this is while the tree is growing, how to transform it into a sleepers pollutes less than transforming other materials, and how at the end of its useful life it contaminates less than concrete, steel and plastic.
In this chart it can be appreciated how treated wood sleepers, that is the first bar from left in brown color, is the material that emits less polluting gases compared with other materials.
We believe…
Wood is GREEN Renewable resource Lowest manufacturing energy requirements In terms of carbon; at worst it is neutral End-of-life energy value as biomass
“A+” from an Engineering perspective for NS applications
Overall best return on investment Room to improve in terms of longevity and
economics
Take it from the Norfolk Southern presentation in the 92° RTA annual convention 2010.
Treatment purpose in wood is to avoid its
deterioration by protecting it from the attack of
fungi that cause rot, and insects that could eat it.
Immunizers acts as herbicides and fungicides,
that increase the useful life of the wood with the
consequent savings in maintenance and
replacement of sleepers
Borate is a very efficient natural pesticide and fungicide against which no organism has developed resistance.
The extraordinary borate diffusion is due to
the fact that it uses the own wood moisture
as a vehicle to penetrate to the heart of the
wood where no other immunizer can
penetrate.
Creosote creates a crust that encapsulates
borate inside the sleeper because due to its
excellent diffusion it will leave the sleeper if it
is not captured inside the wood.
Total Penetration= Total protection
Borate penetration in a sleeper after one year of being treated.
Red shows the borate diffusion.
Benefits into a sleeper:
No rotting during air seasoning / No
corrosion rot
DUAL TREATED TIES – CREOSOTE OVER BORATE ESTIMATED LIFE EXTENSION + 10 YEARS
Protectsagainsttermites
Borate prevents corrosion
induced by the nails
oxidation.
Recent studies of the RTA (Zeta-Tech 7/10/2011) have shown that the dual treatment of borate + creosote leads to a significant extension in the useful life of wooden sleepers, up to more than double in many cases.
ZETA-TECH
In the southeastern United States, therange of failure, when the sleeper has tobe replaced is 8 to 25 years for sleeperstreated only with creosote.
an average useful life of 18 years
With dual treatment is from 18 to 54 years
an average useful life of 38 years
ZETA-TECH
RANGE OF TIE LIVES FOR 95% OF THE TIES (YEARS)
CLIMATE ZONE CREOSOTE-ONLY DUAL TREATED
1 20.21 to 60.95 NOT DUAL TREATED
2 18.62 to 56.17 NOT DUAL TREATED
3 16.75 to 50.54 18.62 to 56.17
4 14.33 to 43.22 18.62 to 56.17
5 8.45 to 25.48 18.01 to 54.34
US SYSTEM WIDE 16.43 to 49.55 18.85 to 56.87
ZETA-TECH
0
5
10
15
20
25
30
35
40
Creosota Dual
años promediode vida util deun durmiente
ZETA-TECH
PROJECTED US WOOD TIE LIVES BASED ON
DUAL-TREATMENT IN ZONES 3, 4, AND 5
TIE LIFE (YEARS) TIE LIFE (YEARS)
CLIMATE ZONE CREOSOTE-ONLY DUAL TREATED% INCREASE FROM
DUAL TREATED
1 43.3 43.3 NOT DUAL TREATED
2 39.9 39.9 NOT DUAL TREATED
3 35.9 39.9 11.10%
4 30.7 39.9 30.00%
5 18.1 38.6 113.30%
US SYSTEM WIDE 35.2 40.4 14.80%
ZETA-TECH
Dual Treatment - Creosote/Borate usage
Program Year Number of crossties Switch ties2004 7,700 Nil2005 35,000 Nil2006 166,000 2,7002007 170,000 4,3002008 165,000 4,0002009 170,000 4,5002010 225,000 3,500
Tomado de la presentación de Canadian National Railroad en la 92° convención anual de la
RTA
CN required all ties south of Memphis to be preloaded with a
borate solution prior to air seasoning
For every dollar invested in concrete 60 cents are spent using dual treatment, a saving of up to 40%
After 15 years,
borate applied by
pressure
treatment
continues to
protect against
fungi and
termites at the
base, tip and
entire body of the sleeper.
Conclusions
Borates Prevent Incipient Decay during seasoning
Borates prevent Corrosion and Spike Kill
Stand alone Borates give good performance in ties
Borate performance is significantly greater in drier climates than in
wetter climates, and in Oak rather than Gum (less leaching).
The best ties are Dual Treated
– Borate treatment to green tie followed by creosote treatment to dry
tie can extend the life of ties by approximately 10 years.
Costs similar as typically Creosote retention over borate treatment is
reduced by 30 % (8 lb Creosote reduced to 6 lb Creosote retention per
tie).
Dual treated wood ties significantly better than concrete.
– Natural renewable resource
– Lower Cost in service
Referencias:
Treated wood utility poles offer enviromental life cicle advangages
compared to steel, concrete & FRC publicado el 15/04/2011 por
Aquaeter
Canadian National Railroad en la 92° convención anual de la RTA
Presentación de Nisus Corporation a Carbones del Cerrejón Limited
en Colombia.
Effect of Dual Treated (Borate-Creosote) of wood ties on average tie
life and life cicle cost publicado por Zeta-Tech el 07/10/2011